mssql 字符串中提取数字，英文，中文，过滤重复字符实例

本文章是一篇讲述利用mssql来提取字符串中的所有数字，英文，中文，过滤重复字符实例，有需要的朋友参考一下吧。

代码如下

复制代码

IF OBJECT_ID('DBO.GET_NUMBER') IS NOT NULL DROP FUNCTION DBO.GET_NUMBER GO CREATE FUNCTION DBO.GET_NUMBER(@S VARCHAR(100)) RETURNS VARCHAR(100) AS BEGIN WHILE PATINDEX('%[^0-9]%',@S) > 0 BEGIN set @s=stuff(@s,patindex('%[^0-9]%',@s),1,'') END RETURN @S END GO --测试 PRINT DBO.GET_NUMBER('呵呵ABC-12,3ABC') GO --123 -------------------------------------------------------------------- --提取英文 IF OBJECT_ID('DBO.GET_STR') IS NOT NULL DROP FUNCTION DBO.GET_STR GO CREATE FUNCTION DBO.GET_STR(@S VARCHAR(100)) RETURNS VARCHAR(100) AS BEGIN WHILE PATINDEX('%[^a-z]%',@S) > 0 BEGIN set @s=stuff(@s,patindex('%[^a-z]%',@s),1,'') END RETURN @S END GO --测试 PRINT DBO.GET_STR('呵呵ABC123ABC') GO -------------------------------------------------------------------- --提取中文 IF OBJECT_ID('DBO.CHINA_STR') IS NOT NULL DROP FUNCTION DBO.CHINA_STR GO CREATE FUNCTION DBO.CHINA_STR(@S NVARCHAR(100)) RETURNS VARCHAR(100) AS BEGIN WHILE PATINDEX('%[^吖-座]%',@S) > 0 SET @S = STUFF(@S,PATINDEX('%[^吖-座]%',@S),1,N'') RETURN @S END GO PRINT DBO.CHINA_STR('呵呵ABC123ABC') GO -------------------------------------------------------------------- --过滤重复字符 IF OBJECT_ID('DBO.DISTINCT_STR') IS NOT NULL DROP FUNCTION DBO.DISTINCT_STR GO CREATE FUNCTION DBO.DISTINCT_STR(@S NVARCHAR(100),@SPLIT VARCHAR(50)) RETURNS VARCHAR(100) AS BEGIN IF @S IS NULL RETURN(NULL) DECLARE @NEW VARCHAR(50),@INDEX INT,@TEMP VARCHAR(50) IF LEFT(@S,1)@SPLIT SET @S = @SPLIT+@S IF RIGHT(@S,1)@SPLIT SET @S = @S+@SPLIT WHILE CHARINDEX(@SPLIT,@S)>0 AND LEN(@S)1 BEGIN SET @INDEX = CHARINDEX(@SPLIT,@S) SET @TEMP = LEFT(@S,CHARINDEX(@SPLIT,@S,@INDEX+LEN(@SPLIT))) IF @NEW IS NULL SET @NEW = ISNULL(@NEW,'')+@TEMP ELSE SET @NEW = ISNULL(@NEW,'')+REPLACE(@TEMP,@SPLIT,'')+@SPLIT WHILE CHARINDEX(@TEMP,@S)>0 BEGIN SET @S=STUFF(@S,CHARINDEX(@TEMP,@S)+LEN(@SPLIT),CHARINDEX(@SPLIT,@S,CHARINDEX(@TEMP,@S)+LEN(@SPLIT))-CHARINDEX(@TEMP,@S),'') END END RETURN RIGHT(LEFT(@NEW,LEN(@NEW)-1),LEN(LEFT(@NEW,LEN(@NEW)-1))-1) END GO PRINT DBO.DISTINCT_STR('A,A,B,C,C,B,C,',',') --A,B,C GO -------------------------------------------------------------------- --过滤重复字符2 IF OBJECT_ID('DBO.DISTINCT_STR2') IS NOT NULL DROP FUNCTION DBO.DISTINCT_STR2 GO CREATE FUNCTION DBO.DISTINCT_STR2(@S varchar(8000)) RETURNS VARCHAR(100) AS BEGIN IF @S IS NULL RETURN(NULL) DECLARE @NEW VARCHAR(50),@INDEX INT,@TEMP VARCHAR(50) WHILE LEN(@S)>0 BEGIN SET @NEW=ISNULL(@NEW,'')+LEFT(@S,1) SET @S=REPLACE(@S,LEFT(@S,1),'') END RETURN @NEW END GO SELECT DBO.DISTINCT_STR2('AABCCD') --ABCD GO -------------------------------------------------------------------- IF OBJECT_ID('DBO.SPLIT_STR') IS NOT NULL DROP FUNCTION DBO.SPLIT_STR GO CREATE FUNCTION DBO.SPLIT_STR( @S varchar(8000),      --包含多个数据项的字符串 @INDEX int,             --要获取的数据项的位置 @SPLIT varchar(10)     --数据分隔符 ) RETURNS VARCHAR(100) AS BEGIN IF @S IS NULL RETURN(NULL) DECLARE @SPLITLEN int SELECT @SPLITLEN=LEN(@SPLIT+'A')-2 WHILE @INDEX>1 AND CHARINDEX(@SPLIT,@S+@SPLIT)>0 SELECT @INDEX=@INDEX-1,@S=STUFF(@S,1,CHARINDEX(@SPLIT,@S+@SPLIT)+@SPLITLEN,'') RETURN(ISNULL(LEFT(@S,CHARINDEX(@SPLIT,@S+@SPLIT)-1),'')) END GO PRINT DBO.SPLIT_STR('AA|BB|CC',2,'|') -- GO