Дмитрий Энтелис

SELECT .... WHERE price > 0 AND ... ORDER BY ...
UNION
SELECT .... WHERE price = 0 AND ... ORDER BY ...

SELECT ... IF (price > 0, 1, 0) as has_price  ... ORDER BY has_price  DESC ...

Example on a new Row: 
<?php 
$sql = "INSERT INTO city (`city`) VALUES ('Paris') ON DUPLICATE KEY UPDATE `city` = 'Paris"; 
$dbh->query($sql); 
echo $dbh->lastInsertId(); 
?> 

Above displays: 1 
Expected display: 1 

Example on an existing row that gets updated: 
<?php 
$sql = "INSERT INTO city (`city`) VALUES ('Paris') ON DUPLICATE KEY UPDATE `city` = 'Paris"; 
$dbh->query($sql); 
echo $dbh->lastInsertId(); 
?> 
Above displays: 2 
Expected display: 1 (since no new records were inserted)

<?php 
try { 
    $dbh = new PDO('mysql:host=localhost;dbname=test', 'username', 'password'); 

    $stmt = $dbh->prepare("INSERT INTO test (name, email) VALUES(?,?)"); 

    try { 
        $dbh->beginTransaction(); 
        $tmt->execute( array('user', 'user@example.com')); 
        $dbh->commit(); 
        print $dbh->lastInsertId(); 
    } catch(PDOExecption $e) { 
        $dbh->rollback(); 
        print "Error!: " . $e->getMessage() . "</br>"; 
    } 
} catch( PDOExecption $e ) { 
    print "Error!: " . $e->getMessage() . "</br>"; 
} 
?>

SELECT is_positive, COUNT(id) AS count FROM review GROUP BY is_positive

ALTER TABLE  `yyyy` CHANGE  `xxxx`  `xxxx` DECIMAL( 10, 2 ) NOT NULL;

UPDATE content SET worker_id = $id WHERE worker_id=null AND state = 0 LIMIT 5;
SELECT * FROM content WHERE worker_id = $id;