Sqlserver表值函数来获取逗号分隔的ID

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 ON
GO
 =============================================
 Author:        zrf
 Create date:   2019 09 10
 Description:   将表中字段pid:里面的值 如："12,33,15,36,889"  -->转换成一张表
 =============================================
ALTER  FUNCTION [dbo].[F_SPLIT]
(
    @SourceSql nvarchar(4000),
    @StrSeprate varchar(10)
)
RETURNS @temp TABLE(Temp_Field nvarchar(2000))

AS
BEGIN
        declare @i int
        set @SourceSql = rtrim(ltrim(@SourceSql))
        
        set @i = charindex(@StrSeprate, @SourceSql)
        while @i >= 1
        begin
            insert @temp values(left(@SourceSql, @i - 1))
            set @SourceSql = substring(@SourceSql, @i + 1, len(@SourceSql) - @i)
            set @i = charindex(@StrSeprate, @SourceSql)
        end
        if @SourceSql <> '\'
            insert @temp values(@SourceSql)
        RETURN
    END