【叶子函数分享九】根据字符分割字符串的三种写法

go

--创建函数(第一版)

create function [dbo].[m_split](@c varchar(2000),@split varchar(2))

returns @t table(col varchar(200))

as

begin

while(charindex(@split,@c)<>0)

begin

insert @t(col) values (substring(@c,1,charindex(@split,@c)-1))

set @c = stuff(@c,1,charindex(@split,@c),'')

end

insert @t(col) values (@c)

return

end

--下面两种是在论坛看到高手们发的

go

--创建函数(第二版)(fredrickhu(小F))

create function [dbo].[f_split](@s varchar(8000), @split varchar(10) )

returns table

as

return

(select substring(@s,number,charindex(@split,@s+@split,number)-number)as col

from master..spt_values

where type='p' and number<=len(@s+'a')

and charindex(@split,@split+@s,number)=number)

go

--创建函数(第三版)(dawugui(爱新觉罗.毓华))

create function [dbo].[d_split] (@inputstr varchar(8000),@seprator varchar(10))

returns @temp table (a varchar(200))

as

begin

declare @i int

set @inputstr = rtrim(ltrim(@inputstr))

set @i = charindex(@seprator, @inputstr)

while @i >= 1

begin

insert @temp values(left(@inputstr, @i - 1))

set @inputstr = substring(@inputstr, @i + 1, len(@inputstr) - @i)

set @i = charindex(@seprator, @inputstr)

end

if @inputstr <> '/'

insert @temp values(@inputstr)

return

end

--测试示例

declare @sql varchar(20)

set @sql='A,B,C,D,E'

select * from dbo.m_split(@sql,',')

select * from dbo.f_split(@sql,',')

select * from dbo.d_split(@sql,',')

--运行结果(结果是相同的)

/*

col

---------

A

B

C

D

E

*/

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