ql server 提取汉字/数字/字母的方法
--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
--测试
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
--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
SELECT * FROM (select ‘ASDKG論壇K联通DL‘ as col)TB WHERE COL LIKE N‘%[吖-咗]%‘
原文：http://www.cnblogs.com/accumulater/p/6962259.html