How to check if 1 id is less than another

How can I开发者_C百科 check to see if an item has a lower id than of another item on the same table?

I already have this:

while ($row = $result->fetch_array()) {
if ($row[name] == $myusername) {
    $mysqli->query("DELETE FROM users WHERE name='$myusername' AND password='$mypassword'");
} }

But this is useless as it deletes the account as soon as it's made.

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You could add it in the WHERE clause

DELETE FROM users WHERE name='$myusername' AND password='$mypassword' AND users.id < [someOtheID]

You need to give a schema if you want a better answer

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Just as you compare the name and password, also compare the id column.

$mysqli->query("DELETE FROM users WHERE name='$myusername' AND password='$mypassword' AND id != $myid");

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This assumes you have the user you just added's id (that is an integer) in the variable $id

$mysqli->query("DELETE FROM users 
    WHERE name='$myusername' AND password='$mypassword' AND id != $id"
);

That way you'll delete all users with the same username and password, that wasn't the row you just added.