复杂的MySQL查询
我正在尝试编写一个复杂的SQL查询,但无法获得具有正确值的结果集复杂的MySQL查询,mysql,sql,Mysql,Sql,我正在尝试编写一个复杂的SQL查询,但无法获得具有正确值的结果集 优惠券表包含一些在线优惠券 商户表保存商户信息并与优惠券绑定。商户id 分支机构表包含商户分支机构的lat和lng值(用于计算距离和最近的分支机构等),并与商户表的分支机构相关联。商户id coups\u分支机构表格连接coups和分支机构表格 places表包含一些特殊的位置,如购物中心等,并与分支机构表绑定分支机构。place\u id 下面是我的表格结构 CREATE TABLE IF NOT EXISTS `branc
表包含一些在线优惠券优惠券
表保存商户信息并与商户
绑定。商户id优惠券
表包含商户分支机构的分支机构
和lat
值(用于计算距离和最近的分支机构等),并与lng
表的商户
分支机构相关联。商户id
表格连接coups\u分支机构
和coups
表格分支机构
表包含一些特殊的位置,如购物中心等,并与places
表绑定分支机构
分支机构。place\u id
CREATE TABLE IF NOT EXISTS `branches` (
`branch_id` int(11) unsigned NOT NULL AUTO_INCREMENT,
`merchant_id` int(11) unsigned NOT NULL DEFAULT '0',
`place_id` smallint(5) unsigned NOT NULL DEFAULT '0',
`branch` varchar(40) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
`address` varchar(255) COLLATE utf8_unicode_ci DEFAULT '',
`postcode` varchar(6) COLLATE utf8_unicode_ci DEFAULT '',
`phone` varchar(20) COLLATE utf8_unicode_ci DEFAULT NULL,
`fax` varchar(20) COLLATE utf8_unicode_ci DEFAULT NULL,
`lat` float(10,6) DEFAULT NULL,
`lng` float(10,6) DEFAULT NULL,
`status` tinyint(4) unsigned NOT NULL DEFAULT '1',
PRIMARY KEY (`branch_id`),
KEY `lat` (`lat`),
KEY `lng` (`lng`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=1 ;
CREATE TABLE IF NOT EXISTS `coupons` (
`coupon_id` mediumint(9) unsigned NOT NULL AUTO_INCREMENT,
`category_id` tinyint(4) unsigned NOT NULL DEFAULT '0',
`merchant_id` mediumint(9) unsigned NOT NULL DEFAULT '0',
`coupon` varchar(200) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
`description` longtext COLLATE utf8_unicode_ci,
`start_date` date DEFAULT NULL,
`end_date` date DEFAULT NULL,
`coupon_usage` int(10) unsigned NOT NULL DEFAULT '0',
`created` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
`status` enum('active','passive','deleted','preview') COLLATE utf8_unicode_ci NOT NULL DEFAULT 'active',
PRIMARY KEY (`coupon_id`),
KEY `start_date` (`start_date`),
KEY `end_date` (`end_date`),
KEY `merchant_id` (`merchant_id`),
KEY `category_id` (`category_id`),
KEY `status` (`status`),
KEY `created` (`created`),
FULLTEXT KEY `description` (`description`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=1 ;
CREATE TABLE IF NOT EXISTS `coupons_branches` (
`branch_id` int(11) unsigned NOT NULL DEFAULT '0',
`coupon_id` int(11) unsigned NOT NULL DEFAULT '0',
PRIMARY KEY (`branch_id`,`coupon_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
CREATE TABLE IF NOT EXISTS `merchants` (
`merchant_id` int(11) unsigned NOT NULL AUTO_INCREMENT,
`merchant` varchar(80) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
`website` varchar(150) COLLATE utf8_unicode_ci DEFAULT NULL,
`created` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
`status` enum('active','passive','deleted') COLLATE utf8_unicode_ci NOT NULL DEFAULT 'passive',
PRIMARY KEY (`merchant_id`),
KEY `status` (`status`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=1 ;
CREATE TABLE IF NOT EXISTS `places` (
`place_id` smallint(5) unsigned NOT NULL AUTO_INCREMENT,
`city_id` smallint(5) unsigned NOT NULL DEFAULT '0',
`place` varchar(150) COLLATE utf8_unicode_ci DEFAULT NULL,
PRIMARY KEY (`place_id`),
KEY `place` (`place`),
KEY `city_id` (`city_id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=1 ;
这是我的SQL
SELECT * FROM (SELECT coupons.coupon_id AS c_id, coupons.category_id, coupons.coupon, merchants.merchant_id, merchants.merchant, (((acos(sin((41.02287686 * pi() / 180)) * sin((branches.lat * pi() / 180)) + cos((41.02287686 * pi() / 180)) * cos((branches.lat * pi()/ 180)) * cos(((29.04632806 - branches.lng) * pi() / 180)))) * 180 / pi()) * 60 * 1.1515 * 1.609344) as distance, COUNT(coupons.coupon_id) AS total_coupons
FROM (`coupons`)
INNER JOIN `coupons_branches` ON `coupons`.`coupon_id` = `coupons_branches`.`coupon_id`
RIGHT OUTER JOIN `branches` ON `coupons_branches`.`branch_id` = `branches`.`branch_id`
LEFT OUTER JOIN `merchants` ON `coupons`.`merchant_id` = `merchants`.`merchant_id`
WHERE `coupons`.`status` = 'active'
AND `merchants`.`status` = 'active'
GROUP BY `merchants`.`merchant_id`
HAVING `distance` <= 25000
ORDER BY `merchants`.`merchant`) as T2 GROUP BY c_id ORDER BY merchant
分支
和位置
表有问题,但我找不到。尝试将计数()
表达式更改为计数(不同的优惠券.优惠券id)
。如果没有DISTINCT关键字,即使是重复的优惠券也会计入商家优惠券的总数。我猜您只是在查找当前分发给分支机构的优惠券总额。为什么要在查询中加入places
表?我没有看到查询中使用的表中的任何数据?此查询有点复杂。有时我会使用where places.place\u id=XXX
子句来缩小搜索结果的范围。但你是对的,我的错误是在这里包括places
表。我已经编辑了上面的查询。total_优惠券以何种方式不正确?当您看到一个类似于SELECT*FROM(subquery)GROUP BY…
的查询时,通常会出现一些错误。
SELECT * FROM (SELECT coupons.coupon_id, coupons.coupon_id AS c_id, coupons.category_id, coupons.coupon, merchants.merchant_id, merchants.merchant, coupons.coupon_usage, COUNT(coupons.coupon_id) AS total_coupons
FROM (`coupons`)
LEFT OUTER JOIN `merchants` ON `coupons`.`merchant_id` = `merchants`.`merchant_id`
WHERE `coupons`.`status` = 'active'
AND `merchants`.`status` = 'active'
GROUP BY `merchants`.`merchant_id`
ORDER BY `merchants`.`merchant`) as T2 GROUP BY c_id ORDER BY merchant