php - PHP从MySQL中删除两个表不匹配的行

Question

我有两张桌子：

tickets
tickets_updates

我认为在表tickets_updates中不存在记录的地方有一些额外的行tickets

运行 SQL 代码的最佳方式是什么？

删除所有不在的tickets_updates地方（序列）ticket_seqtickets

门票表中的序列与门票更新表中的门票序列匹配

score 5 · Accepted Answer

DELETE FROM tickets_updates
WHERE  ticket_seq NOT IN (SELECT sequence
                           FROM   tickets)

score 3 · Accepted Answer

DELETE FROM tickets_updates tu
LEFT JOIN tickets t ON tu.ticket_seq = t.sequence
WHERE t.sequence IS NULL

score -1 · Accepted Answer

试试这个：

DELETE FROM ticket_updates
WHERE NOT EXISTS
    (SELECT 'x' from tickets
    WHERE tickets.sequence = ticket_updates.ticket_seq)

3 回答 3