-- 为日期增加一个时间间隔：date_add()
SELECT NOW();
SELECT DATE_ADD(NOW(),INTERVAL -1 YEAR);
SELECT DATE_ADD(NOW(),INTERVAL -1 MONTH);
SELECT DATE_ADD(NOW(),INTERVAL 28 DAY);
SELECT DATE_ADD(NOW(),INTERVAL -6 HOUR);
SELECT DATE_ADD(NOW(),INTERVAL -999 MINUTE);
SELECT DATE_ADD(NOW(),INTERVAL 23 SECOND);
SELECT DATE_ADD(NOW(),INTERVAL 2 MICROSECOND);
SELECT DATE_ADD(NOW(),INTERVAL 1 WEEK);
SELECT DATE_ADD(NOW(),INTERVAL 0 QUARTER);
-- 为日期减去一个时间间隔：date_sub()
SELECT DATE_SUB(NOW(),INTERVAL 1 YEAR);
SELECT DATE_SUB(NOW(),INTERVAL 1 MONTH);
SELECT DATE_SUB(NOW(),INTERVAL 1 DAY);
SELECT DATE_SUB(NOW(),INTERVAL 1 HOUR);
SELECT DATE_SUB(NOW(),INTERVAL 1 MINUTE);
SELECT DATE_SUB(NOW(),INTERVAL 1 SECOND);
SELECT DATE_SUB(NOW(),INTERVAL 1 MICROSECOND);
SELECT DATE_SUB(NOW(),INTERVAL 1 QUARTER);
-- 给定一个日期date，返回一个从年份为0开始的天数 ：TO_DAYS()
SELECT TO_DAYS("0000-01-01");
SELECT TO_DAYS(NOW());
-- 截取数据库某一列字段中的一部分 SUBSTR()
SELECT SUBSTR(NOW(),1,13);
-- 今天
select * from 表名 where to_days(时间字段名) = to_days(now());
-- 昨天
SELECT * FROM 表名 WHERE TO_DAYS( NOW( ) ) - TO_DAYS( 时间字段名) <= 1
-- 近7天
SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 7 DAY) <= date(时间字段名)
-- 近30天
SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 30 DAY) <= date(时间字段名)
-- 本月
SELECT * FROM 表名 WHERE DATE_FORMAT( 时间字段名, '%Y%m' ) = DATE_FORMAT( CURDATE( ) , '%Y%m' )
-- 上个月
SELECT * FROM 表名 WHERE PERIOD_DIFF( date_format( now( ) , '%Y%m' ) , date_format( 时间字段名, '%Y%m' ) ) =1
-- 查询本季度数据
select * from `ht_invoice_information` where QUARTER(create_date)=QUARTER(now());
-- 查询上季度数据
select * from `ht_invoice_information` where QUARTER(create_date)=QUARTER(DATE_SUB(now(),interval 1 QUARTER));
-- 查询本年数据
select * from `ht_invoice_information` where YEAR(create_date)=YEAR(NOW());
-- 查询上年数据
select * from `ht_invoice_information` where year(create_date)=year(date_sub(now(),interval 1 year));
-- 查询本周数据
SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,'%Y-%m-%d')) = YEARWEEK(now());
-- 查询上周数据
SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,'%Y-%m-%d')) = YEARWEEK(now())-1;
-- 查询上月数据
select name,submittime from enterprise where date_format(submittime,'%Y-%m')=date_format(DATE_SUB(curdate(), INTERVAL 1 MONTH),'%Y-%m') select * from user where DATE_FORMAT(pudate,'%Y%m') = DATE_FORMAT(CURDATE(),'%Y%m') ; select * from user where WEEKOFYEAR(FROM_UNIXTIME(pudate,'%y-%m-%d')) = WEEKOFYEAR(now()) select * from user where MONTH(FROM_UNIXTIME(pudate,'%y-%m-%d')) = MONTH(now()) select * from user where YEAR(FROM_UNIXTIME(pudate,'%y-%m-%d')) = YEAR(now()) and MONTH(FROM_UNIXTIME(pudate,'%y-%m-%d')) = MONTH(now()) select * from user where pudate between 上月最后一天 and 下月第一天
-- 查询本月数据
select name,submittime from enterprise where date_format(submittime,'%Y-%m')=date_format(now(),'%Y-%m')
-- 查询距离当前时间6个月的数据
select name,submittime from enterprise where submittime between date_sub(now(),interval 6 month) and now();
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