ordering two columns php mysql

Question

I have a query:

<?php

$results = $dbConn->select("SELECT entryA, entryB FROM table");

/**
Displays the rows on $results (entryA, entryB)
1      7
8      5
4      3
5      8
7      1
3      4
**/

$results = $dbConn->select("SELECT entryA, entryB FROM table ORDER BY ?");
/**
The correct output must be: (entryA, entryB)
1      7
7      1
8      5
5      8
4      3
**/


?>

How can i possible to order two columns that equal/match to each other ids in a different row?

Thanks in advance.

Answer 1

Yes, it is. For example

SELECT entryA, entryB FROM table ORDER BY entryA*entryA+entryB*entryB

-in my samples I'm supposing you have both pair variants, i,e {1,7} and {7,1} , for example.

This will group same pairs independent of elements order, but you may wish to have additional order condition - then simply add it to ORDER BY clause