Question

我坚持做一个查询。我想考虑其他三个表的值来提取一个表的10个第一个记录。我会尝试用一个例子解释我想要的东西：

TABLES

USERS：用户名和日期
POINTS：id_user，points
COMMENTS：id_user
WON：id_user

标准必须：拥有更多积分的10位用户，如果价值相同，发布的评论越多，最近的日期日期就越少，并且没有获胜。按此顺序。

SELECT id, username, date FROM users as us LIMIT 10 ORDER BY date DESC JOIN id_user, points FROM points as po WHERE us.id = po.id_user ORDER BY po.points DESC JOIN COUNT (id_user) FROM comments JOIN COUNT (id_user) FROM won;

我知道这是错的...... :(

Answer 1

假设用户有id字段和created日期时间字段，我认为您正在寻找类似的内容

SELECT *
FROM Users
LEFT JOIN Points ON Points.id_user = Users.id
LEFT JOIN Comments ON Comments.id_user = Users.id
LEFT JOIN Won ON Won.id_user = Users.id
GROUP BY Users.id
ORDER BY SUM(Points.points) DESC, COUNT(Comments.id) DESC, MAX(Users.created) DESC, COUNT(Won.id) DESC

MYSQL查询四个表

1 个答案: