基于日期从三个表中查询MySQL

Question

我试图基于用户在MYSQL中的订阅开始日期来获取用户信息。

这是我到目前为止提出的。

    SELECT a.id, a.user_login, a.user_email, c.cardtype, c.accountnumber, a.user_pass, a.user_registered
    FROM users a
    INNER JOIN memberships_users b
    ON b.user_id = a.id
    INNER JOIN memberships_order c
    ON c.user_id = a.id
    WHERE b.status = 'active' AND 
          (c.cyckle_period = 6 AND 
          ('2016-06-01 00:00:00' < (SELECT c.startdate ORDER BY c.startdate DESC LIMIT 1)) 
          OR 
          (c.cyckle_period = 1 AND 
          ('2015-12-01 00:00:00' < (SELECT c.startdate ORDER BY c.startdate DESC LIMIT 1));

该查询给我错误消息“您的SQL语法有错误；请查看与您的MySQL服务器版本相对应的手册，以在第8行的'LIMIT 0，30'附近使用正确的语法”。

Answer 1

我在您发布的代码中看不到任何LIMIT 0, 30 。 您输入正确的代码了吗？ 顺便说一句，您的下面这部分是完全错误的

'2015-12-01 00:00:00' < (SELECT c.startdate ORDER BY c.startdate DESC LIMIT 1)

应该是

'2015-12-01 00:00:00' < SELECT max(startdate) FROM memberships_order

如下更改您的WHERE部分

WHERE b.status = 'active' AND 
      c.cyckle_period IN (6, 1) AND 
      '2015-12-01 00:00:00' < (SELECT max(startdate) FROM memberships_order);

Answer 2

我认为您只是缺少右括号。 根据我的看法，

从用户中选择a.id，a.user_login，a.user_email，c.cardtype，c.accountnumber，a.user_pass，a.user_registered。 user_id = a.id WHERE b.status ='active'AND（c.cyckle_period = 6 AND（'2016-06-01 00:00:00'<（SELECT c.startdate ORDER BY c.startdate DESC LIMIT 1）） ）OR（c.cyckle_period = 1 AND（'2015-12-01 00:00:00'<（SELECT c.startdate ORDER BY c.startdate DESC LIMIT 1））））;