SQL Server提取數字、英文、中文的sql語句介紹

這篇文章主要介紹了如何用SQL Server提取數字、英文、中文的sql語句 ,需要的朋友可以參考下。

--SQL 判斷字段值是否有中文

create function fun_getCN(@str nvarchar(4000))

returns nvarchar(4000)

as

begin

declare @word nchar(1),@CN nvarchar(4000)

set @CN=''

while len(@str)>0

begin

set @word=left(@str,1)

if unicode(@word) between 19968 and 19968+20901

set @CN=@CN+@word

set @str=right(@str,len(@str)-1)

end

return @CN

end

select dbo.fun_getCN('ASDKG論壇KDL')

--論壇

select dbo.fun_getCN('ASDKG論壇KDL')

--論壇

select dbo.fun_getCN('ASDKDL')

--空

-------------------------------------

--提取數字

IF OBJECT_ID('DBO.GET_NUMBER2') IS NOT NULL

DROP FUNCTION DBO.GET_NUMBER2

GO

CREATE FUNCTION DBO.GET_NUMBER2(@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

--測試

PRINT DBO.GET_NUMBER('呵呵ABC123ABC')

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

--測試

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

--------------------------------------------------------------------

--過濾重復字符

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

--------------------------------------------------------------------

--過濾重復字符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),   --包含多個數據項的字符串

@INDEX int,       --要獲取的數據項的位置

@SPLIT varchar(10)   --數據分隔符

)

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

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