sql 提取数字、字母、汉字

1.提取数字

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

2.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

3.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-咗]%',@S),1,N'')
   RETURN @S
END
GO