Question

How can I do one single query with both an INSERT and SELECT in it and then read the results of selection?
I want to insert and then select something, all must be done in one query…

I know it accept multiple commands in single query…But I want to read results of query and I cannot read results. I’m doing this:

$results=mysql_query("
INSERT INTO table1 (field1,field2) VALUES('aaa','bbbb') ON DUPLICATE KEY UPDATE `field1` = 'cccc', `field2`='dddddd'; 
SELECT field3 Form Table3 WHERE field3='eeeee';
",$connection);

while ($rows = mysql_fetch_array($results, MYSQL_NUM))  
echo $rows[0];

Answer 1

It is possible to send multiple statements in PHP if you are using the mysqli extension, which is a good idea to use instead of the older mysql extension for a lot of reasons. Here is a modified example from the multiple statements section of the documentation, based on your question:

$mysqli = new mysqli("example.com", "user", "password", "database");

$sql .= "INSERT INTO table1 (field1,field2) VALUES('aaa','bbbb') ON DUPLICATE KEY UPDATE `field1` = 'cccc', `field2`='dddddd';";
$sql .= "SELECT field3 Form Table3 WHERE field3='eeeee';";

$mysqli->multi_query($sql);

do {
    if ($res = $mysqli->store_result()) {
        var_dump($res->fetch_all(MYSQLI_ASSOC));
        $res->free();
    }
} while ($mysqli->more_results() && $mysqli->next_result());
?>

Notice that the documentation does dedicate airtime to security risks of multiple statements, which everyone is pointing out. The other reason, of course, that it’s not always a great idea is if you want the second statement to be affected by the first statement.