General Question

frankielaguna's avatar

MySQL Sort by every other row?

Asked by frankielaguna (256points) June 10th, 2009

Okay so I’ve run into a road block here and I need some help..


I have a table with a name and sex field.

I need sort this table by sex but it needs to be every other row.

In other words..



I’ve been trying to think of a PHP solution for it but what I came up with didn’t work quite right..

Does anyone have any suggestions on how I may accomplish this in PHP or SQL?

Observing members: 0 Composing members: 0

9 Answers

jrpowell's avatar

Couldn’t you just grab the males in a query and do the same for the females. Then loop through them in PHP.

If that made any sense.

frankielaguna's avatar

I’ve done a query and through the males in an array and the females in their own..

Say we have 3 males and 1 Female I need to spit it out as


Any suggestions on how to do that in PHP?

I hope that made sense…

jrpowell's avatar

Couldn’t you use isset and echo something like <br /> if it returns false.

MrItty's avatar

Here’s the perl answer. Been a while since I did PHP. I assume you can convert…

my @males = get_males_from_db();
my @females = get_females_from_db();

my $num_males = @males;
my $num_females = @females;

for my $i (0..max($num_males, $num_females) – 1) {
print $males[$i] || ‘BLANK’;
print $females[$i] || ‘BLANK’;

frankielaguna's avatar

@mritty I actually just came up with a solution which is essentially the same thing. Heres the code I came up with:

I’m sure there’s a simpler way to check the array keys but I’m too tired to think right now :)

Thanks for all your help!

jumpo7's avatar

Looks like you answered your own question… Here is my pathetic pseudo code;

This is psuedo code for one way to do what you want to do;

mquery = males results

fquery = females results

if fquery number of results is greater than mquery number of results {
. . . run function large_result(fquery)
} elseif mquery is greater than fquery {
. . . run function large_result(mquery)
} elseif mquery = fquery results {
. . . run function simpleloop

function large_result {

. . . for i <= large number results {

. . . . . . add2line .= larger[i]

. . . . . . if large increment i <= max of the smaller {

. . . . . . . . . for k <= smaller number results {
. . . . . . . . . . . . add2line .= smaller[k]
. . . . . . . . . }

. . . . . . } else {
. . . . . . . . . add2line .= blank
. . . . . . }
. . . }

funciton simpleloop {

. . . for i <= result (doesn’t matter which one) {
. . . . . . add2line .= mquery[i]
. . . . . . add2line .= fquery[i]
. . . }

echo add2line

pretty sad but it should produce what you’re looking for…

wenn's avatar

you can also look into a PHP Modulus function, i had one in a project a while back to sort a table with alternating colors, and im sure you can set it up to sort categories. i would need to search my project files for it, but if i find it ill post it.

frankielaguna's avatar

@wenn Normally I would use the modulus but this was a special case in which it would not work.

HungryGuy's avatar

I think you’re design is flawed for what you want to do. What you want to do is create two separate queries/cursors, one for all M and one for all F. Then in your processing loop, fetch one from the M cursor and one from the F cursor.

You’ll need to plan for what will happen if you come to the end of the F or M cursor before the end of the other cursor.

Answer this question




to answer.

This question is in the General Section. Responses must be helpful and on-topic.

Your answer will be saved while you login or join.

Have a question? Ask Fluther!

What do you know more about?
Knowledge Networking @ Fluther