mysql 递归实现 以及 MYSQL获取当前年、季、月、周第一天、最后一天的日期/时间戳
参考: https://blog.csdn.net/lilizhou2008/article/details/108505353
mysql 存储过程 参考: https://www.cnblogs.com/mark-chan/p/5384139.html
#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);