Question

我正在建立一个系统来统计访问我的网站，然后将其显示在图表图表类型上。

例如，我希望通过以下方式获取所有访问次数：

今天的网络访客总数

SELECT COUNT(DISTINCT ip) FROM visits_website WHERE DATE_FORMAT(create_at, '%Y-%m-%d') = CURDATE()) AS total_today

网络总访问时间

SELECT COUNT(DISTINCT ip) FROM visits_website WHERE create_at >= DATE_SUB(NOW(), INTERVAL 1 HOUR)) AS total_before_hours

昨天的网站访问总数

SELECT COUNT(DISTINCT ip) FROM visits_website WHERE create_at >= DATE_SUB(NOW(), INTERVAL 1 DAY)) AS total_yesterday

本周访问网站总数

SELECT COUNT(DISTINCT ip) FROM visits_website WHERE YEARWEEK(create_at, 1) = YEARWEEK(CURDATE(), 1)) AS total_week

上周访问网站

SELECT COUNT(DISTINCT ip) FROM visits_website WHERE create_at >= DATE_SUB(NOW(), INTERVAL 1 WEEK)) AS total_last_weekend

总站点访问月数

SELECT COUNT(DISTINCT ip) FROM visits_website WHERE MONTH(create_at) = MONTH(NOW())) AS total_month

上个月访问网络总数

SELECT COUNT(DISTINCT ip) FROM visits_website WHERE create_at >= DATE_SUB(NOW(), INTERVAL 1 MONTH)) AS total_last_month

全年网络访问总数

SELECT COUNT(DISTINCT ip) FROM visits_website WHERE YEAR(create_at) = YEAR(CURDATE())) AS total_year

我正在MySql表中注册访问该网站，并且我希望在指定期间内使用不同IP收到此表所有访问的网页，我已经与MySql [DATE_SUB]函数进行了多次协商，因为不得不改变一些查询多次：

这些是我为所有访问所做的查询：

SELECT 
COUNT(DISTINCT ip) AS total,
(SELECT COUNT(DISTINCT ip) FROM visits_website WHERE create_at  >= DATE_SUB(NOW(), INTERVAL 1 HOUR)) AS total_before_hours,
(SELECT COUNT(DISTINCT ip) FROM visits_website WHERE DATE_FORMAT(create_at, '%Y-%m-%d') = CURDATE()) AS total_today,
(SELECT COUNT(DISTINCT ip) FROM visits_website WHERE create_at  >= DATE_SUB(NOW(), INTERVAL 1 DAY)) AS total_yesterday,
(SELECT COUNT(DISTINCT ip) FROM visits_website WHERE YEARWEEK(`create_at`, 1) = YEARWEEK(CURDATE(), 1)) AS total_week,
(SELECT COUNT(DISTINCT ip) FROM visits_website WHERE create_at  >= DATE_SUB(NOW(), INTERVAL 1 WEEK)) AS total_last_weekend,
(SELECT COUNT(DISTINCT ip) FROM visits_website WHERE MONTH(`create_at`) = MONTH(NOW())) AS total_month,
(SELECT COUNT(DISTINCT ip) FROM visits_website WHERE create_at  >= DATE_SUB(NOW(), INTERVAL 1 MONTH)) AS total_last_month,
(SELECT COUNT(DISTINCT ip) FROM visits_website WHERE YEAR(`create_at`) = YEAR(CURDATE())) AS total_year
FROM visits_website

我想了解以下内容：

这些最佳的mysql查询和制作此系统的最佳方法是什么？
这是一个很好的开发实践，表中需要更多的索引。

表格代码：

CREATE TABLE IF NOT EXISTS `visits_website` (
    `id` BIGINT UNSIGNED AUTO_INCREMENT,
    `ip` VARCHAR(25) NOT NULL,
    `browser_short` VARCHAR(45) NOT NULL,
    `browser_long` VARCHAR(255) NOT NULL,
    `create_at` DATETIME NOT NULL,
    PRIMARY KEY (`id`),
    INDEX `FK_visits_website` (`ip`)
)Engine=InnoDB;

INSERT INTO `visits_website` VALUES ('1', 'ip1', 'ip1', '', '2016-08-31 20:30:00');
INSERT INTO `visits_website` VALUES ('2', 'ip1', 'ip1', '', '2016-08-31 20:30:00');
INSERT INTO `visits_website` VALUES ('3', 'ip2', 'ip2', '', '2016-08-31 19:30:00');
INSERT INTO `visits_website` VALUES ('4', 'ip1', 'ip1', '', '2016-08-31 19:30:00');
INSERT INTO `visits_website` VALUES ('5', 'ip2', 'ip2', '', '2016-08-31 18:30:00');
INSERT INTO `visits_website` VALUES ('6', 'ip3', 'ip3', '', '2016-08-31 18:30:00');
INSERT INTO `visits_website` VALUES ('7', 'ip1', 'ip1', '', '2016-08-31 17:30:00');
INSERT INTO `visits_website` VALUES ('8', 'ip2', 'ip2', '', '2016-08-31 17:30:00');
INSERT INTO `visits_website` VALUES ('9', 'ip3', 'ip3', '', '2016-08-31 16:30:00');
INSERT INTO `visits_website` VALUES ('10', 'ip4', 'ip4', '', '2016-08-31 16:30:00');
INSERT INTO `visits_website` VALUES ('11', 'ip1', 'ip1', '', '2016-08-30 20:30:00');
INSERT INTO `visits_website` VALUES ('12', 'ip2', 'ip2', '', '2016-08-30 20:30:00');
INSERT INTO `visits_website` VALUES ('13', 'ip3', 'ip3', '', '2016-08-30 20:30:00');
INSERT INTO `visits_website` VALUES ('14', 'ip4', 'ip4', '', '2016-08-30 20:30:00');
INSERT INTO `visits_website` VALUES ('15', 'ip5', 'ip5', '', '2016-08-30 20:30:00');
INSERT INTO `visits_website` VALUES ('16', 'ip1', 'ip1', '', '2016-08-30 20:30:00');
INSERT INTO `visits_website` VALUES ('17', 'ip2', 'ip2', '', '2016-08-30 20:30:00');
INSERT INTO `visits_website` VALUES ('18', 'ip3', 'ip3', '', '2016-08-30 20:30:00');
INSERT INTO `visits_website` VALUES ('19', 'ip4', 'ip4', '', '2016-08-30 20:30:00');
INSERT INTO `visits_website` VALUES ('20', 'ip5', 'ip5', '', '2016-08-30 20:30:00');
INSERT INTO `visits_website` VALUES ('21', 'ip6', 'ip6', '', '2016-08-29 20:30:00');
INSERT INTO `visits_website` VALUES ('22', 'ip1', 'ip1', '', '2016-08-29 20:30:00');
INSERT INTO `visits_website` VALUES ('23', 'ip2', 'ip2', '', '2016-08-29 20:30:00');
INSERT INTO `visits_website` VALUES ('24', 'ip3', 'ip3', '', '2016-08-29 20:30:00');
INSERT INTO `visits_website` VALUES ('25', 'ip4', 'ip4', '', '2016-08-29 20:30:00');
INSERT INTO `visits_website` VALUES ('26', 'ip5', 'ip5', '', '2016-08-29 20:30:00');
INSERT INTO `visits_website` VALUES ('27', 'ip6', 'ip6', '', '2016-08-29 20:30:00');
INSERT INTO `visits_website` VALUES ('28', 'ip7', 'ip7', '', '2016-08-29 20:30:00');
INSERT INTO `visits_website` VALUES ('29', 'ip1', 'ip1', '', '2016-08-29 20:30:00');
INSERT INTO `visits_website` VALUES ('30', 'ip2', 'ip2', '', '2016-08-29 20:30:00');

非常感谢您的帮助。

Answer 1

这是一个很长的问题。关于这种基于DATETIME的摘要生成的一个关键建议：Make your queries sargable -- make them able to use an index.

例如：

 SELECT COUNT(DISTINCT ip)
   FROM visits_website
  WHERE MONTH(create_at) = MONTH(NOW()  /* Slow! */

不是sargable，因为它将函数（MONTH()）应用于表中的列。 MySQL必须检查表的每一行以满足此查询。这将是 slooooow 。而是试试这个，寻找本月的所有访问。

 SELECT COUNT(DISTINCT ip)
   FROM visits_website
  WHERE create_at >= LAST_DAY(NOW()) + INTERVAL 1 DAY - INTERVAL 1 MONTH
    AND create_at < LAST_DAY(NOW()) + INTERVAL 1 DAY

这是有效的，因为它会搜索从当月开始直到但不包括下月初的DATETIME值范围。

然后，在(create_at, ip)上创建compound covering index，您的查询应运行良好。 MySQL可以扫描它所需的索引范围。

请注意，这一切都适用于TIMESTAMP数据。

Mysql - 针对每天，每月，每年和总计的计数器Web访问的SQL查询

1 个答案: