SQL Server 中查询数据库的大小和数据库中各表的大小

转载于：https://blog.csdn.net/keenx/article/details/485114

其实只要使用系统内置的存储过程sp_spaceused就可以得到表的相关信息

如：sp_spaceused 'tablename'

以下是为了方便写的一个存储过程，目的是把当前的所有表的相关信息全部都保存在一个指定的表里面。

CREATE TABLE #tablespaceinfo
    (
      nameinfo VARCHAR(500) ,
      rowsinfo BIGINT ,
      reserved VARCHAR(20) ,
      datainfo VARCHAR(20) ,
      index_size VARCHAR(20) ,
      unused VARCHAR(20)
    );  
  
DECLARE @tablename VARCHAR(255);  
  
DECLARE Info_cursor CURSOR
FOR
    SELECT  '[' + [name] + ']'
    FROM    sys.tables
    WHERE   type = 'U';  
  
OPEN Info_cursor;  
FETCH NEXT FROM Info_cursor INTO @tablename;  
  
WHILE @@FETCH_STATUS = 0
    BEGIN 
        INSERT  INTO #tablespaceinfo
                EXEC sp_spaceused @tablename;  
        FETCH NEXT FROM Info_cursor  
    INTO @tablename;  
    END; 
  
CLOSE Info_cursor;  
DEALLOCATE Info_cursor;  
  
--创建临时表
CREATE TABLE [#tmptb]
    (
      TableName NVARCHAR(MAX) ,
      DataInfo BIGINT ,
      RowsInfo BIGINT ,
      Spaceperrow AS ( CASE RowsInfo
                         WHEN 0 THEN 0
                         ELSE CAST(DataInfo AS DECIMAL(18, 2)) / CAST(RowsInfo AS DECIMAL(18, 2))
                       END ) PERSISTED
    );
 
--插入数据到临时表
INSERT  INTO [#tmptb]
        ( [TableName] ,
          [DataInfo] ,
          [RowsInfo]
        )
        SELECT  [nameinfo] ,
                CAST(REPLACE([datainfo], 'KB', '') AS BIGINT) AS 'datainfo' ,
                [rowsinfo]
        FROM    #tablespaceinfo
        ORDER BY CAST(REPLACE(reserved, 'KB', '') AS INT) DESC;  
 
 
--汇总记录
SELECT  [tbspinfo].* ,
        [tmptb].[Spaceperrow] AS '每行记录大概占用空间（KB）'
FROM    [#tablespaceinfo] AS tbspinfo ,
        [#tmptb] AS tmptb
WHERE   [tbspinfo].[nameinfo] = [tmptb].[TableName]
ORDER BY CAST(REPLACE([tbspinfo].[reserved], 'KB', '') AS INT) DESC;  
 
DROP TABLE [#tablespaceinfo];
DROP TABLE [#tmptb];