数据

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