MySQL PHP order by -


i'm writing mysql query sort kind of data

traffic 100/40 12/1 50/20 25/5

the value devide right hand side number left hand side number.

also have multi columns sort

ex - select * fltable order traffic desc,speed asc,cost asc

i need sort data ascending order , descending order, can me this.

thank you

select * fractions; +-----------+ | fractions | +-----------+ | 100/40    | | 12/1      | | 25/5      | | 50/20     | +-----------+  select fractions      , substring_index(fractions,'/',1)/substring_index(fractions,'/',-1)x    fractions   order      x desc; +-----------+------+ | fractions | x    | +-----------+------+ | 12/1      |   12 | | 25/5      |    5 | | 100/40    |  2.5 | | 50/20     |  2.5 | +-----------+------+

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