Is there a way to perform a MySQL query and have one of the columns in the output directly urldecode, rather than have PHP do it.
For example this table 'contacts' would contain,
------------------------------------ |name |email | ------------------------------------ |John Smith|johnsmith%40hotmail.com| ------------------------------------
SELECT * FROM `contacts`
Would output,
John Smith | johnsmith%40@hotmail.com
Is there something along the lines of,
SELECT name, urldecode(email) FROM `contacts`
To output,
John Smith | johnsmith@hotmail.com
If anyone is still looking for a mysql decode function:
DROP TABLE IF EXISTS urlcodemap;
CREATE TABLE `urlcodemap` (
`id` INT(11) NOT NULL AUTO_INCREMENT,
`encoded` VARCHAR(128) NOT NULL,
`decoded` VARCHAR(128) NOT NULL,
UNIQUE KEY urlcodemapUIdx1(encoded),
PRIMARY KEY (`id`)
) ENGINE=INNODB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
-- Table that contains the list of encode\decode.
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%20"," ");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%21","!");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%22","""");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%23","#");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%24","$");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%25","%");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%26","&");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%27","'");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%28","(");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%29",")");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%2A","*");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%2B","+");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%2C",",");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%2D","-");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%2E",".");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%2F","/");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%30","0");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%31","1");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%32","2");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%33","3");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%34","4");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%35","5");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%36","6");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%37","7");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%38","8");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%39","9");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%3A",":");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%3B",";");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%3C","<");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%3D","=");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%3E",">");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%3F","?");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%40","@");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%41","A");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%42","B");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%43","C");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%44","D");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%45","E");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%46","F");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%47","G");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%48","H");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%49","I");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%4A","J");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%4B","K");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%4C","L");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%4D","M");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%4E","N");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%4F","O");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%50","P");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%51","Q");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%52","R");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%53","S");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%54","T");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%55","U");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%56","V");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%57","W");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%58","X");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%59","Y");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%5A","Z");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%5B","[");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%5C","\\");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%5D","]");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%5E","^");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%5F","_");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%60","`");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%61","a");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%62","b");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%63","c");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%64","d");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%65","e");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%66","f");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%67","g");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%68","h");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%69","i");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%6A","j");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%6B","k");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%6C","l");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%6D","m");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%6E","n");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%6F","o");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%70","p");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%71","q");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%72","r");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%73","s");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%74","t");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%75","u");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%76","v");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%77","w");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%78","x");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%79","y");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%7A","z");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%7B","{");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%7C","|");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%7D","}");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%7E","~");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%80","`");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%82","‚");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%83","ƒ");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%84","„");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%85","…");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%86","†");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%87","‡");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%88","ˆ");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%89","‰");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%8A","Š");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%8B","‹");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%8C","Œ");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%8E","Ž");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%91","‘");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%92","’");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%93","“");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%94","”");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%95","•");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%96","–");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%97","—");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%98","˜");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%99","™");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%9A","š");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%9B","›");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%9C","œ");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%9E","ž");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%9F","Ÿ");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%A1","¡");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%A2","¢");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%A3","£");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%A4","¤");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%A5","¥");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%A6","¦");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%A7","§");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%A8","¨");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%A9","©");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%AA","ª");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%AB","«");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%AC","¬");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%AE","®");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%AF","¯");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%B0","°");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%B1","±");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%B2","²");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%B3","³");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%B4","´");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%B5","µ");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%B6","¶");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%B7","·");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%B8","¸");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%B9","¹");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%BA","º");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%BB","»");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%BC","¼");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%BD","½");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%BE","¾");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%BF","¿");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%C0","À");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%C1","Á");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%C2","Â");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%C3","Ã");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%C4","Ä");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%C5","Å");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%C6","Æ");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%C7","Ç");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%C8","È");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%C9","É");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%CA","");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%CB","Ë");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%CC","Ì");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%CD","Í");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%CE","Î");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%CF","Ï");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%D0","Ð");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%D1","Ñ");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%D2","Ò");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%D3","Ó");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%D4","Ô");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%D5","Õ");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%D6","Ö");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%D7","×");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%D8","Ø");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%D9","Ù");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%DA","Ú");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%DB","Û");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%DC","Ü");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%DD","Ý");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%DE","Þ");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%DF","ß");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%E0","à");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%E1","á");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%E2","â");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%E3","ã");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%E4","ä");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%E5","å");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%E6","æ");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%E7","ç");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%E8","è");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%E9","é");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%EA","ê");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%EB","ë");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%EC","ì");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%ED","í");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%EE","î");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%EF","ï");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%F0","ð");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%F1","ñ");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%F2","ò");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%F3","ó");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%F4","ô");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%F5","õ");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%F6","ö");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%F7","÷");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%F8","ø");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%F9","ù");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%FA","ú");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%FB","û");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%FC","ü");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%FD","ý");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%FE","þ");
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%FF","ÿ");
DELIMITER $$
DROP FUNCTION IF EXISTS `URLDECODER`$$
CREATE FUNCTION `URLDECODER`(str VARCHAR(4096) CHARSET utf8) RETURNS VARCHAR(4096) DETERMINISTIC
BEGIN
DECLARE X INT;
DECLARE chr VARCHAR(256);
DECLARE chrto VARCHAR(256);
DECLARE result VARCHAR(4096);
SET X = 1;
WHILE X <= (SELECT MAX(id) FROM urlcodemap) DO
SET chr = (SELECT `encoded` FROM urlcodemap WHERE id = X);
SET chrto = (SELECT `decoded` FROM urlcodemap WHERE id = X);
SET str = REPLACE(str,chr,chrto);
SET X = X + 1;
END WHILE;
RETURN str;
END$$
DELIMITER ;
Usage example
SELECT urldecoder('http://testing.com/questions/7031469/is%20this%20working');
I feel like its important to answer the original question ( regardless of alternatives ), mainly because its been asked and is a valid question:
The short answer: You cannot.
There is no native SQL function for decoding URL encoded strings.
The long answer: You need to write a custom SQL function:
Encode / Decode MySQL functions: http://www.dzone.com/snippets/urlencodeurldecode-mysql
The best answer: Anything URL Encoded can be stored as UTF8.
Change your tables to UTF8 by: dumping, replacing "latin1" with "utf8", and importing. Then run a script ( just once ) such as PHP, Python, or Rails to decode your column and store it back. And now you're ready to use your DB as it was intended. No overhead.
Python code to do this:
import urllib
import MySQLdb
def decode():
con = MySQLdb.Connect(host="127.0.0.1", port=3306, user="root", passwd="", db="hostip")
cursor = con.cursor()
cursor.execute("SELECT city, name FROM cityByCountry")
for row in cursor.fetchall():
print row
cursor.execute("UPDATE cityByCountry SET name=%s WHERE city=%s", (urllib.unquote(row[1]), row[0]))
if __name__ == "__main__":
decode()
My solution is to declare Stored Function to decode url encoded string:
DELIMITER $$
DROP FUNCTION IF EXISTS URL_DECODE $$
CREATE FUNCTION URL_DECODE (str text)
RETURNS text
DETERMINISTIC
BEGIN
DECLARE result text;
DECLARE ind INT DEFAULT 0;
SET result = REPLACE(str, '+', ' ');
WHILE ind <= 255 DO
SET result = REPLACE(result, CONCAT('%', LPAD(LOWER(HEX(ind)), 2, 0)), CHAR(ind));
SET result = REPLACE(result, CONCAT('%', LPAD(HEX(ind), 2, 0)), CHAR(ind));
SET ind = ind + 1;
END WHILE;
RETURN result;
END$$
DELIMITER ;
And than use it next way:
SELECT URL_DECODE('johnsmith%40hotmail.com')
I needed a solution when selecting data records that may contain encoded URL special chars $ & + , / : ; = ? @ (whitespace not included) and doing it like that (example code):
SELECT * FROM `table` WHERE `field` REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(`field`,'%24','$'),'%26','&'),'%2B','+'),'%2C',','),'%2F','/'),'%3A',':'),'%3B',';'),'%3D','='),'%3F','?'),'%40','@') LIKE '/example-request-uri?'
My answer would be very similar to Mistdemon, but with the following changes:
(1) This line should be the top insert:
INSERT INTO urlcodemap (encoded,decoded) VALUES ("%25","%");
Otherwise a space comes out as %2520 instead of %20 since space is before %....
(2) If URL encoding for post, remove all the lines for A-Z, a-z, and 0-9. The post server can definitely read standard letters and numbers... and the whole thing does not look like gobbledy-gook.
I managed to use a seperate line of PHP code to urldecode the query response back from the SQL statement before it was passed to the json_encode which is used for the JQuery autocomplete.
来源：https://stackoverflow.com/questions/6993754/mysql-select-with-url-decode