Я пытаюсь улучшить производительность следующего запроса, который занял 93,2 секунд, чтобы выполнить запрос ниже:MySQL Улучшение времени выполнения производительности
SELECT year(date), month(date), `country_name_name`,
CEIL(count(res.`user_xmpp_login`) /DAY(LAST_DAY(date))) as avgUser,
CEIL(count(res.user)/DAY(LAST_DAY(date))) as avgPurchase
FROM
( SELECT DATE(`user_registration_timestamp`) as date,
user_country,
NULL as user, `user_xmpp_login`
FROM users
WHERE `user_registration_timestamp` >= "2015-01-01 00:00:00"
AND `user_registration_timestamp` < "2016-01-01 00:00:00"
UNION ALL
SELECT DATE(`ts`) as date, user_country, user, NULL as `user_xmpp_login`
FROM purchase_log p
INNER JOIN users u ON u.`user_xmpp_login` = p.`user`
WHERE `ts` >= "2015-01-01 00:00:00"
AND `ts` < "2016-01-01 00:00:00"
AND result in ('ok', 'cancelled', 'pending')
) AS res
INNER JOIN countries c ON c.`country_id` = res.`user_country`
INNER JOIN country_names cn
ON (cn.`country_name_country` = c.`country_id`
AND cn.`country_name_language` = 'en')
GROUP BY 1,2,3
ORDER BY 4 DESC,5 DESC, 3 ASC;
Объяснить команду показывает: и структуру каждой таблицы:
покупки таблица:
CREATE TABLE `purchase` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`user` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`ts` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
`result` varchar(32) COLLATE utf8_unicode_ci NOT NULL,
PRIMARY KEY (`id`),
KEY `iuser` (`user`),
) ENGINE=InnoDB AUTO_INCREMENT=12710221 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
пользователей таблица:
CREATE TABLE `users` (
`user_id` int(11) NOT NULL AUTO_INCREMENT,
`user_country` int(11) DEFAULT NULL,
`user_xmpp_login` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
`user_registration_timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (`user_id`),
UNIQUE KEY `user_xmpp_login_UNIQUE` (`user_xmpp_login`),
KEY `user_country_FK` (`user_country`),
KEY `user_registration_timestamp` (`user_registration_timestamp`),
CONSTRAINT `users_country_FK` FOREIGN KEY (`user_country`)
REFERENCES `countries` (`country_id`) ON UPDATE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=33504745 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
страны таблица
CREATE TABLE `countries` (
`country_id` int(11) NOT NULL AUTO_INCREMENT,
`country_code` varchar(2) COLLATE utf8_unicode_ci NOT NULL,
PRIMARY KEY (`country_id`),
) ENGINE=InnoDB AUTO_INCREMENT=508 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
названия стран
CREATE TABLE `country_names` (
`country_name_id` int(11) NOT NULL AUTO_INCREMENT,
`country_name_country` int(11) NOT NULL,
`country_name_language` char(2) COLLATE utf8_unicode_ci NOT NULL,
`country_name_name` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
PRIMARY KEY (`country_name_id`),
UNIQUE KEY `country_name_country_language_UNIQUE`
(`country_name_country`,`country_name_language`),
KEY `country_name_language` (`country_name_language`),
CONSTRAINT `country_name_country` FOREIGN KEY (`country_name_country`)
REFERENCES `countries` (`country_id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=45793 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
Есть ли какие-либо рекомендации?
@ e4c5, я сделал! –