MySQL子查询需要很长时间才能响应

我已经创建了3个表imei、post和view。我在所有3张表中都有大约1000条记录。现在，当我执行b/m查询时，它需要很长时间才能响应

下表给出了设计和样本数据：

表中的值：

IMEI：

职位：

视图：

要执行的查询：

SELECT
    *
FROM
    (
        SELECT
            i.imei_id,
            i.imei_no,
            p.post_id,
            p.post_title,
            p.post_desc,
            p.date,
            1 AS STATUS
        FROM
            imei i,
            post p,
            VIEW v
        WHERE
            i.imei_id = v.imei_id
        AND p.post_id = v.post_id
        AND i.imei_no = 356554064098771
        UNION
            SELECT
                i.imei_id,
                i.imei_no,
                p.post_id,
                p.post_title,
                p.post_desc,
                p.date,
                0 AS STATUS
            FROM
                imei i,
                post p
            WHERE
                i.imei_no = 356554064098771
            AND p.post_id NOT IN (
                SELECT
                    v.post_id
                FROM
                    imei i,
                    post p,
                    VIEW v
                WHERE
                    p.post_id = v.post_id
                AND v.imei_id = (
                    SELECT
                        i.imei_id
                    FROM
                        imei i
                    WHERE
                        imei_no = 356554064098771
                )
            )
    ) AS temp
WHERE
    date >= DATE_SUB(
        (
            SELECT
                date
            FROM
                imei
            WHERE
                imei_no = 356554064098771
        ),
        INTERVAL 1 WEEK
    )
ORDER BY
    date DESC

---

尝试此查询从视图中选择post_id、post_title、post_desc、date、ifpost_id，其中imei_id=从imei中选择imei_id，其中imei_no=865645026396909,1,0作为状态从post

您希望得到什么结果？请还包括解释的结果。我得到了正确的结果，但这需要更多的时间，因为我使用的不是处于状态。我需要另一个解决方案这个问题对我来说太复杂了，我认为它没有意义。在union的第二次查询中，您从所有3个表中选择，但在where条件中，您仅联接2个post和view，因此与imei表的联接成为carthesian联接，因此对于imei表中的每个记录，您都会得到其他2个表联接的每个记录。@Lijibals原始样本数据，预期结果，口头描述你想要达到的目标对我们理解你的疑问很重要。如果没有这些，将很难为您提供替代解决方案。您的查询似乎过于复杂。此查询运行良好！加载时间从0.4缩短到0.05。如果可能的话，进一步优化它以减少加载时间，谢谢你的代码。

CREATE TABLE IF NOT EXISTS `post` (
  `post_id` int(5) NOT NULL AUTO_INCREMENT,
  `post_title` varchar(60) NOT NULL,
  `post_desc` varchar(500) NOT NULL,
  `post_author` varchar(30) NOT NULL DEFAULT 'Admin',
  `user_id` int(10) NOT NULL DEFAULT '1',
  `date` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00' ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`post_id`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=876 ;

CREATE TABLE IF NOT EXISTS `view` (
  `view_id` int(5) NOT NULL AUTO_INCREMENT,
  `post_id` int(11) NOT NULL,
  `imei_id` varchar(30) NOT NULL,
  `status` varchar(10) NOT NULL,
  `date` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`view_id`),
  UNIQUE KEY `imei_id` (`imei_id`,`post_id`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=13706 ;

INSERT INTO `imei` (`imei_id`, `imei_no`, `imei_net`, `date`) VALUES
(1, '123456789012345', 'Airtel', '2015-08-06 07:39:47'),
(2, '234567890123456', 'Aircel', '2015-08-06 06:08:33')

INSERT INTO `post` (`post_id`, `post_title`, `post_desc`, `post_author`, `user_id`, `date`) VALUES
    (1, 'NSC Rate Down', 'NSC rates are getting down from today', 'Admin', 1, '2015-07-08 05:29:54'),
    (2, 'NCDEX offers cashback', 'NCDEX offers cashback for the previous users', 'Admin', 1, '2015-07-08 05:30:01')

INSERT INTO `view` (`view_id`, `post_id`, `imei_id`, `status`, `date`) VALUES
(1, 1, '1', '1', '2015-08-08 05:04:38'),
(7, 2, '1', '1', '2015-08-08 07:55:25')

SELECT
    *
FROM
    (
        SELECT
            i.imei_id,
            i.imei_no,
            p.post_id,
            p.post_title,
            p.post_desc,
            p.date,
            1 AS STATUS
        FROM
            imei i,
            post p,
            VIEW v
        WHERE
            i.imei_id = v.imei_id
        AND p.post_id = v.post_id
        AND i.imei_no = 356554064098771
        UNION
            SELECT
                i.imei_id,
                i.imei_no,
                p.post_id,
                p.post_title,
                p.post_desc,
                p.date,
                0 AS STATUS
            FROM
                imei i,
                post p
            WHERE
                i.imei_no = 356554064098771
            AND p.post_id NOT IN (
                SELECT
                    v.post_id
                FROM
                    imei i,
                    post p,
                    VIEW v
                WHERE
                    p.post_id = v.post_id
                AND v.imei_id = (
                    SELECT
                        i.imei_id
                    FROM
                        imei i
                    WHERE
                        imei_no = 356554064098771
                )
            )
    ) AS temp
WHERE
    date >= DATE_SUB(
        (
            SELECT
                date
            FROM
                imei
            WHERE
                imei_no = 356554064098771
        ),
        INTERVAL 1 WEEK
    )
ORDER BY
    date DESC