//by www.qzphp.cn
$query=$db->query("SELECT * FROM {$pre}coupon_user A LEFT JOIN {$pre}coupon_show B ON A.couponid=B.id WHERE A.`uid`='$data[uid]' AND A.`isuse`='0' AND B.`totalmoney`+0<'$data[totalmoney]' AND B.expirationtime>'$timestamp'");
这一句：B.`totalmoney`+0<'$data[totalmoney]'
