如何从 2 个 mysql 表中获取结果？ [关闭]

Question

我想从 2 个表 'altitle' 和 'scroll100' 中获取结果，其中 live = 1 delete = 0 和 categori = 1 或 9 或 30。我实际上只能从一张表中获取结果，有人可以帮我吗？

$results = $pdo->query('SELECT * FROM  `altitle` WHERE  `live` = 1 AND `delete` = 0 AND `kategori` = 1 ORDER BY  `id` DESC ')->fetchAll(PDO::FETCH_ASSOC);

Answer 1

关于你的评论，你应该把你的两个表放在 FROM 子句中：

$results = $pdo->query('SELECT * FROM  `altitle` a, `scroll100` s 
                        WHERE  a.`live` = 1
                        AND a.`delete` = 0 
                        AND (a.`kategori` = 1
                        OR a.`kategori` = 9
                        OR a.`kategori` = 30)
                        AND s.`live` = 1
                        AND s.`delete` = 0 
                        AND (s.`kategori` = 1
                        OR s.`kategori` = 9
                        OR s.`kategori` = 30)
                        ORDER BY  a.`id` DESC ')->fetchAll(PDO::FETCH_ASSOC);

这是一个奇怪的架构，你知道的。