作业帮SQL语句 怎么获取第一个逗号到第二个逗号之间或者第二个逗号到第三个逗号之间的字符串比如‘abcd,1234,ABCD,efg’获取 1234或者ABCD还有‘abcd,1234,ABCD,5678’ 获得5678的
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SQL语句 怎么获取第一个逗号到第二个逗号之间或者第二个逗号到第三个逗号之间的字符串比如‘abcd,1234,ABCD,efg’获取 1234或者ABCD还有‘abcd,1234,ABCD,5678’ 获得5678的
SQL语句 怎么获取第一个逗号到第二个逗号之间或者第二个逗号到第三个逗号之间的字符串
比如‘abcd,1234,ABCD,efg’获取 1234或者ABCD
还有‘abcd,1234,ABCD,5678’ 获得5678的
SQL语句 怎么获取第一个逗号到第二个逗号之间或者第二个逗号到第三个逗号之间的字符串比如‘abcd,1234,ABCD,efg’获取 1234或者ABCD还有‘abcd,1234,ABCD,5678’ 获得5678的
Create FUNCTION [dbo].UFN_SubIndex
(
@p_value nvarchar(100),
@p_split nvarchar(1)=',',
@p_index int
)
RETURNS nvarchar(50)
AS
Begin
DECLARE @CurrentIndex int;
DECLARE @Length int;
DECLARE @NextIndex int;
DECLARE @ReturnText nvarchar(50);
Set @CurrentIndex=1;
Set @NextIndex=@p_index
Set @Length=LEN(@p_value)
if @p_index<0
set @p_index=0;
WHILE(@CurrentIndex<=@Length and @p_index>=0)
BEGIN
set @NextIndex=charindex(@p_split,@p_value,@CurrentIndex);
set @p_index =@p_index-1;
IF(@NextIndex=0 OR @NextIndex IS NULL)
Begin
set @NextIndex=@Length+1;
set @ReturnText=substring(@p_value,@CurrentIndex,@NextIndex-@CurrentIndex);
set @CurrentIndex=@NextIndex+1;
End
Else
Begin
set @NextIndex=@NextIndex;
set @ReturnText=substring(@p_value,@CurrentIndex,@NextIndex-@CurrentIndex);
set @CurrentIndex=@NextIndex+1;
End
END
RETURN @ReturnText;
End
GO
select dbo.UFN_SubIndex('abcd,1234,ABCD,efg', ',', 2)
select dbo.UFN_SubIndex('abcd,1234,ABCD,5678', ',', 3)