science-ation/db/db.update.216.php

<?
function db_update_216_pre() 
{
}

function db_update_216_post()
{
	$tables=array(
		"award_awards",
		"award_prizes",
		"award_types",
		"award_awards_projectcategories",
		"award_awards_projectdivisions",
		"winners",
		"students",
		"projects",
		"registrations"
	);

	// add the conferences_id field
	foreach($tables as $tableName){
		$query = "ALTER TABLE `$tableName` ADD `conferences_id` INT NOT NULL";
		mysql_query($query);
		echo $query . ";\n";
	}

	// get the year => conference_id links
	$q1 = mysql_query("SELECT year, id FROM conferences WHERE year > 0");

	// add the conferences_id field to each table
	while($r = mysql_fetch_assoc($q1)){
		foreach($tables as $tableName){
			$query = "UPDATE `$tableName` SET `conferences_id` = {$r['id']} WHERE `year` = {$r['year']}";
			mysql_query($query);
			echo $query . ";\n";
		}
	}

	// a one-off update unique to the award_prizes table
	$query = "UPDATE award_prizes SET conferences_id = -1 WHERE year = -1";
	mysql_query($query);
	echo $query . ";\n";
}
?>