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  • sql获取数组指定元素

    需求:获取字符数组1,2,3的第2个元素

    方法:通过自定义函数来实现

    /*
           获取字符串数组某个元素
    */
    if exists (select 1 from sysobjects where id = object_id('Get_StrArrayStrOfIndex' ))
       drop Function Get_StrArrayStrOfIndex
    go
    create function Get_StrArrayStrOfIndex
    (
      @str varchar(5000 ),   -- 要分割的字符串
      @split varchar(10 ),   -- 分隔符号
      @index int                   --取第几个元素
    )
    returns varchar (5000)
    as
    begin
           declare @location int
           declare @start int
           declare @next int
           declare @seed int
    
           set @str =ltrim( rtrim(@str ))
           set @start =1
           set @next =1
           set @seed =len( @split)
    
           set @location =charindex( @split,@str )
           while @location <>0 and @index> @next
           begin
                 set @start =@location+ @seed
                 set @location =charindex( @split,@str ,@start)
                 set @next =@next+ 1
           end
          
           if @location =0
                 select @location =len (@str)+ 1
                
           return substring (@str, @start,@location -@start)
    end
    GO

    用法:

    print dbo.Get_StrArrayStrOfIndex('1,2,3',',',2)
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  • 原文地址:https://www.cnblogs.com/xqhppt/p/4377746.html
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