sqlsever 字符串分割函数

sql字符串分割函数

源地址：https://www.jb51.net/article/28921.htm

https://www.cnblogs.com/aierong/archive/2008/11/19/sqlserver_split.html

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[SplitString]') and xtype in (N'FN', N'IF', N'TF'))
drop function [dbo].[SplitString]
GO
SET ANSI_NULLS ON 
GO 
SET QUOTED_IDENTIFIER ON 
GO 
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(@Entry) 
end 
set @Input = substring(@Input, @Index+datalength(@Separator)/2, len(@Input)) 
set @Index = charindex(@Separator, @Input) 
end 
set @Entry=ltrim(rtrim(@Input)) 
if (@RemoveEmptyEntries=0) or (@RemoveEmptyEntries=1 and @Entry<>'') 
begin 
insert into @TABLE([Value]) Values(@Entry) 
end 
return 
end

GO