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About Subquery


groover

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Correct -- but you can (almost) always achieve the same result with a temporary table, or by storing the result of the previous query in PHP. For example, you could get all the users from table2, join the results with commas, and pass them into your table1 query and achieve the same effect.

Hope that helps.
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Here you go (untested):

[code]<?php
$result = mysql_query("SELECT DISTINCT user FROM table2");
$arr = array();
while( $row = mysql_fetch_row($result) ) { $arr[] = $row[0]; }
$users = implode( "','", $arr );

$result2 = mysql_query("SELECT user FROM table1 WHERE user NOT IN ($users)");
?> [/code]

Hope that helps.
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