MySQL - 选择查询

Question

我几个小时试图进行查询，但我没有成功！ :(

与此查询我选择users_id并购买了由关键用户的purchase_date：

SELECT user_id, purchase_date FROM purchases AS p 
INNER JOIN keys AS pc 
ON p.transaction_id = pc.unique_id 
WHERE pc.generator_id = 96768 
GROUP BY user_id 

现在我想从这些用户后，该谁买选择 例如：SELECT * FROM purchases WHERE user_id = {users of query above} AND purchase_date > {purchase_date of query above}

Answer 1

你可以加入子查询表：

SELECT pr.* 
FROM purchases pr 
INNER JOIN ( 
    SELECT p.user_id, p.purchase_date 
    FROM purchases p 
    INNER JOIN keys pc ON p.transaction_id = pc.unique_id 
    WHERE pc.generator_id = 96768 
    GROUP BY p.user_id 
) p0 ON pr.user_id = p0.user_id AND pr.purchase_date > p0.purchase_date 

信息：MySQL JOIN Syntax