--引用
CREATE FUNCTION dbo.f_hex_dec(@s varchar(16))
RETURNS bigint
AS
BEGIN
DECLARE @i int,@result bigint
SELECT @i=0,@result=0,@s=RTRIM(LTRIM(UPPER(REVERSE(@s))))
WHILE @i <LEN(@s)
BEGIN
IF SUBSTRING(@s,@i+1,1) not between '0 ' and '9 ' and SUBSTRING(@s,@i+1,1) not between 'A ' and 'F '
BEGIN
SELECT @result=0
break
END
SELECT @result=@result+(CHARINDEX(SUBSTRING(@s,@i+1,1), '0123456789ABCDEF ')-1)*POWER(16,@i),@i=@i+1
END
RETURN @result
END
GO
--
select dbo.f_hex_dec( 'A ')
--res
10
