Home Database Mysql Tutorial sql中查询数据库大小多种方法

sql中查询数据库大小多种方法

Jun 07, 2016 pm 05:49 PM
name nbsp quot str varchar

本文章收藏了几种关于sql中查询数据库大小多种方法

第一种:(蟋蟀)

 代码如下 复制代码

ALTER TABLE tb   (指定某表的某列)
ALTER COLUMN colname nvarchar(100) COLLATE Chinese_PRC_CI_AS           --不区分大小写

ALTER TABLE tb   (指定某表的某列)
ALTER COLUMN colname nvarchar(100) COLLATE Chinese_PRC_CS_AS          --区分大小写

alter database COLLATE Chinese_PRC_CS_AS  (指定整个数据库)

第二种:(tree)

 代码如下 复制代码

--创建如下用户自定义函数(UDF)

CREATE FUNCTION StrComp(@Str1 VARCHAR(50),@Str2 VARCHAR(50))
--ALTER FUNCTION StrComp(@Str1 VARCHAR(50),@Str2 VARCHAR(50))
RETURNS INTEGER
AS
BEGIN
  DECLARE @i INTEGER
  --DECLARE @Str1 VARCHAR(50)
  --DECLARE @Str2 VARCHAR(50)
  DECLARE @y INT
  --SET @Str1='a'
  --SET @Str2='A'
  SET  @i=0
  --SELECT ASCII(SUBSTRING(@Str1,@i+1,1))
  SET @y=1
  DECLARE @iLen INT
  SET @iLen = LEN(LTRIM(RTRIM(@Str1)))
  IF LEN(LTRIM(RTRIM(@Str1)))      SET @iLen = LEN(LTRIM(RTRIM(@Str2)))
  WHILE (@i     BEGIN
      IF (ASCII(SUBSTRING(@Str1,@i+1,1))=ASCII(SUBSTRING(@Str2,@i+1,1))) --THEN
         SET @i = @i +1
      ELSE
         BEGIN
           SET @y=0
           BREAK
         END
      END
     RETURN @y
END

测试:
select *
from Table1
Where dbo.StrComp(Field1,'aAbB') =1

第三种:(Oliver)
SQL Server 数据库中的文本信息可以用大写字母、小写字母或二者的组合进行存储。例如,姓氏可以"SMITH"、"Smith"或"smith"等形式出现。

数据库是否区分大小写取决于 SQL Server 的安装方式。如果数据库区分大小写,当搜索文本数据时,必须用正确的大小写字母组合构造搜索条件。例如,如果搜索名字"Smith",则不能使用搜索条件"=smith"或"=SMITH"。

另外,如果服务器被安装成区分大小写,则必须用正确的大小写字母组合提供数据库、所有者、表和列的名称。如果提供的名称大小写不匹配,则 SQL Server 返回错误,报告"无效的对象名"。

当使用关系图窗格和网格窗格创建查询时,查询设计器始终正确地反映出服务器是否区分大小写。但是,如果在 SQL 窗格中输入查询,则必须注意使名称与服务器解释名称的方式相匹配。

如果服务器是用不区分大小写的选项安装的,则
提示   若要确定服务器是否区分大小写,请执行存储过程 sp_server_info,然后检查第 18 行的内容。如果服务器是用不区分大小写的设置安装的,则 sort_order 选项将设置为"不区分大小写"。可以从查询分析器运行存储过程。

第四种:(非云)

 代码如下 复制代码
select * from servers where convert(varbinary, name)=convert(varbinary, N'RoCKEY')

第五种:()

 代码如下 复制代码
ascii('a')再配合Substring()一起用

 

第五种,

 代码如下 复制代码

SELECT DB_NAME(database_id) AS [Database Name],[Name] AS [Logical Name],[Physical_Name] AS [Physical Name],((size * 8) / 1024) AS [Size(MB)],[differential_base_time] AS [Differential Base Time]
FROM sys.master_files
WHERE DB_NAME(database_id) IN('XXX')

GO

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