拆分字符串:教你在SQL Server数据库中拆分字符串函数

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

str_id      string

1             1
2             1
3             2
4            50