sql - MySQL - 需要帮助来找出多个连接

Question

我正在使用以下查询从用户创建的表中获取事务。然后我想检索 sender_id 和 recipient_id 的用户名。但是我似乎只能为 recipient_id 或 sender_id 获取它。任何人都知道我如何同时获得两者。

SELECT us.name, ta.amount, ta.recipient_id, ta.sender_id, ta.timestamp_insert
        FROM  `transactions` AS ta
        JOIN users AS us
        ON ta.recipient_id=us.u_id
        WHERE ta.sender_id =111111 OR ta.recipient_id = 111111
        LIMIT 0 , 10

交易表列:

交易编号
tw_id
tw
发件人编号
收件人编号
数量
时间戳_插入
时间戳_开始 时间戳完成 交易状态

用户表列:

你的身份， 姓名

Answer 1

您需要加入两次，因此:

SELECT ta.amount, ta.recipient_id, ta.sender_id, ta.timestamp_insert, sender.name as Sender, recipient.name as Recipient
        FROM  `transactions` AS ta
        JOIN users AS recipient
        ON ta.recipient_id=recipient.u_id
        JOIN users AS sender
        ON ta.sender_id=sender.u_id
        WHERE ta.sender_id =111111 OR ta.recipient_id = 111111
        LIMIT 0 , 10