table user:
id_u* f_name l_name
----------------------
1 andi mitchel
2 sarah bench
3 kirsty larx
table voucher:
id_v* id_user id_target
1 1 2
2 2 3
很困惑如何加入这些表的两个外键的MySQL连接两个表
$db->query("SELECT * FROM voucher v
LEFT JOIN user u ON u.id_u = v.id_user
LEFT JOIN user u1 ON u1.id_u = v.id_target
WHERE .... ")
呼应while循环...并没有返回?
while($r = $q->fetch_array(MYSQLI_ASSOC)) :
echo $r['u.f_name'];
echo $r['u1.f_name'];
endwhile;
yeehh非常感谢:) – tonoslfx 2011-04-26 18:30:48