SQLServer常用代码段
几个常用的SQLServer语句 无 ------------------------------------------------------------------------GO--查询库中表的行数 打印大于0行的表名和行数DECLARE @TableName VARCHAR(128)Declare PostCur Cursor For SELECT name FROM sys.tables Open PostCu
几个常用的SQLServer语句------------------------------------------------------------------------ GO --查询库中表的行数 打印大于0行的表名和行数 DECLARE @TableName VARCHAR(128) Declare PostCur Cursor For SELECT name FROM sys.tables Open PostCur Fetch next From PostCur Into @TableName While @@fetch_status=0 Begin DECLARE @ct INT SET @ct=0 DECLARE @strSQL NVARCHAR(500) SET @strSQL='Select @ct=Count(1) From '+@TableName exec sp_executesql @strSQL,N'@ct int output',@ct OUTPUT IF(@ct>0) BEGIN print '表名 '+@TableName PRINT '数据条数 '+Convert(varchar(32),@ct) END Fetch next From PostCur Into @TableName End Close PostCur Deallocate PostCur ---------------------------------------- --查询数据库总各表数据量 GO CREATE TABLE #tbles(ID int IDENTITY(1,1),TableName varchar(128) ,IsHandle bit DEFAULT('False') ,TableRowCount int DEFAULT(0)) INSERT INTO #tbles(TableName) SELECT name FROM sys.tables DECLARE @TableName varchar(128) DECLARE @ID int SET @ID=0 SELECT TOP 1 @ID=ID,@TableName=TableName FROM #tbles WHERE IsHandle='False' WHILE(@ID!=0) BEGIN DECLARE @isexists bit DECLARE @RowCount int DECLARE @SqlStr nvarchar(1000) SET @SqlStr='SELECT @RowCount=Count(1) FROM '+@TableName exec sp_executesql @SqlStr ,N'@RowCount int output',@RowCount OUTPUT UPDATE #tbles SET IsHandle='True',TableRowCount=@RowCount WHERE TableName=@TableName Print @RowCount PRINT @TableName SET @ID=0 SET @RowCount=0 SET @SqlStr='' SELECT TOP 1 @ID=ID,@TableName=TableName FROM #tbles WHERE IsHandle='False' END SELECT * FROM #tbles Drop Table #tbles ------------------------------------------------------------------------ ---查询存储过程返回结果 GO create proc getdata2 as select 1 as r1,2 as r2 GO create table #temp(r1 int,r2 int) insert into #temp exec getdata2 select * From #temp drop table #temp ------------------------------------------------------------------------ ----查询生成拼接字符串 Go create table #temp1(c1 int) insert into #temp1(c1)Values(1) insert into #temp1(c1)Values(2) insert into #temp1(c1)Values(3) insert into #temp1(c1)Values(4) GO Select c1 From #temp1 for xml path('') Select c1 as [data()] From #temp1 for xml path('') Select Convert(varchar(10),c1) +',' From #temp1 for xml path('') declare @str varchar(max) select @str=(Select Convert(varchar(10),c1) +',' From #temp1 for xml path('')) select @str ------------------------------------------------------------------------ --获取随机字符串 GO CREATE VIEW [dbo].[V_RAND] AS SELECT RAND1 = CONVERT(INT,RAND()*26),RAND2 = RAND()*2 GO Create FUNCTION [dbo].[f_GetRandStr](@LEN INT,@FLAG INT) RETURNS NVARCHAR(100) AS --@LEN 输出字符的长度 --@FLAG 返回值包含字符 1:大写字母 2:小写字母 3:大小写字母混合 BEGIN DECLARE @SQL NVARCHAR(100),@RAND INT SELECT @SQL = '' IF @LEN>100 SET @LEN = 100 WHILE @LEN>0 BEGIN SELECT @RAND = RAND1 +(CASE @FLAG WHEN 1 THEN 65 WHEN 2 THEN 97 ELSE(CASE WHEN RAND2 > 1 THEN 97 ELSE 65 END) END) FROM V_RAND SELECT @SQL=@SQL + CHAR(@RAND),@LEN = @LEN - 1 END RETURN @SQL END GO Select dbo.f_GetRandStr(30,3) ---------------------------------------- --简单的传参输出 GO declare @i3 int exec sp_executesql N'Select @i3=@i1+@i2',N'@i1 int,@i2 int,@i3 int output',1,22,@i3 output Select @i3

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For objects with the same name that already exist in the SQL Server database, the following steps need to be taken: Confirm the object type (table, view, stored procedure). IF NOT EXISTS can be used to skip creation if the object is empty. If the object has data, use a different name or modify the structure. Use DROP to delete existing objects (use caution, backup recommended). Check for schema changes to make sure there are no references to deleted or renamed objects.

The import steps are as follows: Copy the MDF file to SQL Server's data directory (usually C:\Program Files\Microsoft SQL Server\MSSQL\DATA). In SQL Server Management Studio (SSMS), open the database and select Attach. Click the Add button and select the MDF file. Confirm the database name and click the OK button.

When the SQL Server service fails to start, here are some steps to resolve: Check the error log to determine the root cause. Make sure the service account has permission to start the service. Check whether dependency services are running. Disable antivirus software. Repair SQL Server installation. If the repair does not work, reinstall SQL Server.

To view the SQL Server port number: Open SSMS and connect to the server. Find the server name in Object Explorer, right-click it and select Properties. In the Connection tab, view the TCP Port field.

If you accidentally delete a SQL Server database, you can take the following steps to recover: stop database activity; back up log files; check database logs; recovery options: restore from backup; restore from transaction log; use DBCC CHECKDB; use third-party tools. Please back up your database regularly and enable transaction logging to prevent data loss.

SQL Server database files are usually stored in the following default location: Windows: C:\Program Files\Microsoft SQL Server\MSSQL\DATALinux: /var/opt/mssql/data The database file location can be customized by modifying the database file path setting.

If the SQL Server installation fails, you can clean it up by following these steps: Uninstall SQL Server Delete registry keys Delete files and folders Restart the computer

SQL Server English installation can be changed to Chinese by following the following steps: download the corresponding language pack; stop the SQL Server service; install the language pack; change the instance language; change the user interface language; restart the application.
