SQLServer 批量备份与还原
sqlserver
No
backup
batch
database
reduction
备份与还原是数据库避不开的主题，而作为DBA，经常会面临将一台机器上的所有数据库重新构建到一台新机器上的要求； 在现在都讲究自动化管理的时代，传统的界面操作备份还原的做法不仅浪费时间和精力，而且还很容易出错，并且这次完成后， 下次再有这样的要求
备份与还原是数据库避不开的主题，而作为DBA，经常会面临将一台机器上的所有数据库重新构建到一台新机器上的要求；
在现在都讲究自动化管理的时代，传统的界面操作备份还原的做法不仅浪费时间和精力，而且还很容易出错，并且这次完成后，
下次再有这样的要求，必须又重头开始（估计做5次就能做得人狂吐）；于是，我们需要一套应对这种频繁操作、耗时、耗精力
的通用处理方法，所以以下批处理脚本就诞生了。
脚本主要的功能：
1. 备份一个服务器上的所有数据库（当然你也可以选择），备份文件按数据库名+日期生成，以.bak 结尾；
2. 将所有的备份文件还原到一台新机器上；
3. 验证磁盘和路径的正确性；
说明：
脚本合适 SQLServer 2005 & 2008 版本；
批量备份数据库：
<span>--</span><span>---------------------------批量备份数据-------------------------------------------</span><span><br></span><span>Use</span><span> master<br></span><span>GO</span><span><br></span><span>/*</span><span>=================Usp_BackUp_DataBase========================<br> =====BackUp Sigle DataBase ======<br> =====Ken.Guo ======<br> =====2010.9.10 ======<br> =====Version: 2005 & 2008 SQL Server ======<br> =====EXEC Usp_BackUp_DataBase 'MyDB','D:\BackUp' ======<br> ============================================================<br></span><span>*/</span><span><br></span><span>CREATE</span><span>PROC</span><span>[</span><span>dbo</span><span>]</span><span>.</span><span>[</span><span>Usp_BackUp_DataBase</span><span>]</span><span>@DatabaseName</span><span>nvarchar</span><span>(</span><span>200</span><span>),</span><span>@Path</span><span>nvarchar</span><span>(</span><span>200</span><span>) <br></span><span>AS</span><span> <br> </span><span>BEGIN</span><span> <br> </span><span>DECLARE</span><span>@fn</span><span>varchar</span><span>(</span><span>200</span><span>)<br> ,</span><span>@sql</span><span>varchar</span><span>(</span><span>1000</span><span>) <br> </span><span>SET</span><span>@fn</span><span>=</span><span>@Path</span><span>+</span><span>(</span><span>case</span><span>when</span><span>right</span><span>(</span><span>@Path</span><span>,</span><span>1</span><span>) </span><span></span><span>'</span><span>\</span><span>'</span><span>then</span><span>'</span><span>\</span><span>'</span><span>else</span><span>''</span><span>end</span><span>) <br> </span><span>+</span><span>@DatabaseName</span><span>+</span><span>'</span><span>_</span><span>'</span><span> <br> </span><span>+</span><span>convert</span><span>(</span><span>char</span><span>(</span><span>8</span><span>),</span><span>getdate</span><span>(),</span><span>112</span><span>)</span><span>+</span><span>'</span><span>_</span><span>'</span><span> <br> </span><span>+</span><span>replace</span><span>(</span><span>convert</span><span>(</span><span>char</span><span>(</span><span>8</span><span>),</span><span>getdate</span><span>(),</span><span>108</span><span>),</span><span>'</span><span>:</span><span>'</span><span>,</span><span>''</span><span>) <br> </span><span>+</span><span>'</span><span>.bak</span><span>'</span><span> <br> </span><span>set</span><span>@sql</span><span>=</span><span>'</span><span>backup database </span><span>'</span><span>+</span><span>@DatabaseName</span><span>+</span><span>'</span><span> to disk = N</span><span>'''</span><span>+</span><span>@fn</span><span>+</span><span>''''</span><span> <br> </span><span>--</span><span>SELECT @sql </span><span><br></span><span>EXEC</span><span>(</span><span>@sql</span><span>) <br> </span><span>END</span><span><br><br></span><span>GO</span><span><br><br></span><span>Use</span><span> master<br></span><span>GO</span><span><br></span><span>/*</span><span>=============BackUp Mutile DataBase=========================</span><span>*/</span><span><br></span><span>DECLARE</span><span>@dbname</span><span>nvarchar</span><span>(</span><span>200</span><span>)<br> ,</span><span>@backup_path</span><span>nvarchar</span><span>(</span><span>200</span><span>)<br></span><span>SET</span><span>@backup_path</span><span>=</span><span>'</span><span>D:\BackUp\</span><span>'</span><span><br></span><span>DECLARE</span><span> db_info </span><span>CURSOR</span><span> <br> LOCAL <br> STATIC <br> READ_ONLY <br> FORWARD_ONLY <br></span><span>FOR</span><span>--</span><span>根据查询，添加其他筛选条件</span><span><br></span><span>SELECT</span><span> <br> name <br> </span><span>FROM</span><span> master.sys.databases </span><span>WITH</span><span>(NOLOCK) <br> </span><span>WHERE</span><span> <br> database_id</span><span>></span><span>4</span><span><br><br></span><span>OPEN</span><span> db_info<br></span><span>FETCH</span><span>NEXT</span><span>FROM</span><span> db_info </span><span>INTO</span><span>@dbname</span><span><br><br></span><span>WHILE</span><span>@@FETCH_STATUS</span><span>=</span><span>0</span><span><br> </span><span>begin</span><span><br> </span><span>EXEC</span><span> master.dbo.<span>Usp_BackUp_DataBase </span></span><span>@dbname</span><span>,</span><span>@backup_path</span><span><br> </span><span>FETCH</span><span>NEXT</span><span>FROM</span><span> db_info </span><span>INTO</span><span>@dbname</span><span><br> </span><span>END</span><span><br></span><span>close</span><span> db_info<br></span><span>deallocate</span><span> db_info<br><br></span><span>--</span><span>-------------------------------BackUp DataBase End------------------------------------</span>
Copy after login
检查还原磁盘：
<span>Use</span><span> master<br></span><span>GO</span><span><br></span><span>/*</span><span>=================Check Restore Path Drives Exists==========================<br> =====Ken.Guo ======<br> =====2010.9.10 ======<br> =====EXEC Usp_Check_DriveExists @RestoreDataPath,@ResultCount OUTPUT ======<br> ===========================================================================<br></span><span>*/</span><span><br></span><span>CREATE</span><span>PROC</span><span> Usp_Check_DriveExists(<br> </span><span>@RestoreDataPath</span><span>nvarchar</span><span>(</span><span>200</span><span>)<br> ,</span><span>@ResultCount</span><span>int</span><span> OUTPUT) <br></span><span>AS</span><span><br></span><span>BEGIN</span><span><br></span><span>--</span><span>Check Restore Path and Size >1000M</span><span><br></span><span>if</span><span>CHARINDEX</span><span>(</span><span>'</span><span>:</span><span>'</span><span>,</span><span>@RestoreDataPath</span><span>)</span><span>></span><span>0</span><span><br> </span><span>begin</span><span><br> </span><span>DECLARE</span><span>@Drive</span><span>nvarchar</span><span>(</span><span>10</span><span>)<br> ,</span><span>@errorinfo</span><span>nvarchar</span><span>(</span><span>500</span><span>)<br><br> </span><span>DECLARE</span><span>@DriveList</span><span>TABLE</span><span> <br> ( <br> Drive </span><span>nvarchar</span><span>(</span><span>10</span><span>) <br> ,DSize </span><span>bigint</span><span> <br> )<br> </span><span>INSERT</span><span>INTO</span><span>@DriveList</span><span><br> </span><span>EXEC</span><span> master.dbo.xp_fixeddrives<br><br> </span><span>SET</span><span>@Drive</span><span>=Left</span><span>(</span><span>@RestoreDataPath</span><span>,</span><span>CHARINDEX</span><span>(</span><span>'</span><span>:</span><span>'</span><span>,</span><span>@RestoreDataPath</span><span>)</span><span>-</span><span>1</span><span>)<br> </span><span>if</span><span>not</span><span>exists</span><span>(</span><span>SELECT</span><span> <br> </span><span>*</span><span> <br> </span><span>FROM</span><span>@DriveList</span><span> <br> </span><span>WHERE</span><span> <br> Drive</span><span>=</span><span>@Drive</span><span> <br> </span><span>AND</span><span> DSize</span><span>></span><span>1024</span><span><br> <br> )<br> </span><span>begin</span><span><br> </span><span>set</span><span>@errorinfo</span><span>=</span><span>N</span><span>'</span><span>找不到还原磁盘:</span><span>'</span><span>+</span><span>@Drive</span><span>+</span><span>N</span><span>'</span><span> ，或者磁盘剩余空间小于1G</span><span>'</span><span><br> </span><span>RAISERROR</span><span>50001</span><span>@errorinfo</span><span> <br> </span><span>set</span><span>@ResultCount</span><span>=</span><span>0</span><span><br> </span><span>return</span><span><br> </span><span>end</span><span><br> </span><span>end</span><span><br></span><span>else</span><span>if</span><span>(</span><span>LEN</span><span>(</span><span>@RestoreDataPath</span><span>)</span><span>></span><span>1</span><span>) </span><span>AND</span><span>CHARINDEX</span><span>(</span><span>'</span><span>:</span><span>'</span><span>,</span><span>@RestoreDataPath</span><span>)</span><span>=</span><span>0</span><span><br> </span><span>begin</span><span><br> </span><span>set</span><span>@errorinfo</span><span>=</span><span>N</span><span>'</span><span>还原路径错误:</span><span>'</span><span>+</span><span>@RestoreDataPath</span><span>+</span><span>N</span><span>'</span><span>，必须包含":" 号</span><span>'</span><span><br> </span><span>Raiserror</span><span>50001</span><span>@errorinfo</span><span> <br> </span><span>set</span><span>@ResultCount</span><span>=</span><span>0</span><span><br> </span><span>return</span><span> <br> </span><span>end</span><span><br> </span><span>set</span><span>@ResultCount</span><span>=</span><span>1</span><span><br></span><span>end</span><span><br></span><span>GO</span>
Copy after login
还原单个数据库：
<span>Use</span><span> master<br></span><span>GO</span><span><br></span><span>/*</span><span>=================Usp_RestoreDataBaseFormPath=======================================<br> =====Restore Single DataBase From a Back File ======<br> =====Ken.Guo ======<br> =====2010.9.10 ======<br> =====Version: 2005 & 2008 SQL Server ======<br> =====Usp_RestoreDataBaseFormPath 'D:\databack\dbcenter.bak','D:\Data',0 ======<br> =====Key Point Info: ======<br> --Restore HeaderOnly from disk='D:\data\xx.bak'<br> --Restore FileListOnly from disk='D:\data\xx.bak'<br> ===================================================================================<br></span><span>*/</span><span><br></span><span>CREATE</span><span>PROC</span><span> Usp_RestoreDataBaseFormPath<br>(</span><span>@DatabBaseBakPath</span><span>nvarchar</span><span>(</span><span>400</span><span>),<br> </span><span>@RestoreDataPath</span><span>nvarchar</span><span>(</span><span>400</span><span>)</span><span>=</span><span>''</span><span>, </span><span>--</span><span>RESTORE DATABASE PATH </span><span><br></span><span>@IsRun</span><span>smallint</span><span>=</span><span>0</span><span>--</span><span> 0 PRINT 1 run </span><span><br></span><span>) <br></span><span>AS</span><span><br></span><span>BEGIN</span><span><br></span><span>set</span><span> nocount </span><span>on</span><span><br><br></span><span>declare</span><span>@dbname</span><span>nvarchar</span><span>(</span><span>200</span><span>),</span><span>@SQL</span><span>nvarchar</span><span>(</span><span>4000</span><span>),</span><span>@DirSQL</span><span>nvarchar</span><span>(</span><span>1000</span><span>),</span><span>@errorinfo</span><span>nvarchar</span><span>(</span><span>300</span><span>)<br></span><span>--</span><span>add path \</span><span><br></span><span>if</span><span> (</span><span>@RestoreDataPath</span><span>is</span><span>not</span><span>null</span><span>) </span><span>and</span><span>len</span><span>(</span><span>@RestoreDataPath</span><span>)</span><span>></span><span>1</span><span> <br> </span><span>and</span><span> (</span><span>right</span><span>(</span><span>@RestoreDataPath</span><span>,</span><span>1</span><span>)</span><span></span><span>'</span><span>\</span><span>'</span><span>)<br> </span><span>set</span><span>@RestoreDataPath</span><span>=</span><span>@RestoreDataPath</span><span>+</span><span>'</span><span>\</span><span>'</span><span><br><br></span><span>declare</span><span>@checkdrive</span><span>int</span><span><br></span><span>set</span><span>@checkdrive</span><span>=</span><span>1</span><span><br> </span><span>exec</span><span> master.dbo.Usp_Check_DriveExists </span><span>@RestoreDataPath</span><span>,</span><span>@checkdrive</span><span> output<br><br> </span><span>if</span><span>(</span><span>@checkdrive</span><span></span><span>1</span><span>)<br> </span><span>Goto</span><span> ExitFLag <br><br></span><span>DECLARE</span><span>@BakFileList</span><span>TABLE</span><span> <br> ( LogicalName </span><span>nvarchar</span><span>(</span><span>128</span><span>)<br> ,PhysicalName </span><span>nvarchar</span><span>(</span><span>260</span><span>)<br> )<br><br></span><span>DECLARE</span><span>@BakHeaderInfo</span><span>TABLE</span><span><br> (<br> DatabaseName </span><span>nvarchar</span><span>(</span><span>128</span><span>)<br> )<br><br></span><span>if</span><span>Charindex</span><span>(</span><span>'</span><span>Microsoft SQL Server 2008</span><span>'</span><span>,</span><span>@@VERSION</span><span>)</span><span>></span><span>0</span><span><br> </span><span>begin</span><span><br> </span><span>--</span><span>SQL Server 2008 </span><span><br></span><span>DECLARE</span><span>@BakFileList2008</span><span>TABLE</span><span> <br> ( LogicalName </span><span>nvarchar</span><span>(</span><span>128</span><span>)<br> ,PhysicalName </span><span>nvarchar</span><span>(</span><span>260</span><span>)<br> ,Type </span><span>char</span><span>(</span><span>1</span><span>)<br> ,FileGroupName </span><span>nvarchar</span><span>(</span><span>128</span><span>)<br> ,SIZE numeric(</span><span>20</span><span>,</span><span>0</span><span>)<br> ,MaxSize numeric(</span><span>20</span><span>,</span><span>0</span><span>)<br> ,FileID </span><span>bigint</span><span><br> ,CreateLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>)<br> ,DropLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>) </span><span>NULL</span><span><br> ,UniqueID </span><span>uniqueidentifier</span><span><br> ,ReadOnlyLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>) </span><span>NULL</span><span><br> ,ReadWriteLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>) </span><span>NULL</span><span><br> ,BackupSizeInBytes </span><span>bigint</span><span><br> ,SourceBlockSize </span><span>int</span><span><br> ,FileGroupID </span><span>int</span><span><br> ,LogGroupGUID </span><span>uniqueidentifier</span><span>NULL</span><span><br> ,DifferentialBaseLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>) </span><span>NULL</span><span><br> ,DifferentialBaseGUID </span><span>uniqueidentifier</span><span><br> ,IsReadOnly </span><span>bit</span><span><br> ,IsPresent </span><span>bit</span><span><br> ,TDEThumbprint </span><span>varbinary</span><span>(</span><span>32</span><span>)<br> ) <br> <br> </span><span>INSERT</span><span>INTO</span><span>@BakFileList2008</span><span> <br> </span><span>EXEC</span><span> sp_executesql N</span><span>'</span><span>Restore FileListOnly From Disk=@DatabBaseBakPath</span><span>'</span><span>,N</span><span>'</span><span>@DatabBaseBakPath nvarchar(260)</span><span>'</span><span>,</span><span>@DatabBaseBakPath</span><span> <br><br> </span><span>DECLARE</span><span>@BakHeaderInfo2008</span><span>TABLE</span><span><br> (<br> BackupName </span><span>nvarchar</span><span>(</span><span>128</span><span>)<br> ,BackupDescription </span><span>nvarchar</span><span>(</span><span>255</span><span>)<br> ,BackupType </span><span>smallint</span><span><br> ,ExpirationDate </span><span>datetime</span><span><br> ,Compressed </span><span>tinyint</span><span><br> ,POSITION </span><span>smallint</span><span><br> ,DeviceType </span><span>tinyint</span><span><br> ,UserName </span><span>nvarchar</span><span>(</span><span>128</span><span>)<br> ,ServerName </span><span>nvarchar</span><span>(</span><span>128</span><span>)<br> ,DatabaseName </span><span>nvarchar</span><span>(</span><span>128</span><span>)<br> ,DatabaseVersion </span><span>int</span><span><br> ,DatabaseCreationDate </span><span>datetime</span><span><br> ,BackupSize numeric(</span><span>20</span><span>,</span><span>0</span><span>)<br> ,FirstLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>)<br> ,LastLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>)<br> ,CheckpointLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>)<br> ,DatabaseBackupLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>)<br> ,BackupStartDate </span><span>datetime</span><span><br> ,BackupFinishDate </span><span>datetime</span><span><br> ,SortOrder </span><span>smallint</span><span><br> ,CodePage </span><span>smallint</span><span><br> ,UnicodeLocaleId </span><span>int</span><span><br> ,UnicodeComparisonStyle </span><span>int</span><span><br> ,CompatibilityLevel </span><span>tinyint</span><span><br> ,SoftwareVendorId </span><span>int</span><span><br> ,SoftwareVersionMajor </span><span>int</span><span><br> ,SoftwareVersionMinor </span><span>int</span><span><br> ,SoftwareVersionBuild </span><span>int</span><span><br> ,MachineName </span><span>nvarchar</span><span>(</span><span>128</span><span>)<br> ,Flags </span><span>int</span><span><br> ,BindingID </span><span>uniqueidentifier</span><span><br> ,RecoveryForkID </span><span>uniqueidentifier</span><span><br> ,COLLATION </span><span>nvarchar</span><span>(</span><span>128</span><span>)<br> ,FamilyGUID </span><span>uniqueidentifier</span><span><br> ,HasBulkLoggedData </span><span>bit</span><span><br> ,IsSnapshot </span><span>bit</span><span><br> ,IsReadOnly </span><span>bit</span><span><br> ,IsSingleUser </span><span>bit</span><span><br> ,HasBackupChecksums </span><span>bit</span><span><br> ,IsDamaged </span><span>bit</span><span><br> ,BeginsLogChain </span><span>bit</span><span><br> ,HasIncompleteMetaData </span><span>bit</span><span><br> ,IsForceOffline </span><span>bit</span><span><br> ,IsCopyOnly </span><span>bit</span><span><br> ,FirstRecoveryForkID </span><span>uniqueidentifier</span><span><br> ,ForkPointLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>) </span><span>NULL</span><span><br> ,RecoveryModel </span><span>nvarchar</span><span>(</span><span>60</span><span>)<br> ,DifferentialBaseLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>) </span><span>NULL</span><span><br> ,DifferentialBaseGUID </span><span>uniqueidentifier</span><span><br> ,BackupTypeDescription </span><span>nvarchar</span><span>(</span><span>60</span><span>)<br> ,BackupSetGUID </span><span>uniqueidentifier</span><span>NULL</span><span><br> ,CompressedBackupSize numeric(</span><span>20</span><span>,</span><span>0</span><span>)<br> ) <br><br> </span><span>INSERT</span><span>INTO</span><span>@BakHeaderInfo2008</span><span> <br> </span><span>EXEC</span><span> sp_executesql N</span><span>'</span><span>Restore HeaderOnly From Disk=@DatabBaseBakPath</span><span>'</span><span>,N</span><span>'</span><span>@DatabBaseBakPath nvarchar(260)</span><span>'</span><span>,</span><span>@DatabBaseBakPath</span><span> <br> <br> </span><span>insert</span><span>into</span><span>@BakHeaderInfo</span><span>(DatabaseName)<br> </span><span>select</span><span> DatabaseName </span><span>from</span><span>@BakHeaderInfo2008</span><span><br><br> </span><span>insert</span><span>into</span><span>@BakFileList</span><span>(LogicalName ,PhysicalName)<br> </span><span>select</span><span> LogicalName ,PhysicalName </span><span>from</span><span>@BakFileList2008</span><span><br> </span><span>end</span><span><br></span><span>else</span><span><br> </span><span>begin</span><span><br> </span><span>--</span><span>SQL Server 2005 </span><span><br></span><span>DECLARE</span><span>@BakFileList2005</span><span>TABLE</span><span> <br> (<br> LogicalName </span><span>nvarchar</span><span>(</span><span>128</span><span>)<br> ,PhysicalName </span><span>nvarchar</span><span>(</span><span>260</span><span>)<br> ,Type </span><span>char</span><span>(</span><span>1</span><span>)<br> ,FileGroupName </span><span>nvarchar</span><span>(</span><span>128</span><span>)<br> ,SIZE numeric(</span><span>20</span><span>,</span><span>0</span><span>)<br> ,MaxSize numeric(</span><span>20</span><span>,</span><span>0</span><span>)<br> ,FileID </span><span>bigint</span><span><br> ,CreateLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>)<br> ,DropLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>) </span><span>NULL</span><span><br> ,UniqueID </span><span>uniqueidentifier</span><span><br> ,ReadOnlyLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>) </span><span>NULL</span><span><br> ,ReadWriteLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>) </span><span>NULL</span><span><br> ,BackupSizeInBytes </span><span>bigint</span><span><br> ,SourceBlockSize </span><span>int</span><span><br> ,FileGroupID </span><span>int</span><span><br> ,LogGroupGUID </span><span>uniqueidentifier</span><span>NULL</span><span><br> ,DifferentialBaseLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>) </span><span>NULL</span><span><br> ,DifferentialBaseGUID </span><span>uniqueidentifier</span><span><br> ,IsReadOnly </span><span>bit</span><span><br> ,IsPresent </span><span>bit</span><span><br> ) <br><br> </span><span>INSERT</span><span>INTO</span><span>@BakFileList2005</span><span> <br> </span><span>EXEC</span><span> sp_executesql N</span><span>'</span><span>Restore FileListOnly From Disk=@DatabBaseBakPath</span><span>'</span><span>,N</span><span>'</span><span>@DatabBaseBakPath nvarchar(260)</span><span>'</span><span>,</span><span>@DatabBaseBakPath</span><span> <br> <br> </span><span>DECLARE</span><span>@BakHeaderInfo2005</span><span>TABLE</span><span> <br> (<br> BackupName </span><span>nvarchar</span><span>(</span><span>128</span><span>)<br> ,BackupDescription </span><span>nvarchar</span><span>(</span><span>255</span><span>)<br> ,BackupType </span><span>smallint</span><span><br> ,ExpirationDate </span><span>datetime</span><span><br> ,Compressed </span><span>tinyint</span><span><br> ,POSITION </span><span>smallint</span><span><br> ,DeviceType </span><span>tinyint</span><span><br> ,UserName </span><span>nvarchar</span><span>(</span><span>128</span><span>)<br> ,ServerName </span><span>nvarchar</span><span>(</span><span>128</span><span>)<br> ,DatabaseName </span><span>nvarchar</span><span>(</span><span>128</span><span>)<br> ,DatabaseVersion </span><span>int</span><span><br> ,DatabaseCreationDate </span><span>datetime</span><span><br> ,BackupSize numeric(</span><span>20</span><span>,</span><span>0</span><span>)<br> ,FirstLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>)<br> ,LastLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>)<br> ,CheckpointLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>)<br> ,DatabaseBackupLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>)<br> ,BackupStartDate </span><span>datetime</span><span><br> ,BackupFinishDate </span><span>datetime</span><span><br> ,SortOrder </span><span>smallint</span><span><br> ,CodePage </span><span>smallint</span><span><br> ,UnicodeLocaleId </span><span>int</span><span><br> ,UnicodeComparisonStyle </span><span>int</span><span><br> ,CompatibilityLevel </span><span>tinyint</span><span><br> ,SoftwareVendorId </span><span>int</span><span><br> ,SoftwareVersionMajor </span><span>int</span><span><br> ,SoftwareVersionMinor </span><span>int</span><span><br> ,SoftwareVersionBuild </span><span>int</span><span><br> ,MachineName </span><span>nvarchar</span><span>(</span><span>128</span><span>)<br> ,Flags </span><span>int</span><span><br> ,BindingID </span><span>uniqueidentifier</span><span><br> ,RecoveryForkID </span><span>uniqueidentifier</span><span><br> ,COLLATION </span><span>nvarchar</span><span>(</span><span>128</span><span>)<br> ,FamilyGUID </span><span>uniqueidentifier</span><span><br> ,HasBulkLoggedData </span><span>bit</span><span><br> ,IsSnapshot </span><span>bit</span><span><br> ,IsReadOnly </span><span>bit</span><span><br> ,IsSingleUser </span><span>bit</span><span><br> ,HasBackupChecksums </span><span>bit</span><span><br> ,IsDamaged </span><span>bit</span><span><br> ,BeginsLogChain </span><span>bit</span><span><br> ,HasIncompleteMetaData </span><span>bit</span><span><br> ,IsForceOffline </span><span>bit</span><span><br> ,IsCopyOnly </span><span>bit</span><span><br> ,FirstRecoveryForkID </span><span>uniqueidentifier</span><span><br> ,ForkPointLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>) </span><span>NULL</span><span><br> ,RecoveryModel </span><span>nvarchar</span><span>(</span><span>60</span><span>)<br> ,DifferentialBaseLSN numeric(</span><span>25</span><span>,</span><span>0</span><span>) </span><span>NULL</span><span><br> ,DifferentialBaseGUID </span><span>uniqueidentifier</span><span><br> ,BackupTypeDescription </span><span>nvarchar</span><span>(</span><span>60</span><span>)<br> ,BackupSetGUID </span><span>uniqueidentifier</span><span>NULL</span><span><br> ) <br><br> </span><span>INSERT</span><span>INTO</span><span>@BakHeaderInfo2005</span><span> <br> </span><span>EXEC</span><span> sp_executesql N</span><span>'</span><span>Restore HeaderOnly From Disk=@DatabBaseBakPath</span><span>'</span><span>,N</span><span>'</span><span>@DatabBaseBakPath nvarchar(260)</span><span>'</span><span>,</span><span>@DatabBaseBakPath</span><span> <br><br> </span><span>insert</span><span>into</span><span>@BakHeaderInfo</span><span>(DatabaseName)<br> </span><span>select</span><span> DatabaseName </span><span>from</span><span>@BakHeaderInfo2005</span><span><br><br> </span><span>insert</span><span>into</span><span>@BakFileList</span><span>(LogicalName ,PhysicalName)<br> </span><span>select</span><span> LogicalName ,PhysicalName </span><span>from</span><span>@BakFileList2005</span><span><br><br> </span><span>end</span><span><br><br></span><span>--</span><span>Check back file info</span><span><br></span><span>if</span><span>not</span><span>exists</span><span> (</span><span>select</span><span>1</span><span>from</span><span>@BakFileList</span><span>) </span><span>OR</span><span>not</span><span>exists</span><span> (</span><span>select</span><span>1</span><span>from</span><span>@BakHeaderInfo</span><span>)<br> </span><span>begin</span><span><br> </span><span>set</span><span>@errorinfo</span><span>=</span><span>N</span><span>'</span><span>取不到备份文件:</span><span>'</span><span>+</span><span>@DatabBaseBakPath</span><span>+</span><span>N</span><span>'</span><span> 的信息，请检查备份文件是否正确或者版本是否兼容</span><span>'</span><span><br> </span><span>Raiserror</span><span>50001</span><span>@errorinfo</span><span> <br> </span><span>Goto</span><span> ExitFLag<br> </span><span>end</span><span><br><br></span><span>--</span><span>Get DataBase Name</span><span><br></span><span>SELECT</span><span>TOP</span><span>1</span><span>@dbname</span><span>=</span><span>databasename </span><span>FROM</span><span>@BakHeaderInfo</span><span><br><br></span><span>if</span><span>exists</span><span> (</span><span>select</span><span>1</span><span>from</span><span> master.sys.databases </span><span>with</span><span>(nolock) </span><span>where</span><span> name</span><span>=</span><span>@dbname</span><span>)<br> </span><span>begin</span><span><br> <br> </span><span>set</span><span>@errorinfo</span><span>=</span><span>N</span><span>'</span><span>数据库：</span><span>'</span><span>+</span><span>@dbname</span><span>+</span><span>N</span><span>'</span><span>已经存在，不能还原</span><span>'</span><span> <br> </span><span>Raiserror</span><span>50001</span><span>@errorinfo</span><span> <br> </span><span>Goto</span><span> ExitFLag<br> </span><span>end</span><span><br><br></span><span>DECLARE</span><span>@LogicalName</span><span>nvarchar</span><span>(</span><span>200</span><span>),</span><span>@PhysicalName</span><span>nvarchar</span><span>(</span><span>400</span><span>)<br> ,</span><span>@pos</span><span>int</span><span> ,</span><span>@endpos</span><span>int</span><span>,</span><span>@LastPhysicalName</span><span>nvarchar</span><span>(</span><span>400</span><span>)<br><br></span><span>DECLARE</span><span> db_file </span><span>CURSOR</span><span> <br> LOCAL <br> READ_ONLY <br> FORWARD_ONLY <br> STATIC <br></span><span>FOR</span><span><br> </span><span>SELECT</span><span> <br> LogicalName<br> ,PhysicalName <br> </span><span>FROM</span><span>@BakFileList</span><span><br><br></span><span>OPEN</span><span> db_file<br><br></span><span>set</span><span>@DirSQL</span><span>=</span><span>''</span><span><br></span><span>set</span><span>@SQL</span><span>=+</span><span>N</span><span>'</span><span>RESTORE DATABASE </span><span>'</span><span>+</span><span>QUOTENAME</span><span>(</span><span>@dbname</span><span>)</span><span>+</span><span>'</span><span> from disk=N</span><span>'''</span><span>+</span><span>@DatabBaseBakPath</span><span>+</span><span>''''</span><span><br></span><span>set</span><span>@SQL</span><span>=</span><span>@SQL</span><span>+</span><span>char</span><span>(</span><span>13</span><span>)</span><span>+</span><span>Char</span><span>(</span><span>10</span><span>)</span><span>+</span><span>N</span><span>'</span><span> WITH FILE=1 </span><span>'</span><span><br><br></span><span>FETCH</span><span>NEXT</span><span>FROM</span><span> db_file </span><span>INTO</span><span>@LogicalName</span><span>,</span><span>@PhysicalName</span><span><br><br></span><span>WHILE</span><span>@@FETCH_STATUS</span><span>=</span><span>0</span><span><br> </span><span>begin</span><span><br> </span><span>--</span><span>-Get DB PhysicalName</span><span><br></span><span>set</span><span>@endpos</span><span>=</span><span>0</span><span><br> </span><span>while</span><span>CHARINDEX</span><span>(</span><span>'</span><span>\</span><span>'</span><span>,</span><span>@PhysicalName</span><span>)</span><span>></span><span>0</span><span><br> </span><span>begin</span><span><br> </span><span>set</span><span>@pos</span><span>=</span><span>CHARINDEX</span><span>(</span><span>'</span><span>\</span><span>'</span><span>,</span><span>@PhysicalName</span><span>,</span><span>@endpos</span><span>)<br> </span><span>if</span><span>(</span><span>@pos</span><span>=</span><span>0</span><span>)<br> </span><span>break</span><span>;<br> </span><span>set</span><span>@endpos</span><span>=</span><span>@pos</span><span>+</span><span>1</span><span>;<br> </span><span>end</span><span><br> <br> </span><span>--</span><span>create new db path</span><span><br></span><span>if</span><span>(</span><span>len</span><span>(</span><span>@RestoreDataPath</span><span>)</span><span>></span><span>1</span><span>)<br> </span><span>begin</span><span><br> </span><span>set</span><span>@PhysicalName</span><span>=</span><span>@RestoreDataPath</span><span>+</span><span>@dbname</span><span>+</span><span>'</span><span>\</span><span>'</span><span>+</span><span>SUBSTRING</span><span>(</span><span>@PhysicalName</span><span>,</span><span>@endpos</span><span>,</span><span>LEN</span><span>(</span><span>@PhysicalName</span><span>)</span><span>-</span><span>@endpos</span><span>+</span><span>1</span><span>)<br> </span><span>set</span><span>@DirSQL</span><span>=</span><span>N</span><span>'</span><span>EXEC master.sys.xp_create_subdir N</span><span>'''</span><span>+</span><span>@RestoreDataPath</span><span>+</span><span>@dbname</span><span>+</span><span>''''</span><span><br> </span><span>END</span><span><br> </span><span>else</span><span><br> </span><span>begin</span><span><br> </span><span>if</span><span>len</span><span>(</span><span>@DirSQL</span><span>)</span><span><span>1</span><span>OR</span><span> (</span><span>SUBSTRING</span><span>(</span><span>@PhysicalName</span><span>,</span><span>1</span><span>,</span><span>@endpos</span><span>-</span><span>1</span><span>)</span><span></span><span>@LastPhysicalName</span><span>)<br> </span><span>if</span><span>(</span><span>len</span><span>(</span><span>@DirSQL</span><span>)</span><span><span>1</span><span>)<br> </span><span>set</span><span>@DirSQL</span><span>=</span><span>N</span><span>'</span><span>EXEC master.sys.xp_create_subdir N</span><span>'''</span><span>+</span><span>SUBSTRING</span><span>(</span><span>@PhysicalName</span><span>,</span><span>1</span><span>,</span><span>@endpos</span><span>-</span><span>1</span><span>)</span><span>+</span><span>''''</span><span><br> </span><span>else</span><span><br> </span><span>set</span><span>@DirSQL</span><span>=</span><span>@DirSQL</span><span>+</span><span>char</span><span>(</span><span>13</span><span>)</span><span>+</span><span>N</span><span>'</span><span>EXEC master.sys.xp_create_subdir N</span><span>'''</span><span>+</span><span>SUBSTRING</span><span>(</span><span>@PhysicalName</span><span>,</span><span>1</span><span>,</span><span>@endpos</span><span>-</span><span>1</span><span>)</span><span>+</span><span>''''</span><span><br> <br> </span><span>--</span><span>-Check Drives</span><span><br></span><span>set</span><span>@checkdrive</span><span>=</span><span>1</span><span><br> </span><span>exec</span><span> master.dbo.Usp_Check_DriveExists </span><span>@PhysicalName</span><span>,</span><span>@checkdrive</span><span> output<br><br> </span><span>if</span><span>(</span><span>@checkdrive</span><span></span><span>1</span><span>)<br> </span><span>Goto</span><span> ExitFLag <br><br> </span><span>set</span><span>@LastPhysicalName</span><span>=</span><span>SUBSTRING</span><span>(</span><span>@PhysicalName</span><span>,</span><span>1</span><span>,</span><span>@endpos</span><span>-</span><span>1</span><span>);<br> </span><span>END</span><span><br> <br> </span><span>set</span><span>@SQL</span><span>=</span><span>@SQL</span><span>+</span><span>char</span><span>(</span><span>13</span><span>)</span><span>+</span><span>Char</span><span>(</span><span>10</span><span>)</span><span>+</span><span>N</span><span>'</span><span> ,Move N</span><span>'''</span><span>+</span><span>@LogicalName</span><span>+</span><span>''''</span><span>+</span><span>'</span><span> TO N</span><span>'''</span><span>+</span><span>@PhysicalName</span><span>+</span><span>''''</span><span><br> <br> </span><span>FETCH</span><span>NEXT</span><span>FROM</span><span> db_file </span><span>INTO</span><span>@LogicalName</span><span>,</span><span>@PhysicalName</span><span><br> </span><span>end</span><span><br> </span><span>set</span><span>@SQL</span><span>=</span><span>@SQL</span><span>+</span><span>char</span><span>(</span><span>13</span><span>)</span><span>+</span><span>Char</span><span>(</span><span>10</span><span>)</span><span>+</span><span>N</span><span>'</span><span> ,NOUNLOAD,Recovery,STATS = 10</span><span>'</span><span><br><br></span><span>if</span><span>(</span><span>@IsRun</span><span>=</span><span>0</span><span>)<br> </span><span>print</span><span>( </span><span>@DirSQL</span><span>+</span><span>char</span><span>(</span><span>13</span><span>)</span><span>+</span><span>char</span><span>(</span><span>10</span><span>)</span><span>+</span><span>'</span><span>GO</span><span>'</span><span>+</span><span>char</span><span>(</span><span>13</span><span>)</span><span>+</span><span>Char</span><span>(</span><span>10</span><span>)</span><span>+</span><span>@SQL</span><span>+</span><span>char</span><span>(</span><span>13</span><span>))<br></span><span>else</span><span><br> </span><span>begin</span><span><br> </span><span>print</span><span>(</span><span>'</span><span>-----------Begin Restore Database:</span><span>'</span><span>+</span><span>@dbname</span><span>+</span><span>'</span><span>------------------</span><span>'</span><span>)<br> </span><span>exec</span><span>(</span><span>@DirSQL</span><span>)<br> </span><span>exec</span><span>(</span><span>@SQL</span><span>)<br> </span><span>print</span><span>(</span><span>'</span><span>-----------End Restore Database:</span><span>'</span><span>+</span><span>@dbname</span><span>+</span><span>'</span><span>---------------------</span><span>'</span><span>+</span><span>char</span><span>(</span><span>13</span><span>))<br> </span><span>end</span><span><br><br> </span><span>close</span><span> db_file<br> </span><span>deallocate</span><span> db_file<br><br>ExitFLag:<br></span><span>set</span><span> nocount </span><span>off</span><span><br></span><span>end</span></span></span>
Copy after login
批量还原数据库：
<span>Use</span><span> master<br></span><span>GO</span><span><br></span><span>/*</span><span>=================Usp_RestoreMuiteDataBaseFromPath========================<br> =====Restore Mutite DataBase File From a Path ======<br> =====Ken.Guo ======<br> =====2010.9.10 ======<br> =====Version: 2005 & 2008 SQL Server ======<br> =====EXEC Usp_RestoreMuiteDataBaseFromPath 'D:\databack','',0 ======<br> =========================================================================<br></span><span>*/</span><span><br></span><span>CREATE</span><span>PROC</span><span> Usp_RestoreMuiteDataBaseFromPath<br>( </span><span>@DatabBaseBakPath</span><span>nvarchar</span><span>(</span><span>400</span><span>)<br> ,</span><span>@RestoreDataPath</span><span>nvarchar</span><span>(</span><span>400</span><span>)</span><span>=</span><span>''</span><span>--</span><span>RESTORE DATABASE PATH </span><span><br></span><span> ,</span><span>@IsRun</span><span>smallint</span><span>=</span><span>0</span><span>--</span><span> 0 PRINT 1 run </span><span><br></span><span>) <br></span><span>AS</span><span><br></span><span>BEGIN</span><span><br></span><span>set</span><span> nocount </span><span>on</span><span><br></span><span>DECLARE</span><span>@BackUpFileName</span><span>nvarchar</span><span>(</span><span>200</span><span>) <br> ,</span><span>@DbName</span><span>nvarchar</span><span>(</span><span>200</span><span>) <br> ,</span><span>@errorinfo</span><span>nvarchar</span><span>(</span><span>400</span><span>)<br><br></span><span>IF</span><span>not</span><span>exists</span><span>(</span><span>SELECT</span><span>1</span><span> <br> </span><span>FROM</span><span> master.sys.procedures </span><span>WITH</span><span>(NOLOCK) <br> </span><span>WHERE</span><span> <br> name</span><span>=</span><span>N</span><span>'</span><span>Usp_RestoreDataBaseFormPath</span><span>'</span><span> <br> <br> )<br> </span><span>begin</span><span><br> </span><span>Raiserror</span><span>50001</span><span> N</span><span>'</span><span>找不到存储过程SP_RestoreDataBaseFormPath </span><span>'</span><span> <br> </span><span>Goto</span><span> ExitFLag<br> </span><span>end</span><span><br><br></span><span>--</span><span>add path \</span><span><br></span><span>if</span><span> (</span><span>@DatabBaseBakPath</span><span>is</span><span>not</span><span>null</span><span>) </span><span>and</span><span>len</span><span>(</span><span>@DatabBaseBakPath</span><span>)</span><span>></span><span>1</span><span> <br> </span><span>and</span><span> (</span><span>right</span><span>(</span><span>@DatabBaseBakPath</span><span>,</span><span>1</span><span>)</span><span></span><span>'</span><span>\</span><span>'</span><span>)<br> </span><span>set</span><span>@DatabBaseBakPath</span><span>=</span><span>@DatabBaseBakPath</span><span>+</span><span>'</span><span>\</span><span>'</span><span><br><br></span><span>--</span><span>Check Restore Path and Size >1000M</span><span><br></span><span>DECLARE</span><span>@checkdrive</span><span>int</span><span><br></span><span>SET</span><span>@checkdrive</span><span>=</span><span>1</span><span><br> </span><span>EXEC</span><span> master.dbo.Usp_Check_DriveExists </span><span>@RestoreDataPath</span><span>,</span><span>@checkdrive</span><span> OUTPUT<br><br> </span><span>IF</span><span>(</span><span>@checkdrive</span><span></span><span>1</span><span>)<br> </span><span>Goto</span><span> ExitFLag <br> <br></span><span>DECLARE</span><span>@Dir</span><span>TABLE</span><span> <br>( <br> BackDBFileName </span><span>nvarchar</span><span>(</span><span>100</span><span>) <br> ,DEPTH </span><span>int</span><span> <br> ,</span><span>[</span><span>File</span><span>]</span><span>int</span><span> <br>)<br><br></span><span>INSERT</span><span>INTO</span><span>@Dir</span><span>EXEC</span><span> xp_dirtree </span><span>@DatabBaseBakPath</span><span><br> ,</span><span>1</span><span><br> ,</span><span>1</span><span><br><br></span><span>DELETE</span><span>FROM</span><span>@Dir</span><span> <br></span><span>WHERE</span><span>charindex</span><span>(</span><span>'</span><span>.bak</span><span>'</span><span>,BackDBFileName)</span><span>=</span><span>0</span><span><br><br></span><span>if</span><span>not</span><span>exists</span><span> (</span><span>select</span><span>top</span><span>1</span><span>1</span><span>from</span><span>@Dir</span><span>)<br> </span><span>begin</span><span><br> </span><span>Raiserror</span><span>50001</span><span> N</span><span>'</span><span>在提供的路径下没有找到合符要求的备份文件</span><span>'</span><span> <br> </span><span>Goto</span><span> ExitFLag<br> </span><span>end</span><span><br><br></span><span>declare</span><span> db_file </span><span>Cursor</span><span> Local Static Read_Only Forward_Only<br></span><span>for</span><span><br></span><span>select</span><span> BackDBFileName </span><span>from</span><span>@Dir</span><span><br><br></span><span>Open</span><span> db_file<br></span><span>Fetch</span><span>Next</span><span>from</span><span> db_file </span><span>into</span><span>@BackUpFileName</span><span><br></span><span>while</span><span>@@FETCH_STATUS</span><span>=</span><span>0</span><span><br> </span><span>begin</span><span><br> </span><span>--</span><span>Restore DataBase</span><span><br></span><span>set</span><span>@BackUpFileName</span><span>=</span><span>@DatabBaseBakPath</span><span>+</span><span>@BackUpFileName</span><span><br> </span><span>exec</span><span> master.dbo.Usp_RestoreDataBaseFormPath </span><span>@BackUpFileName</span><span>,</span><span>@RestoreDataPath</span><span>,</span><span>@IsRun</span><span><br> </span><span>Fetch</span><span>Next</span><span>from</span><span> db_file </span><span>into</span><span>@BackUpFileName</span><span><br> </span><span>end</span><span><br></span><span>Close</span><span> db_file<br></span><span>deallocate</span><span> db_file<br><br>ExitFLag:<br></span><span>set</span><span> nocount </span><span>off</span><span><br></span><span>end</span>
Copy after login
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Assassin's Creed Shadows: Seashell Riddle Solution
3 weeks ago
By DDD
What's New in Windows 11 KB5054979 & How to Fix Update Issues
2 weeks ago
By DDD
Where to find the Crane Control Keycard in Atomfall
3 weeks ago
By DDD
Saving in R.E.P.O. Explained (And Save Files)
1 months ago
By 尊渡假赌尊渡假赌尊渡假赌
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
CakePHP Tutorial
1386
52
1386
52
How to use MySQL backup and restore in PHP?
Jun 03, 2024 pm 12:19 PM
Backing up and restoring a MySQL database in PHP can be achieved by following these steps: Back up the database: Use the mysqldump command to dump the database into a SQL file. Restore database: Use the mysql command to restore the database from SQL files.
What is the difference between mysql and sqlserver syntax
Apr 22, 2024 pm 06:33 PM
The syntax differences between MySQL and SQL Server are mainly reflected in database objects, data types, SQL statements and other aspects. Database object differences include the storage engine and how filegroups are specified, and the creation of indexes and constraints. Data type differences involve differences in numeric types, character types, and date and time types. SQL statement differences are reflected in result set limitations, data insertion, update and delete operations, etc. Other differences include how identity columns, views, and stored procedures are created. Understanding these differences is important to avoid errors when using different database systems.
How does Hibernate implement polymorphic mapping?
Apr 17, 2024 pm 12:09 PM
Hibernate polymorphic mapping can map inherited classes to the database and provides the following mapping types: joined-subclass: Create a separate table for the subclass, including all columns of the parent class. table-per-class: Create a separate table for subclasses, containing only subclass-specific columns. union-subclass: similar to joined-subclass, but the parent class table unions all subclass columns.
iOS 18 adds a new 'Recovered' album function to retrieve lost or damaged photos
Jul 18, 2024 am 05:48 AM
Apple's latest releases of iOS18, iPadOS18 and macOS Sequoia systems have added an important feature to the Photos application, designed to help users easily recover photos and videos lost or damaged due to various reasons. The new feature introduces an album called "Recovered" in the Tools section of the Photos app that will automatically appear when a user has pictures or videos on their device that are not part of their photo library. The emergence of the "Recovered" album provides a solution for photos and videos lost due to database corruption, the camera application not saving to the photo library correctly, or a third-party application managing the photo library. Users only need a few simple steps
Where is the navicat database file?
Apr 23, 2024 am 10:57 AM
The location where the Navicat database configuration files are stored varies by operating system: Windows: The user-specific path is %APPDATA%\PremiumSoft\Navicat\macOS: The user-specific path is ~/Library/Application Support/Navicat\Linux: The user-specific path is ~/ .config/navicat\The configuration file name contains the connection type, such as navicat_mysql.ini. These configuration files store database connection information, query history, and SSH settings.
Detailed tutorial on establishing a database connection using MySQLi in PHP
Jun 04, 2024 pm 01:42 PM
How to use MySQLi to establish a database connection in PHP: Include MySQLi extension (require_once) Create connection function (functionconnect_to_db) Call connection function ($conn=connect_to_db()) Execute query ($result=$conn->query()) Close connection ( $conn->close())
How to handle database connection errors in PHP
Jun 05, 2024 pm 02:16 PM
To handle database connection errors in PHP, you can use the following steps: Use mysqli_connect_errno() to obtain the error code. Use mysqli_connect_error() to get the error message. By capturing and logging these error messages, database connection issues can be easily identified and resolved, ensuring the smooth running of your application.
An in-depth analysis of how HTML reads the database
Apr 09, 2024 pm 12:36 PM
HTML cannot read the database directly, but it can be achieved through JavaScript and AJAX. The steps include establishing a database connection, sending a query, processing the response, and updating the page. This article provides a practical example of using JavaScript, AJAX and PHP to read data from a MySQL database, showing how to dynamically display query results in an HTML page. This example uses XMLHttpRequest to establish a database connection, send a query and process the response, thereby filling data into page elements and realizing the function of HTML reading the database.
