在SQL Server數(shù)據(jù)庫中拆分字符串函數(shù)
SQL Server數(shù)據(jù)庫中拆分字符串函數(shù)的具體方法:
CREATE FUNCTION uf_StrSplit '1.1.2.50','.'
(@origStr varchar(7000), --待拆分的字符串
@markStr varchar(100)) --拆分標(biāo)記,如','
RETURNS @splittable table
(
str_id varchar(4000) NOT NULL, --編號(hào)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',',')
輸出結(jié)果:
str_id string
1 1
2 1
3 2
4 50
上文中涉及到很多的字符,對(duì)于一些初學(xué)者來說,可能是比較難理解,但是這個(gè)知識(shí)點(diǎn)確實(shí)是經(jīng)常會(huì)用到的,而且相當(dāng)實(shí)用,希望大家好好學(xué)習(xí),爭取能熟練的掌握。
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