mysql 计算每月的前三名(并列也算)

初始化数据直接复制执行

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for amysky_wx_member_month_integral
-- ----------------------------
DROP TABLE IF EXISTS `amysky_wx_member_month_integral`;
CREATE TABLE `amysky_wx_member_month_integral` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `create_date` datetime NOT NULL,
  `modify_date` datetime NOT NULL,
  `customer_service` varchar(255) DEFAULT NULL,
  `integral` bigint(20) DEFAULT NULL,
  `month_integral_day` datetime DEFAULT NULL,
  `username` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of amysky_wx_member_month_integral
-- ----------------------------
INSERT INTO `amysky_wx_member_month_integral` VALUES ('1', '2018-08-14 14:03:00', '2018-08-14 14:03:00', '18236782913', '273', '2018-07-14 14:03:00', '18401683822');
INSERT INTO `amysky_wx_member_month_integral` VALUES ('2', '2018-08-14 14:03:00', '2018-08-14 14:03:00', '18236782913', '0', '2018-07-14 14:03:00', '18515999013');
INSERT INTO `amysky_wx_member_month_integral` VALUES ('3', '2018-08-14 14:03:00', '2018-08-14 14:03:00', '18236782913', '2', '2018-07-14 14:03:00', '13853000760');
INSERT INTO `amysky_wx_member_month_integral` VALUES ('4', '2018-08-14 14:03:00', '2018-08-14 14:03:00', '[email protected]', '234', '2018-07-14 14:03:00', '18601097059');
INSERT INTO `amysky_wx_member_month_integral` VALUES ('5', '2018-08-14 15:40:11', '2018-08-14 15:40:08', '[email protected]', '234', '2018-07-14 15:40:23', '18601097052');
INSERT INTO `amysky_wx_member_month_integral` VALUES ('6', '2018-08-14 15:40:53', '2018-08-14 15:40:55', '18236782913', '500', '2018-08-14 15:41:03', '18601097051');

SQL语句

SELECT
	b.*
FROM
	amysky_wx_member_month_integral AS b,
	(
		SELECT
			a.integral AS integral
		FROM
			amysky_wx_member_month_integral AS a
		WHERE
			DATE_FORMAT(
				'2018-07-14 14:03:00', //这是我替换的变量
				'%Y%m'
			) = DATE_FORMAT(
				a.month_integral_day,
				'%Y%m'
			)
		GROUP BY
			a.integral
		ORDER BY
			a.integral DESC
		LIMIT 0,
		3
	) AS c
WHERE
	b.integral = c.integral
AND DATE_FORMAT(
	'2018-07-14 14:03:00', //这是我替换的变量
	'%Y%m'
) = DATE_FORMAT(
	b.month_integral_day,
	'%Y%m'
)
ORDER BY
	b.integral DESC

我的问题是:

计算会员排名每月都要选出前三名但是不计算人数只要分数达到就OK

大体思路:

1.先根据时间过滤一下选出符合的月份的数据

select * from  amysky_wx_member_month_integral as a where  DATE_FORMAT('2018-07-14 14:03:00','%Y%m') =DATE_FORMAT(a.month_integral_day,'%Y%m')

2.再根据 integral 字段分组排序 limit 0,3 获取最高的三个

select a.integral as integral  from amysky_wx_member_month_integral as  a where DATE_FORMAT('2018-07-14 14:03:00','%Y%m') =DATE_FORMAT(a.month_integral_day,'%Y%m')  GROUP BY a.integral ORDER BY a.integral DESC LIMIT 0,3

3.使用临时表查询

select b.* from amysky_wx_member_month_integral as b ,(select a.integral as integral  from amysky_wx_member_month_integral as  a where DATE_FORMAT('2018-07-14 14:03:00','%Y%m') =DATE_FORMAT(a.month_integral_day,'%Y%m')  GROUP BY a.integral ORDER BY a.integral DESC LIMIT 0,3) as c where b.integral=c.integral and DATE_FORMAT('2018-07-14 14:03:00','%Y%m') =DATE_FORMAT(b.month_integral_day,'%Y%m') ORDER BY b.integral DESC

到这就是这样 ,也许还有其他的办法,只是没有想起来

mysql 计算每月的前三名(并列也算)

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