其功能为: 将字符串如'1,2,3,4,5,6' 拼接成SQL里面的id 1:使用: select * from Student where id IN( SELECT * FROM dbo.F_SPLIT('1,2,3,4',',') ) 2:定义表值函数: USE [CRM_CN2] GO /****** Object: UserDefinedFunction [dbo].[F_SPLIT] ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER