标签:diff date_sub dual curd ediff mysq 最后一天 cat last
select curdate(); --获取当前日期
select last_day(curdate()); --获取当月最后一天。
select DATE_ADD(curdate(),interval -day(curdate())+1 day); --获取本月第一天
select date_add(curdate()-day(curdate())+1,interval 1 month); -- 获取下个月的第一天
select DATEDIFF(date_add(curdate()-day(curdate())+1,interval 1 month ),DATE_ADD(curdate(),interval -day(curdate())+1 day)) from dual; --获取当前月的天数
#当年第一天:
SELECT DATE_SUB(CURDATE(),INTERVAL dayofyear(now())-1 DAY);
#当年最后一天:
SELECT concat(YEAR(now()),‘-12-31‘);
#当前week的第一天:
select date_sub(curdate(),INTERVAL WEEKDAY(curdate()) + 1 DAY);
#当前week的最后一天:
select date_sub(curdate(),INTERVAL WEEKDAY(curdate()) - 5 DAY);
#前一week的第一天:
select date_sub(curdate(),INTERVAL WEEKDAY(curdate()) + 8 DAY);
#前一week的最后一天:
select date_sub(curdate(),INTERVAL WEEKDAY(curdate()) + 2 DAY);
#前两week的第一天:
select date_sub(curdate(),INTERVAL WEEKDAY(curdate()) + 15 DAY);
#前两week的最后一天:
select date_sub(curdate(),INTERVAL WEEKDAY(curdate()) + 9 DAY);
#当前month的第一天:
SELECT concat(date_format(LAST_DAY(now()),‘%Y-%m-‘),‘01‘);
#当前month的最后一天:
SELECT LAST_DAY(now());
#前一month的第一天:
SELECT concat(date_format(LAST_DAY(now() - interval 1 month),‘%Y-%m-‘),‘01‘);
#前一month的最后一天:
SELECT LAST_DAY(now() - interval 1 month);
#前两month的第一天:
SELECT concat(date_format(LAST_DAY(now() - interval 2 month),‘%Y-%m-‘),‘01‘);
#前两month的最后一天:
SELECT LAST_DAY(now() - interval 2 month);
#当前quarter的第一天:
select concat(date_format(LAST_DAY(MAKEDATE(EXTRACT(YEAR FROM CURDATE()),1) + interval QUARTER(CURDATE())*3-3 month),‘%Y-%m-‘),‘01‘);
#当前quarter的最后一天:
select LAST_DAY(MAKEDATE(EXTRACT(YEAR FROM CURDATE()),1) + interval QUARTER(CURDATE())*3-1 month);
#前一quarter的第一天:
select concat(date_format(LAST_DAY(MAKEDATE(EXTRACT(YEAR FROM CURDATE()),1) + interval QUARTER(CURDATE())*3-6 month),‘%Y-%m-‘),‘01‘);
#前一quarter的最后一天:
select LAST_DAY(MAKEDATE(EXTRACT(YEAR FROM CURDATE()),1) + interval QUARTER(CURDATE())*3-4 month);
#前两quarter的第一天:
select concat(date_format(LAST_DAY(MAKEDATE(EXTRACT(YEAR FROM CURDATE()),1) + interval QUARTER(CURDATE())*3-9 month),‘%Y-%m-‘),‘01‘);
#前两quarter的最后一天:
select LAST_DAY(MAKEDATE(EXTRACT(YEAR FROM CURDATE()),1) + interval QUARTER(CURDATE())*3-7 month);
标签:diff date_sub dual curd ediff mysq 最后一天 cat last
原文地址:https://www.cnblogs.com/ruozhu/p/9073083.html