mysql的字符串连接符
mysql> select CONCAT('My', 'S', 'QL');
mysql -h ***.***.***.*** -P 3306 -u root -pmysqldump -h ***.***.***.*** -P 3...
DATE_ADD(now(),INTERVAL 1 DAY);...
select count(id),字段from 表名 group by字段 having count(字段)>1;...
SELECT CURDATE()当天日期...
减去一天SELECT DATE_SUB(CURDATE(), INTERVAL 1 DAY);减去一个小时hour(now())-1...
SELECT * FROM shop_count WHERE DATE(count_date)=current_date(); SELECT * FROM sho...