Firstly I want to point out that I have tried almost everything. I am trying since last 8 hours to make my list in order, and I have applied dozen of solutions found here.
Here is SQL Fiddle with the sample data. I have found a page that manages to sort my list in the right order, and that is:
1
2
2.B3
5
9
10 A-1
10 A-3
10 B-4
10 B-5
11
12
B3-43
B3-44
B3 - 48
B3 - 49
Basztowa 3
Basztowa 4
Basztowa 5
Basztowa 7
Basztowa 9
D.1
D.2
D.10
D.11
D.12
Kabaty ul. Pod lipą 4
But I am not able to reproduce this using MySQL.
I would appreciate any help as I have no more ideas. I consider using PHP to sort my list but as far as I know DBMS are optimized for this kid of operations so if it's possible I would like to avoid doing this using PHP.
@UPDATE
Thanks to @Jakumi I have created two functions that helps me to solve my problem.
You need to create a column to store your values in sort-friendly format (zeropadded_name), create trigger on update and insert to fill zeropadded_name when name changes and that's all! Now just order by zeropadded_name and enjoy!
Helper functions
regex_replace- Its task is to help us sanitize value by removing all non-alphanumeric characters.lpad_numbers- pads every number in our string. It's a bit ugly, as I don't know MySQL functions much, but hey, it works, quite fast.
Example:
SELECT lpad_numbers(regex_replace('[^a-zA-Z0-9]', ' ', 'B3 - A-5'));
#B0003A0005
DROP FUNCTION IF EXISTS regex_replace;
CREATE FUNCTION `regex_replace`(
pattern VARCHAR(1000)
CHARSET utf8
COLLATE utf8_polish_ci,
replacement VARCHAR(1000)
CHARSET utf8
COLLATE utf8_polish_ci,
original VARCHAR(1000)
CHARSET utf8
COLLATE utf8_polish_ci
) RETURNS varchar(1000) CHARSET utf8
DETERMINISTIC
BEGIN
DECLARE temp VARCHAR(1000)
CHARSET utf8
COLLATE utf8_polish_ci;
DECLARE ch VARCHAR(1)
CHARSET utf8
COLLATE utf8_polish_ci;
DECLARE i INT;
SET i = 1;
SET temp = '';
IF original REGEXP pattern
THEN
loop_label: LOOP
IF i > CHAR_LENGTH(original)
THEN
LEAVE loop_label;
END IF;
SET ch = SUBSTRING(original, i, 1);
IF NOT ch REGEXP pattern
THEN
SET temp = CONCAT(temp, ch);
ELSE
SET temp = CONCAT(temp, replacement);
END IF;
SET i = i + 1;
END LOOP;
ELSE
SET temp = original;
END IF;
RETURN temp;
END;
DROP FUNCTION IF EXISTS lpad_numbers;
CREATE FUNCTION `lpad_numbers`(str VARCHAR(256)) RETURNS varchar(256) CHARSET utf8 COLLATE utf8_polish_ci
BEGIN
DECLARE i, len SMALLINT DEFAULT 1;
DECLARE ret VARCHAR(256) DEFAULT '';
DECLARE num VARCHAR(256) DEFAULT '';
DECLARE c CHAR(1);
IF str IS NULL
THEN
RETURN "";
END IF;
SET len = CHAR_LENGTH(str);
REPEAT
BEGIN
SET c = MID(str, i, 1);
IF c BETWEEN '0' AND '9'
THEN
SET num = c;
SET i = i + 1;
REPEAT
BEGIN
SET c = MID(str, i, 1);
SET num = CONCAT(num, c);
SET i = i + 1;
END;
UNTIL c NOT BETWEEN '0' AND '9' END REPEAT;
SET ret = CONCAT(ret, LPAD(num, 4, '0'));
ELSE
SET ret = CONCAT(ret, c);
SET i = i + 1;
END IF;
END;
UNTIL i > len END REPEAT;
RETURN ret;
END;
