Check for tom database

Hvordan kan jeg nemmest checke om en database er tom ?

mysql_connect("$host" , "$user" , "$pass");
mysql_select_db("$db");
$contents = mysql_query("SELECT * FROM section ORDER BY id DESC");

if (database == tom)
{
do that
}

else
{
while ($indhold = mysql_fetch_row ($contents))
{
bla bla bla
}
}