--创建16进制转换字符串函数 CREATE function fn_hex_to_char ( @x varbinary(100), -- binary hex value @l int -- number of bytes ) returns varchar(200) as -- Written by: Gregory A. Larsen -- Date: May 25, 2004 -- Description: This function will take any binary value and return -- the hex value as a character representation. -- In order to use this function you need to pass the -- binary hex value and the number of bytes you want to -- convert. begindeclare @i varbinary(10) declare @digits char(16) set @digits = '0123456789ABCDEF' declare @s varchar(100) declare @h varchar(100) declare @j int set @j = 0 set @h = '' -- process all bytes while @j < @l begin set @j= @j + 1 -- get first character of byte set @i = substring(cast(@x as varbinary(100)),@j,1) -- get the first character set @s = cast(substring(@digits,@i%16+1,1) as char(1)) -- shift over one character set @i = @i/16 -- get the second character set @s = cast(substring(@digits,@i%16+1,1) as char(1)) + @s -- build string of hex characters set @h = @h + @s end return(@h) end--调用 declare @num varbinary(10) set @num=0x004E select dbo.fn_hex_to_char(@num,2)/* ---------- 004E(所影响的行数为 1 行) */
CREATE function fn_hex_to_char (
@x varbinary(100), -- binary hex value
@l int -- number of bytes
) returns varchar(200)
as
-- Written by: Gregory A. Larsen
-- Date: May 25, 2004
-- Description: This function will take any binary value and return
-- the hex value as a character representation.
-- In order to use this function you need to pass the
-- binary hex value and the number of bytes you want to
-- convert.
begindeclare @i varbinary(10)
declare @digits char(16)
set @digits = '0123456789ABCDEF'
declare @s varchar(100)
declare @h varchar(100)
declare @j int
set @j = 0
set @h = ''
-- process all bytes
while @j < @l
begin
set @j= @j + 1
-- get first character of byte
set @i = substring(cast(@x as varbinary(100)),@j,1)
-- get the first character
set @s = cast(substring(@digits,@i%16+1,1) as char(1))
-- shift over one character
set @i = @i/16
-- get the second character
set @s = cast(substring(@digits,@i%16+1,1) as char(1)) + @s
-- build string of hex characters
set @h = @h + @s
end
return(@h)
end--调用
declare @num varbinary(10)
set @num=0x004E
select dbo.fn_hex_to_char(@num,2)/*
----------
004E(所影响的行数为 1 行)
*/