CREATE PROCEDURE dbo.SystemFuntion_HasBeUsed

@PTableName Varchar(100), --要检查数据是否被使用的主键表名称

@PKValue INT, --主键字段的值

@IsUsed INT OUTPUT

AS

DECLARE @TableName VARCHAR(100) --外键表的名称

DECLARE @FKName VARCHAR(100) --外键字段名称

DECLARE @FKey INT

DECLARE @SQL VARCHAR(8000)

SET @sql = 'SELECT 0 as colCount into #tempTableCol UNION '

DECLARE cursorFKTable CURSOR FOR

SELECT b.[name] AS TableName , a.fkey

FROM sysforeignkeys a INNER JOIN sysobjects b on a.fkeyid=b.[id] INNER JOIN sysobjects c on a.rkeyid=c.[id]

WHERE c.[name]=@PTableName

OPEN cursorFKTable

FETCH NEXT FROM cursorFKTable INTO @TableName,@FKey

WHILE @@FETCH_STATUS = 0

BEGIN

SELECT @FKName = a.[name] FROM syscolumns a INNER join sysobjects b ON a.[id]=b.[id] WHERE b.[name]=@TableName and @FKey=a.colid

SET @sql = @sql + 'SELECT CASE WHEN COUNT(*)=0 THEN 0 ELSE 1 END FROM ' + @TableName +' WHERE ' + @FKName + '=' + CAST(@PKValue AS VARCHAR(100))

SET @sql = @sql + ' UNION '

FETCH NEXT FROM cursorFKTable INTO @TableName,@FKey

END

CLOSE cursorFKTable

DEALLOCATE cursorFKTable

SELECT @sql = left(@sql,len(@sql)-6)

exec(@sql)

SELECT @IsUsed = @@ROWCOUNT-1

GO

使用方法：

/***********获取当前主键值是否被其他表使用过(@HasPKValueBeUsed as HasPKValueBeUsed)*************/

DECLARE @HasPKValueBeUsed INT

EXECUTE SystemFuntion_HasBeUsed 'TLSubjectPlan',@SubjectPlanID,@IsUsed=@HasPKValueBeUsed OUTPUT

/*******************************************************************************/