PHP / MySQL批量删除

Question

is there a way to batch up deletes for MySQL when using PHP (mysqli)?

With inserts you can do something like

insert into tbl (...) values (...) (...) (...) ...

is there any equivalent for deletes?

Answer 1

delete from tbl where id IN (1,2,3)

OR

delete from tbl where id = 1 OR id = 2 OR email = 'admin@example.com'

you can make sure you delete the right data by doing select first...

ps: for the php,

<?
$ids = array(1,2,3);

$sql = "DELETE FROM tbl WHERE id IN (" . implode(',', $ids) . ")";
?>

or

<?
$deleteme = array("id = 1", "id = 2", "email = 'admin@example.com'");

$sql = "DELETE FROM tbl WHERE " . implode(' OR ', $deleteme);
?>

Answer 2

You can use the WHERE clausole. For example:

DELETE FROM table WHERE Id in (0,1,...,n)

Answer 3

If I understood your question correctly, then:

• It does not really depend on PHP, it's purely up to the SQL statement used
• Usually, you delete rows based ON WHERE X = Y condition. So if you want to delete multiple rows, you would just extend the condition to WHERE X = Y OR X = Z or even WHERE X IN (Y, Z, ..)

Answer 4

Use In clause in delete statement, this is one of the best methods and you can pass thousands of ids in IN clause. I personally tested 25k ids and it's worked