NOT IN 查询的问题

Question

SELECT DISTINCT d.customer_id, d.date_added FROM `order` d
WHERE d.customer_id NOT IN (
    SELECT DISTINCT i.customer_id 
    FROM `order` i 
    WHERE i.date_added > '2015-02-15 14:00:00'
)
ORDER BY d.date_added DESC;

上述查询应返回 2015 年 2 月 15 日之后未订购的客户的 customer_id（我认为）。但第一个记录是
17168, 2015-08-16 17:36:00

我究竟做错了什么？

这个下面的查询

SELECT DISTINCT i.customer_id,i.date_added FROM `order` i 
WHERE i.date_added > '2015-02-15 14:00:00' 
ORDER BY i.date_added ASC;

返回预期结果，即 2 月 15 日之后下订单的客户 ID 列表

PS customer_id 不能为NULL

缴费灵

mysql> SHOW CREATE TABLE `order`;
+-------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table | Create Table                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
+-------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| order | CREATE TABLE `order` (
  `order_id` int(11) NOT NULL AUTO_INCREMENT,
  `invoice_no` int(11) NOT NULL,
  `invoice_prefix` varchar(26) NOT NULL,
  `store_id` int(11) NOT NULL,
  `store_name` varchar(64) NOT NULL,
  `store_url` varchar(255) NOT NULL,
  `customer_id` int(11) NOT NULL,
  `customer_group_id` int(11) NOT NULL,
  `firstname` varchar(32) NOT NULL,
  `lastname` varchar(32) NOT NULL,
  `email` varchar(96) NOT NULL,
  `telephone` varchar(32) NOT NULL,
  `fax` varchar(32) NOT NULL,
  `custom_field` text NOT NULL,
  `payment_firstname` varchar(32) NOT NULL,
  `payment_lastname` varchar(32) NOT NULL,
  `payment_company` varchar(40) NOT NULL,
  `payment_address_1` varchar(128) NOT NULL,
  `payment_address_2` varchar(128) NOT NULL,
  `payment_city` varchar(128) NOT NULL,
  `payment_postcode` varchar(10) NOT NULL,
  `payment_country` varchar(128) NOT NULL,
  `payment_country_id` int(11) NOT NULL,
  `payment_zone` varchar(128) NOT NULL,
  `payment_zone_id` int(11) NOT NULL,
  `payment_address_format` text NOT NULL,
  `payment_custom_field` text NOT NULL,
  `payment_method` varchar(128) NOT NULL,
  `payment_code` varchar(128) NOT NULL,
  `shipping_firstname` varchar(32) NOT NULL,
  `shipping_lastname` varchar(32) NOT NULL,
  `shipping_company` varchar(40) NOT NULL,
  `shipping_address_1` varchar(128) NOT NULL,
  `shipping_address_2` varchar(128) NOT NULL,
  `shipping_city` varchar(128) NOT NULL,
  `shipping_postcode` varchar(10) NOT NULL,
  `shipping_country` varchar(128) NOT NULL,
  `shipping_country_id` int(11) NOT NULL,
  `shipping_zone` varchar(128) NOT NULL,
  `shipping_zone_id` int(11) NOT NULL,
  `shipping_address_format` text NOT NULL,
  `shipping_custom_field` text NOT NULL,
  `shipping_method` varchar(128) NOT NULL,
  `shipping_code` varchar(128) NOT NULL,
  `comment` text NOT NULL,
  `total` decimal(15,4) NOT NULL DEFAULT '0.0000',
  `order_status_id` int(11) NOT NULL,
  `affiliate_id` int(11) NOT NULL,
  `commission` decimal(15,4) NOT NULL,
  `marketing_id` int(11) NOT NULL,
  `tracking` varchar(64) NOT NULL,
  `language_id` int(11) NOT NULL,
  `currency_id` int(11) NOT NULL,
  `currency_code` varchar(3) NOT NULL,
  `currency_value` decimal(15,8) NOT NULL DEFAULT '1.00000000',
  `ip` varchar(40) NOT NULL,
  `forwarded_ip` varchar(40) NOT NULL,
  `user_agent` varchar(255) NOT NULL,
  `accept_language` varchar(255) NOT NULL,
  `date_added` datetime NOT NULL,
  `date_modified` datetime NOT NULL,
  `payment_company_id` varchar(32) NOT NULL,
  `payment_tax_id` varchar(32) NOT NULL,
  `review_requested` int(11) NOT NULL DEFAULT '0',
  PRIMARY KEY (`order_id`),
  KEY `store_id` (`store_id`),
  KEY `customer_id` (`customer_id`),
  KEY `customer_group_id` (`customer_group_id`),
  KEY `payment_country_id` (`payment_country_id`),
  KEY `payment_zone_id` (`payment_zone_id`),
  KEY `shipping_country_id` (`shipping_country_id`),
  KEY `shipping_zone_id` (`shipping_zone_id`),
  KEY `order_status_id` (`order_status_id`),
  KEY `affiliate_id` (`affiliate_id`),
  KEY `marketing_id` (`marketing_id`),
  KEY `language_id` (`language_id`),
  KEY `currency_id` (`currency_id`),
  KEY `payment_company_id` (`payment_company_id`),
  KEY `payment_tax_id` (`payment_tax_id`)
) ENGINE=MyISAM AUTO_INCREMENT=39783 DEFAULT CHARSET=utf8 |
+-------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set

Answer 1

这看起来像一个错误。5.6 中引入的关于反连接和子查询具体化的优化器改进似乎是相关的。有一个类似的错误（#73368），与子查询具体化相关，但已在 5.6.22 版本中修复。

我建议您首先尝试使用以下每个选项运行查询，并检查是否得到相同的意外/错误结果：

set optimizer_switch = 'semijoin=off';

set optimizer_switch = 'materialization=off';

只是注意到它是一个 MyISAM 表，因此也值得检查是否存在损坏问题（您可以CHECK和/或REPAIR表）。

然后使用最新的 5.6.26 版本更新您的安装，并使用默认选项再次检查（并再次使用上面的 2 个选项）。

如果您仍然得到错误的结果，请向 MySQL报告错误，添加查询、表CREATE语句、EXPLAIN输出并上传表的转储，以便他们可以重现它。如果您可以使用较小的表（仅 2-3 列和几行）重现该错误，那么会比 50 列和数千行的表好得多。