[MSSQL]实现SQL Server中的切割字符串SplitString标量函数

 

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO


/*
by kudychen 2011-9-28 
*/
CREATE function [dbo].[SplitString]
(
    @Input nvarchar(max), --input string to be separated
    @Separator nvarchar(max)=',', --a string that delimit the substrings in the input string
    @RemoveEmptyEntries bit=1 --the return value does not include array elements that contain an empty string
)
returns @TABLE table 
(
    [Id] int identity(1,1),
    [Value] nvarchar(max)
) 
as
begin 
    declare @Index int, @Entry nvarchar(max)
    set @Index = charindex(@Separator,@Input)

    while (@Index>0)
    begin
        set @Entry=ltrim(rtrim(substring(@Input, 1, @Index-1)))
        
        if (@RemoveEmptyEntries=0) or (@RemoveEmptyEntries=1 and @Entry<>'')
            begin
                insert into @TABLE([Value]) Values(@