หากคุณเป็นเหมือนฉันและคุณเหนื่อยกับการค้นหาตัวละครเหล่านี้ในข้อมูลที่แย่มากของ บริษัท คุณคุณสามารถใช้ฟังก์ชั่นนี้หรือเขียนมันใหม่เพื่อจุดประสงค์ของคุณเอง มันเป็นคำพูดที่ยอมรับได้ แต่มันเป็นขั้นตอนพิเศษในการระบุตัวอักษรพิเศษหากคุณต้องการ - ไม่ใส่เครื่องหมายบรรทัดที่ 19 - 179
หากสตริงไม่มีค่า ascii ที่ไม่สามารถพิมพ์ได้หรือขยายได้ - จะส่งคืนค่า NULL
CREATE FUNCTION [dbo].[Find_Invalid_Chars]
(
@SearchString VARCHAR(8000)
)
RETURNS VARCHAR(8000)
AS
BEGIN
DECLARE @CharPosition INT, @CharVal VARCHAR(100), @ReturnVal VARCHAR(8000) = '', @isValid BIT = 1 -- Start as valid
SET @CharPosition = 1
WHILE @CharPosition <= DATALENGTH(@SearchString)
BEGIN
IF (ASCII(SUBSTRING(@SearchString, @CharPosition, 1)) NOT BETWEEN (32) AND (127))
BEGIN
SET @CharVal = '[' + CAST(ASCII(SUBSTRING(@SearchString, @CharPosition, 1)) AS VARCHAR(3)) + ']'
SET @isValid = 0
---- Non-Printables
--SET @CharVal = REPLACE(@CharVal, '[0]', '[NUL]')
--SET @CharVal = REPLACE(@CharVal, '[1]', '[SOH]')
--SET @CharVal = REPLACE(@CharVal, '[2]', '[STX]')
--SET @CharVal = REPLACE(@CharVal, '[3]', '[ETX]')
--SET @CharVal = REPLACE(@CharVal, '[4]', '[EOT]')
--SET @CharVal = REPLACE(@CharVal, '[5]', '[ENQ]')
--SET @CharVal = REPLACE(@CharVal, '[6]', '[ACK]')
--SET @CharVal = REPLACE(@CharVal, '[7]', '[BEL]')
--SET @CharVal = REPLACE(@CharVal, '[8]', '[BS]')
--SET @CharVal = REPLACE(@CharVal, '[9]', '[HT]')
--SET @CharVal = REPLACE(@CharVal, '[10]', '[LF]')
--SET @CharVal = REPLACE(@CharVal, '[11]', '[VT]')
--SET @CharVal = REPLACE(@CharVal, '[12]', '[FF]')
--SET @CharVal = REPLACE(@CharVal, '[13]', '[CR]')
--SET @CharVal = REPLACE(@CharVal, '[14]', '[SO]')
--SET @CharVal = REPLACE(@CharVal, '[15]', '[SI]')
--SET @CharVal = REPLACE(@CharVal, '[16]', '[DLE]')
--SET @CharVal = REPLACE(@CharVal, '[17]', '[DC1]')
--SET @CharVal = REPLACE(@CharVal, '[18]', '[DC2]')
--SET @CharVal = REPLACE(@CharVal, '[19]', '[DC3]')
--SET @CharVal = REPLACE(@CharVal, '[20]', '[DC4]')
--SET @CharVal = REPLACE(@CharVal, '[21]', '[NAK]')
--SET @CharVal = REPLACE(@CharVal, '[22]', '[SYN]')
--SET @CharVal = REPLACE(@CharVal, '[23]', '[ETB]')
--SET @CharVal = REPLACE(@CharVal, '[24]', '[CAN]')
--SET @CharVal = REPLACE(@CharVal, '[25]', '[EM]')
--SET @CharVal = REPLACE(@CharVal, '[26]', '[SUB]')
--SET @CharVal = REPLACE(@CharVal, '[27]', '[ESC]')
--SET @CharVal = REPLACE(@CharVal, '[28]', '[FS]')
--SET @CharVal = REPLACE(@CharVal, '[29]', '[GS]')
--SET @CharVal = REPLACE(@CharVal, '[30]', '[RS]')
--SET @CharVal = REPLACE(@CharVal, '[31]', '[US]')
---- Extended Ascii
--SET @CharVal = REPLACE(@CharVal, '[128]', '[€]')
--SET @CharVal = REPLACE(@CharVal, '[129]', '[]]')
--SET @CharVal = REPLACE(@CharVal, '[130]', '[‚]')
--SET @CharVal = REPLACE(@CharVal, '[131]', '[ƒ]')
--SET @CharVal = REPLACE(@CharVal, '[132]', '[„]')
--SET @CharVal = REPLACE(@CharVal, '[133]', '[…]')
--SET @CharVal = REPLACE(@CharVal, '[134]', '[†]')
--SET @CharVal = REPLACE(@CharVal, '[135]', '[‡]')
--SET @CharVal = REPLACE(@CharVal, '[136]', '[ˆ]')
--SET @CharVal = REPLACE(@CharVal, '[137]', '[‰]')
--SET @CharVal = REPLACE(@CharVal, '[138]', '[Š]')
--SET @CharVal = REPLACE(@CharVal, '[139]', '[‹]')
--SET @CharVal = REPLACE(@CharVal, '[140]', '[Œ]')
--SET @CharVal = REPLACE(@CharVal, '[141]', '[]]')
--SET @CharVal = REPLACE(@CharVal, '[142]', '[Ž]')
--SET @CharVal = REPLACE(@CharVal, '[143]', '[]]')
--SET @CharVal = REPLACE(@CharVal, '[144]', '[]]')
--SET @CharVal = REPLACE(@CharVal, '[145]', '[‘]')
--SET @CharVal = REPLACE(@CharVal, '[146]', '[’]')
--SET @CharVal = REPLACE(@CharVal, '[147]', '[“]')
--SET @CharVal = REPLACE(@CharVal, '[148]', '[”]')
--SET @CharVal = REPLACE(@CharVal, '[149]', '[•]')
--SET @CharVal = REPLACE(@CharVal, '[150]', '[–]')
--SET @CharVal = REPLACE(@CharVal, '[151]', '[—]')
--SET @CharVal = REPLACE(@CharVal, '[152]', '[˜]')
--SET @CharVal = REPLACE(@CharVal, '[153]', '[™]')
--SET @CharVal = REPLACE(@CharVal, '[154]', '[š]')
--SET @CharVal = REPLACE(@CharVal, '[155]', '[›]')
--SET @CharVal = REPLACE(@CharVal, '[156]', '[œ]')
--SET @CharVal = REPLACE(@CharVal, '[157]', '[]]')
--SET @CharVal = REPLACE(@CharVal, '[158]', '[ž]')
--SET @CharVal = REPLACE(@CharVal, '[159]', '[Ÿ]')
--SET @CharVal = REPLACE(@CharVal, '[160]', '[]]')
--SET @CharVal = REPLACE(@CharVal, '[161]', '[¡]')
--SET @CharVal = REPLACE(@CharVal, '[162]', '[¢]')
--SET @CharVal = REPLACE(@CharVal, '[163]', '[£]')
--SET @CharVal = REPLACE(@CharVal, '[164]', '[¤]')
--SET @CharVal = REPLACE(@CharVal, '[165]', '[¥]')
--SET @CharVal = REPLACE(@CharVal, '[166]', '[¦]')
--SET @CharVal = REPLACE(@CharVal, '[167]', '[§]')
--SET @CharVal = REPLACE(@CharVal, '[168]', '[¨]')
--SET @CharVal = REPLACE(@CharVal, '[169]', '[©]')
--SET @CharVal = REPLACE(@CharVal, '[170]', '[ª]')
--SET @CharVal = REPLACE(@CharVal, '[171]', '[«]')
--SET @CharVal = REPLACE(@CharVal, '[172]', '[¬]')
--SET @CharVal = REPLACE(@CharVal, '[173]', '[]]')
--SET @CharVal = REPLACE(@CharVal, '[174]', '[®]')
--SET @CharVal = REPLACE(@CharVal, '[175]', '[¯]')
--SET @CharVal = REPLACE(@CharVal, '[176]', '[°]')
--SET @CharVal = REPLACE(@CharVal, '[177]', '[±]')
--SET @CharVal = REPLACE(@CharVal, '[178]', '[²]')
--SET @CharVal = REPLACE(@CharVal, '[179]', '[³]')
--SET @CharVal = REPLACE(@CharVal, '[180]', '[´]')
--SET @CharVal = REPLACE(@CharVal, '[181]', '[µ]')
--SET @CharVal = REPLACE(@CharVal, '[182]', '[¶]')
--SET @CharVal = REPLACE(@CharVal, '[183]', '[·]')
--SET @CharVal = REPLACE(@CharVal, '[184]', '[¸]')
--SET @CharVal = REPLACE(@CharVal, '[185]', '[¹]')
--SET @CharVal = REPLACE(@CharVal, '[186]', '[º]')
--SET @CharVal = REPLACE(@CharVal, '[187]', '[»]')
--SET @CharVal = REPLACE(@CharVal, '[188]', '[¼]')
--SET @CharVal = REPLACE(@CharVal, '[189]', '[½]')
--SET @CharVal = REPLACE(@CharVal, '[190]', '[¾]')
--SET @CharVal = REPLACE(@CharVal, '[191]', '[¿]')
--SET @CharVal = REPLACE(@CharVal, '[192]', '[À]')
--SET @CharVal = REPLACE(@CharVal, '[193]', '[Á]')
--SET @CharVal = REPLACE(@CharVal, '[194]', '[Â]')
--SET @CharVal = REPLACE(@CharVal, '[195]', '[Ã]')
--SET @CharVal = REPLACE(@CharVal, '[196]', '[Ä]')
--SET @CharVal = REPLACE(@CharVal, '[197]', '[Å]')
--SET @CharVal = REPLACE(@CharVal, '[198]', '[Æ]')
--SET @CharVal = REPLACE(@CharVal, '[199]', '[Ç]')
--SET @CharVal = REPLACE(@CharVal, '[200]', '[È]')
--SET @CharVal = REPLACE(@CharVal, '[201]', '[É]')
--SET @CharVal = REPLACE(@CharVal, '[202]', '[Ê]')
--SET @CharVal = REPLACE(@CharVal, '[203]', '[Ë]')
--SET @CharVal = REPLACE(@CharVal, '[204]', '[Ì]')
--SET @CharVal = REPLACE(@CharVal, '[205]', '[Í]')
--SET @CharVal = REPLACE(@CharVal, '[206]', '[Î]')
--SET @CharVal = REPLACE(@CharVal, '[207]', '[Ï]')
--SET @CharVal = REPLACE(@CharVal, '[208]', '[Ð]')
--SET @CharVal = REPLACE(@CharVal, '[209]', '[Ñ]')
--SET @CharVal = REPLACE(@CharVal, '[210]', '[Ò]')
--SET @CharVal = REPLACE(@CharVal, '[211]', '[Ó]')
--SET @CharVal = REPLACE(@CharVal, '[212]', '[Ô]')
--SET @CharVal = REPLACE(@CharVal, '[213]', '[Õ]')
--SET @CharVal = REPLACE(@CharVal, '[214]', '[Ö]')
--SET @CharVal = REPLACE(@CharVal, '[215]', '[×]')
--SET @CharVal = REPLACE(@CharVal, '[216]', '[Ø]')
--SET @CharVal = REPLACE(@CharVal, '[217]', '[Ù]')
--SET @CharVal = REPLACE(@CharVal, '[218]', '[Ú]')
--SET @CharVal = REPLACE(@CharVal, '[219]', '[Û]')
--SET @CharVal = REPLACE(@CharVal, '[220]', '[Ü]')
--SET @CharVal = REPLACE(@CharVal, '[221]', '[Ý]')
--SET @CharVal = REPLACE(@CharVal, '[222]', '[Þ]')
--SET @CharVal = REPLACE(@CharVal, '[223]', '[ß]')
--SET @CharVal = REPLACE(@CharVal, '[224]', '[à]')
--SET @CharVal = REPLACE(@CharVal, '[225]', '[á]')
--SET @CharVal = REPLACE(@CharVal, '[226]', '[â]')
--SET @CharVal = REPLACE(@CharVal, '[227]', '[ã]')
--SET @CharVal = REPLACE(@CharVal, '[228]', '[ä]')
--SET @CharVal = REPLACE(@CharVal, '[229]', '[å]')
--SET @CharVal = REPLACE(@CharVal, '[230]', '[æ]')
--SET @CharVal = REPLACE(@CharVal, '[231]', '[ç]')
--SET @CharVal = REPLACE(@CharVal, '[232]', '[è]')
--SET @CharVal = REPLACE(@CharVal, '[233]', '[é]')
--SET @CharVal = REPLACE(@CharVal, '[234]', '[ê]')
--SET @CharVal = REPLACE(@CharVal, '[235]', '[ë]')
--SET @CharVal = REPLACE(@CharVal, '[236]', '[ì]')
--SET @CharVal = REPLACE(@CharVal, '[237]', '[í]')
--SET @CharVal = REPLACE(@CharVal, '[238]', '[î]')
--SET @CharVal = REPLACE(@CharVal, '[239]', '[ï]')
--SET @CharVal = REPLACE(@CharVal, '[240]', '[ð]')
--SET @CharVal = REPLACE(@CharVal, '[241]', '[ñ]')
--SET @CharVal = REPLACE(@CharVal, '[242]', '[ò]')
--SET @CharVal = REPLACE(@CharVal, '[243]', '[ó]')
--SET @CharVal = REPLACE(@CharVal, '[244]', '[ô]')
--SET @CharVal = REPLACE(@CharVal, '[245]', '[õ]')
--SET @CharVal = REPLACE(@CharVal, '[246]', '[ö]')
--SET @CharVal = REPLACE(@CharVal, '[247]', '[÷]')
--SET @CharVal = REPLACE(@CharVal, '[248]', '[ø]')
--SET @CharVal = REPLACE(@CharVal, '[249]', '[ù]')
--SET @CharVal = REPLACE(@CharVal, '[250]', '[ú]')
--SET @CharVal = REPLACE(@CharVal, '[251]', '[û]')
--SET @CharVal = REPLACE(@CharVal, '[252]', '[ü]')
--SET @CharVal = REPLACE(@CharVal, '[253]', '[ý]')
--SET @CharVal = REPLACE(@CharVal, '[254]', '[þ]')
--SET @CharVal = REPLACE(@CharVal, '[255]', '[ÿ]')
END
ELSE
BEGIN
SET @CharVal = SUBSTRING(@SearchString, @CharPosition, 1)
END
SET @ReturnVal = @ReturnVal + @CharVal
SET @CharPosition = @CharPosition + 1
END
IF (@isValid = 1) SET @ReturnVal = NULL
RETURN @ReturnVal
END
จากนั้นเรียกมันว่า:
SELECT BadString, dbo.Find_Invalid_Chars(BadString) [Invalid Characters]
FROM #tmp_Table tmp_mc
WHERE dbo.Find_Invalid_Chars(BadString) IS NOT NULL
ตัวอย่างผลลัพธ์:
หรือ
