MySQL连接和关联数组？

Question

我试图做一个MySQL的加入，像这样，

$q = $dbc -> prepare("SELECT m.* a.username FROM mailbox m JOIN accounts a (m.msgFrom = a.id) WHERE msgTo = ? AND sent = '0'"); 
$q -> execute(array($user['id'])); 
while ($msg = $q -> fetch(PDO::FETCH_ASSOC)) { 
    echo $msg['username']; 
} 

我想从表帐户拉动用户的用户名，而不是仅仅显示从表邮箱的ID，我得到的阵列进行while循环查询，

虽然这似乎不工作，任何想法？

Answer 1

您在连接条件忘了on试试这个：

SELECT m.*, a.username 
FROM mailbox m JOIN accounts a on (m.msgFrom = a.id) 
WHERE msgTo = ? AND sent = '0'