SQL Server数据库中拆分字符串函数的具体方法:
CREATE FUNCTION uf_StrSplit '1.1.2.50','.'
(@origStr varchar(7000), --待拆分的字符串
@markStr varchar(100)) --拆分标记,如','
RETURNS @splittable table
(
str_id varchar(4000) NOT NULL, --编号ID
string varchar(2000) NOT NULL --拆分后的字符串
)
AS
BEGIN
declare @strlen int,@postion int,@start int,@sublen int,
@TEMPstr varchar(200),@TEMPid int
SELECT @strlen=LEN(@origStr),@start=1,@sublen=0,@postion=1,
@TEMPstr=",@TEMPid=0
if(RIGHT(@origStr,1)<>@markStr )
begin
set @origStr = @origStr + @markStr
end
WHILE((@postion<=@strlen) and (@postion !=0))
BEGIN
IF(CHARINDEX(@markStr,@origStr,@postion)!=0)
BEGIN
SET @sublen=CHARINDEX(@markStr,@origStr,@postion)-@postion;
END
ELSE
BEGIN
SET @sublen=@strlen-@postion+1;
END
IF(@postion<=@strlen)
BEGIN
SET @TEMPid=@TEMPid+1;
SET @TEMPstr=SUBSTRING(@origStr,@postion,@sublen);
INSERT INTO @splittable(str_id,string)
values(@TEMPid,@TEMPstr)
IF(CHARINDEX(@markStr,@origStr,@postion)!=0)
BEGIN
SET @postion=CHARINDEX(@markStr,@origStr,@postion)+1
END
ELSE
BEGIN
SET @postion=@postion+1
END
END
END
RETURN
END
例如:select * from uf_StrSplit('1,1,2,50′,’,')
输出结果:
str_id string
1 1
2 1
3 2
4 50
上文中涉及到很多的字符,对于一些初学者来说,可能是比较难理解,但是这个知识点确实是经常会用到的,而且相当实用,希望大家好好学习,争取能熟练的掌握。