Question

I have this sql query:

$result = mysql_query("SELECT * FROM chat WHERE `to_id` = '$user_id' AND `from_id`   IN($data)") or die(mysql_error());
    while ($row = mysql_fetch_assoc($result)) {
    print_r($row);
}

that returns this arrays:

Array ( [id] => 3505 [from_id] => 111 [to_id] => 109 [message] =>How are you? [sent] =>          1343109753 [recd] => 1 [system_message] => no )    
Array ( [id] => 3506 [from_id] => 111 [to_id]   => 109 [message] =>well... [sent] =>   1343109759 [recd] => 1 [system_message] => no ) 
Array ( [id] => 3507 [from_id] => 141 [to_id] => 109 [message] => bye [sent] => 1343901524 [recd] => 1 [system_message] => no )

From_id is the user ID of the person sending the message but I would like to get only one (the most recent) result for each ‘from_id’. (in this example I got 2 messages from the same ‘from_id’ – 111)

Answer 1

Maybe GROUP BY:

SELECT * FROM chat WHERE `to_id` = '$user_id' AND `from_id` IN($data) GROUP BY  `from_id` ORDER BY `sent` DESC