MySQL: Update several entries with array values in 1 call? - php

Question

If I have a table in a MySQL DB, with fields id and position amung others.
Then in PHP I have an array like this:
Array
(
[0] => 1
[1] => 3
[2] => 8
[3] => 4
[4] => 5
[5] => 6
[6] => 7
)
Where the array key should map to the position and the array value should map to the id.
For example, If I made a call for every array value the first would be
UPDATE table SET position = 0 WHERE id = 1
Is there a way I could do all this in 1 call?

Answer 1

$string = "";
foreach($array as $k => $v)
$string .= "UPDATE table SET position = ".$v." WHERE id = ".$k.";";
mysql_query($string);

Answer 2

updating multiple records with different values for each record is possible, but it's not recommdned - it makes for an incredibly ugly query:
UPDATE table
SET position = CASE position
WHEN 0 THEN 1
WHEN 1 THEN 3
WHEN 2 THEN 8
etc...

Answer 3

Here we go a foreach solution :
$Array = array(0 => 1, 1 => 3);
if(count($Array) > 0){
foreach($Array as $Key => $Value)
// UPDATE table SET position = 1 WHERE id = 3 LIMIT 1
mysql_query('UPDATE table SET position = '.$Key.' WHERE id = '.$Value.' LIMIT 1;');
}
Problem : you can't do multiple update with MySQL ... yes, like Marc B said but it's very ugly.