选择某年-月-日的数据，lc_datetime数据类型为datetime

$t1 = date("Y-m-d");

DATE_FORMAT(lc_datetime,'%Y-%m-%d')='{$t1}'

选择某1：年-月-日 - 某2：年-月-日之间的数据

– 查询指定时间段的数据

select fullName,addedTime FROM t_user where addedTime between '2017-1-1 00:00:00' and '2018-1-1 00:00:00';

select fullName,addedTime FROM t_user where addedTime >='2017-1-1 00:00:00' and addedTime < '2018-1-1 00:00:00';

查询某个时间段的数据（半闭半开区间）

包含5，不包含8

SELECT check_type,create_time FROM attendance WHERE create_time between '2019-11-05' and '2019-11-08';

查询某个时间段的数据（闭区间）

包含5，也包含8

SELECT check_type,create_time FROM attendance WHERE date_format(create_time,'%Y-%m-%d') between '2019-11-05' and '2019-11-08';

其他一些语句

-- 今天

select fullName,addedTime from t_user where to_days(addedTime) <= to_days(now());

-- 昨天

select fullName,addedTime from t_user where to_days(NOW()) - TO_DAYS(addedTime) <= 1;

-- 近7天

select fullName,addedTime from t_user where date_sub(CURDATE(),INTERVAL 7 DAY) <= DATE(addedTime);

-- 近30天

SELECT fullName,addedTime FROM t_user where DATE_SUB(CURDATE(), INTERVAL 30 DAY) <= date(addedTime);

-- 本月

SELECT fullName,addedTime FROM t_user WHERE DATE_FORMAT( addedTime, '%Y%m' ) = DATE_FORMAT( CURDATE() , '%Y%m' );

-- 上一月

SELECT fullName,addedTime FROM t_user WHERE PERIOD_DIFF( date_format( now( ) , '%Y%m' ) , date_format( addedTime, '%Y%m' ) ) =1;

-- 查询本季度数据

select fullName,addedTime FROM t_user where QUARTER(addedTime)=QUARTER(now());

-- 查询上季度数据

select fullName,addedTime FROM t_user where QUARTER(addedTime)=QUARTER(DATE_SUB(now(),interval 1 QUARTER));

-- 查询本年数据

select fullName,addedTime FROM t_user where YEAR(addedTime)=YEAR(NOW());

-- 查询上年数据

select fullName,addedTime FROM t_user where year(addedTime)=year(date_sub(now(),interval 1 year));

-- 查询距离当前现在6个月的数据

select fullName,addedTime FROM t_user where addedTime between date_sub(now(),interval 6 month) and now();

-- 查询当前这周的数据

SELECT fullName,addedTime FROM t_user WHERE YEARWEEK(date_format(addedTime,'%Y-%m-%d')) = YEARWEEK(now());

-- 查询上周的数据

SELECT fullName,addedTime FROM t_user WHERE YEARWEEK(date_format(addedTime,'%Y-%m-%d')) = YEARWEEK(now())-1;

-- 查询上个月的数据

select fullName,addedTime FROM t_user where date_format(addedTime,'%Y-%m')=date_format(DATE_SUB(curdate(), INTERVAL 1 MONTH),'%Y-%m');

-- 查询当前月份的数据

select fullName,addedTime FROM t_user where DATE_FORMAT(addedTime,'%Y%m') = DATE_FORMAT(CURDATE(),'%Y%m');

select fullName,addedTime FROM t_user where date_format(addedTime,'%Y-%m')=date_format(now(),'%Y-%m');

-- 查询指定时间段的数据

select fullName,addedTime FROM t_user where addedTime between '2017-1-1 00:00:00' and '2018-1-1 00:00:00';

select fullName,addedTime FROM t_user where addedTime >='2017-1-1 00:00:00' and addedTime < '2018-1-1 00:00:00';