go
--创建函数(作者:csdn邹建)
create function getstrofindex (@str varchar(8000),@index int =0)
returns varchar(8000)
as
begin
declare @str_return varchar(8000)
declare @start int
declare @next int
declare @location int
select @start =1
select @next =1 --如果习惯从开始则select @next =0
select @location = charindex(',',@str,@start)
while (@location <>0 and @index > @next )
begin
select @start = @location +1
select @location = charindex(',',@str,@start)
select @next =@next +1
end
if @location =0 select @location =len(@str)+1 --如果是因为没有逗号退出,则认为逗号在字符串后
select @str_return = substring(@str,@start,@location -@start) --@start肯定是逗号之后的位置或者就是初始值
if (@index <> @next ) select @str_return = '' --如果二者不相等,则是因为逗号太少,或者@index小于@next的初始值
[MSSQL]获取指定索引的值的函数
最新推荐文章于 2025-08-15 16:04:36 发布