MySQL get all affected rows for multiple statements in one query

Question

MySQL/PHP:

For a query with multiple statements, which deletes rows in four different tables, I want to know the combined number of affected rows. T

Answer 1

Here is a compact, procedural-style mysqli_multi_query() solution for counting combined affected rows:

$deleteContactSQL="DELETE FROM `persons` WHERE `id`='$person' AND `owner='$user' AND `userOrContact`='contact';
         DELETE FROM `tabs` WHERE `person`='$person' AND `ownerIdentity`='$user' AND `selfOrOther`='other';
         DELETE FROM `tabAccess` WHERE `person`='$person' AND `givenToIdentity`='$user';
         DELETE FROM `personAccess` WHERE `viewedPerson`='$person' AND `viewerIdentity`='$user';";
include $_SERVER['DOCUMENT_ROOT'].'/goalview/includes/db.inc.php';
if(mysqli_multi_query($link,$deleteContactSQL)){
    do{
        $success+=mysqli_affected_rows($link);
    }while(mysqli_more_results($link) && mysqli_next_result($link));
}

Alternatively, this group of queries may be a good candidate for some TRIGGERs in the persons table.