mysql减去一天与减去一个小时
减去一天
SELECT DATE_SUB(CURDATE(), INTERVAL 1 DAY);
减去一个小时
hour(now())-1
减去一天
SELECT DATE_SUB(CURDATE(), INTERVAL 1 DAY);
减去一个小时
hour(now())-1
DELETE t1 FROM invest_year t1, invest_year t2 WHERE t1.pro_id = t2.pro_id AND t1.pro_year = t...
mysql> select CONCAT('My', 'S', 'QL');...
DATE_ADD(now(),INTERVAL 1 DAY);...
1.date型转换成int型 UNIX_TIMESTAMP('2007-10-04 22:23:00') 2.int型转换成date型 FROM_UNIXTIME(97599...
select count(id),字段from 表名 group by字段 having count(字段)>1;...
SELECT CURDATE()当天日期...