Mysql学习总结（57）——MySQL查询当天、本周、本月、上周、本周、上月、距离当前现在6个月数据

--------------查"当天"的数据-----------------

SELECT

ew.orderid,

ew.carid,

ew.userid,

ew.`status`,

ew.reservetime,

ew.starttime,

ew.endtime,

ew.canceltime,

eu.nickname,

        ec.plateid

FROM

evlib_workorder ew

LEFT JOIN evlib_user eu ON eu.userid = ew.userid

LEFT JOIN evlib_car ec ON ec.carid = ew.carid

WHERE

date(ew.reservetime) = curdate()

ORDER BY ew.reservetime DESC;

--------------查"上周"的数据-----------------

SELECT

ew.orderid,

ew.carid,

ew.userid,

ew.`status`,

ew.reservetime,

ew.starttime,

ew.endtime,

ew.canceltime,

eu.nickname,

ec.plateid

FROM

evlib_workorder ew

LEFT JOIN evlib_user eu ON eu.userid = ew.userid

LEFT JOIN evlib_car ec ON ec.carid = ew.carid

WHERE

YEARWEEK(date_format(ew.reservetime, '%Y-%m-%d')) = YEARWEEK(now()) - 1

ORDER BY

ew.reservetime DESC;

--------------查"本周"的数据-----------------

SELECT

ew.orderid,

ew.carid,

ew.userid,

ew.`status`,

ew.reservetime,

ew.starttime,

ew.endtime,

ew.canceltime,

eu.nickname,

ec.plateid

FROM

evlib_workorder ew

LEFT JOIN evlib_user eu ON eu.userid = ew.userid

LEFT JOIN evlib_car ec ON ec.carid = ew.carid

WHERE

YEARWEEK(date_format(ew.reservetime, '%Y-%m-%d')) = YEARWEEK(now())

ORDER BY

ew.reservetime DESC;

--------------查"本月""当前月"的数据-----------------

SELECT

ew.orderid,

ew.carid,

ew.userid,

ew.`status`,

ew.reservetime,

ew.starttime,

ew.endtime,

ew.canceltime,

eu.nickname,

ec.plateid

FROM

evlib_workorder ew

LEFT JOIN evlib_user eu ON eu.userid = ew.userid

LEFT JOIN evlib_car ec ON ec.carid = ew.carid

WHERE

date_format(ew.reservetime,'%Y-%m')=date_format(now(),'%Y-%m')

ORDER BY

ew.reservetime DESC;

--------------查"上个月"的数据-----------------

SELECT

ew.orderid,

ew.carid,

ew.userid,

ew.`status`,

ew.reservetime,

ew.starttime,

ew.endtime,

ew.canceltime,

eu.nickname,

ec.plateid

FROM

evlib_workorder ew

LEFT JOIN evlib_user eu ON eu.userid = ew.userid

LEFT JOIN evlib_car ec ON ec.carid = ew.carid

WHERE

date_format(ew.reservetime,'%Y-%m')=date_format(DATE_SUB(curdate(), INTERVAL 1 MONTH),'%Y-%m')

ORDER BY

ew.reservetime DESC;

--------------查"距离当前现在6个月"的数据-----------------

SELECT

ew.orderid,

ew.carid,

ew.userid,

ew.`status`,

ew.reservetime,

ew.starttime,

ew.endtime,

ew.canceltime,

eu.nickname,

ec.plateid

FROM

evlib_workorder ew

LEFT JOIN evlib_user eu ON eu.userid = ew.userid

LEFT JOIN evlib_car ec ON ec.carid = ew.carid

WHERE

ew.reservetime between date_sub(now(),interval 6 month) and now()

ORDER BY

ew.reservetime DESC;

建表语句如下：
CREATE TABLE `order` (
  `id` INTEGER UNSIGNED NOT NULL AUTO_INCREMENT,
  `order_name` VARCHAR(45) NOT NULL,
  `order_time` DATETIME NOT NULL,
  PRIMARY KEY (`id`)
)
下面根据 order_time 字段来查询各个时间段内的所有记录。
1，查询当天（今天）的数据
SELECT * FROM `order` WHERE TO_DAYS(order_time) = TO_DAYS(NOW())
2，查询昨天的数据
SELECT * FROM `order` WHERE TO_DAYS(NOW()) - TO_DAYS(order_time) = 1
3，查询最近7天的数据（包括今天一共7天）
SELECT * FROM `order` where DATE_SUB(CURDATE(), INTERVAL 7 DAY) < date(order_time)
4，查询最近30天的数据（包括今天一共30天）
SELECT * FROM `order` where DATE_SUB(CURDATE(), INTERVAL 30 DAY) < date(order_time)
5，查询当月（本月）的数据
SELECT * FROM `order` WHERE DATE_FORMAT(order_time, '%Y%m') = DATE_FORMAT(CURDATE(), '%Y%m')
6，查询上个月的数据
SELECT * FROM `order` WHERE PERIOD_DIFF(DATE_FORMAT(NOW(),'%Y%m'), DATE_FORMAT(order_time,'%Y%m')) =1
7，查询本季度的数据
SELECT * FROM `order` WHERE QUARTER(order_time)=QUARTER(NOW())
8，查询上季度的数据
SELECT * FROM `order` WHERE QUARTER(order_time)=QUARTER(DATE_SUB(NOW(),INTERVAL 1 QUARTER))
9，查询当年（今年）的数据
SELECT * FROM `order` WHERE YEAR(order_time)=YEAR(NOW())
10，查询去年的数据
SELECT * FROM `order` WHERE YEAR(order_time)=YEAR(DATE_SUB(NOW(),INTERVAL 1 YEAR))