2

MySQL/PHP:

4 つの異なるテーブルの行を削除する複数のステートメントを含むクエリの場合、影響を受ける行の合計数を知りたいです。PHP のマニュアルには、最後の「操作」からのみ結果を取得すると書かれています。これは、最後の DELETE ステートメントによって影響を受けた行の数だけを教えてくれることを示唆しています。これを回避する方法は？

$deleteContactSQL = "DELETE FROM `persons` WHERE `persons`.`id` = '$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';
$deleteContacts = mysqli_query($link, $deleteContactSQL);
$success = mysqli_affected_rows($link);
4

3 に答える 3

2

多分このような何か？

include $_SERVER['DOCUMENT_ROOT'] . '/goalview/includes/db.inc.php';

$sql = array();
$sql[] = "DELETE FROM `persons` WHERE `persons`.`id` = '$person' AND `owner = '$user' AND `userOrContact` = 'contact';"
$sql[] = "DELETE FROM `tabs` WHERE `person` = '$person' AND `ownerIdentity` = '$user' AND `selfOrOther` = 'other';"
$sql[] = "DELETE FROM `tabAccess` WHERE `person`= '$person' AND `givenToIdentity` = '$user';"
$sql[] = "DELETE FROM `personAccess` WHERE `viewedPerson` = '$person' AND `viewerIdentity` = '$user';"

$aff_rows = 0;

foreach($sql as $current_sql)
{
 $deleteContacts = mysqli_query($link, $current_sql); 
 $aff_rows = $aff_rows + mysqli_affected_rows($link);
}
于 2010-11-12T10:06:47.557 に答える
-1

私はこのようにしていますが、誰もが理解できるわけではないことをシンプルに保つのが好きです ;)

$deleteContactSQL = sprintf("call cascade_delete_persons(%d,%d)", $person, $user);
$deleteContacts = mysqli_query($link, $deleteContactSQL);

drop procedure if exists cascade_delete_persons;

delimiter #

create procedure cascade_delete_persons
(
in p_pid int unsigned,
in p_oid int unsigned
)
begin

declare v_persons_count int unsigned default 0;
declare v_tabs_count int unsigned default 0;

    delete from persons where id = p_pid and owner = p_oid and userOrContact = 'contact';
    set v_persons_count = row_count();

    delete from tabs where person = p_pid and ownerIdentity = p_oid and selfOrOther = 'other';
    set v_tabs_count = row_count();

    -- etc...

    select v_persons_count as person_count, v_tabs_count as tabs_count;

end #

delimiter ;

必要に応じて、この方法も使用できます: http://php.net/manual/en/mysqli.multi-query.php

于 2010-11-12T10:21:55.653 に答える