Question

I want to execute two select queries in one go, but the data isn’t related to each other so a LEFT JOIn etc. will not do.. because then I end up with data I can’t use.

What I got so far is;

$sql .= "SELECT *,
        servertypes.id as servertypeID, 
        servertypes.name as servertypeName 
       FROM servertypes";

$sql .= " JOIN".
    " (SELECT *,
        periods.id as periodID,
        periods.daysForSorting as periodNumber,
        periods.text as periodsText
       FROM periods
       ) AS periods";

$res = mysql_query($sql);
if(!$res) die("database_error_cant_select_data : ".$sql." : ".mysql_error());

But now how do I access servertypes and periods separately? I think I have to stop using JOIN altogether but I wouldn’t know…

To illustrate what I mean, it’s something like:

while ($row = mysql_fetch_assoc($res["servertypes"]))
{
    print_r($row);
    echo"<br/><br/>";
}

while ($row = mysql_fetch_assoc($res["periods"]))
{
    print_r($row);
    echo"<br/><br/>";
}

Is this possible using only one query?

Answer 1

Normally, you could do something like that IF both query return the same column number

Table1
-----------
ProductID
Price
Qty

Table2
-----------
ProductID
Price
Qty

$Query = '(SELECT "Table1" AS Source, * FROM Table1) UNION (SELECT "Table2" AS Source, * FROM Table2)';

$Data = array('T1' => array(), 'T2' => array());
while($Assoc = mysql_fetch_assoc($Query)){
    switch(strtoupper($Assoc['Source'])){
        case 'TABLE1':
            $Data['T1'][] = $Assoc;
            break;

        case 'TABLE2':
            $Data['T2'][] = $Assoc;
            break;

        default:
            break;
    }
}

//  $Data['T1'] now hold everything from Table1
//  $Data['T2'] now hold everything from Table2

But here, nothing is related. So to answer your question : no you cannot do what you want.