Php Mysqli：如何在一个查询中删除多个条目

Question

如何组合这两个查询：

$deletetix = mysqli_query($conn, "DELETE FROM presale WHERE PID = '$codeID'");
$deleteorder = mysqli_query($conn, "DELETE FROM oc_customer_ohistory WHERE order_date = '$todaydate'");

进入一个查询，以便提高效率

Answer 1

DELETE t1, t2 FROM t1, t2 WHERE t1.id = t2.id;