【SQL】找出行数与自增标识值不相等的表（即有缺行）

原文: 【SQL】找出行数与自增标识值不相等的表（即有缺行）

环境：mssql ent 2k8 r2

原理：遍历所有含自增列的用户表，用sp_spaceused过程分别获取每张表的行数并写入临时表，然后使用IDENT_CURRENT函数获取表的最大标识值，比较二者并返回结果

IF OBJECT_ID('tempdb..#TableRowCount','U') IS NOT NULL DROP TABLE #TableRowCount GO

CREATE TABLE #TableRowCount (Name sysname PRIMARY KEY, RowCnt DECIMAL(11,0), Reserved VARCHAR(18), Data VARCHAR(18), Index_Size VARCHAR(18), Unused VARCHAR(18)) GO

DECLARE curCntAllTableRows CURSOR LOCAL FAST_FORWARD FOR

        SELECT name FROM sys.tables WHERE OBJECTPROPERTY(object_id,'TableHasIdentity')=1

OPEN curCntAllTableRows DECLARE @TableName sysname FETCH NEXT FROM curCntAllTableRows INTO @TableName

WHILE @@FETCH_STATUS=0

BEGIN

 INSERT INTO #TableRowCount EXEC sys.sp_spaceused @TableName

 FETCH NEXT FROM curCntAllTableRows INTO @TableName

END

CLOSE curCntAllTableRows DEALLOCATE curCntAllTableRows /*由于IDENT_CURRENT对于空表也会返回1，所以做特别处理*/

WITH cteA AS ( SELECT Name,RowCnt,CASE IDENT_CURRENT(Name) WHEN 1 THEN RowCnt ELSE IDENT_CURRENT(Name) END AS 'CurrID'

FROM #TableRowCount ) SELECT Name,RowCnt,CurrID FROM cteA WHERE RowCnt<>CurrID

文毕。