查询重复数据mysql
select count(id),字段from 表名 group by字段 having count(字段)>1;
SELECT * FROM **** WHERE trim(字段名) REGEXP '[^0-9]'=1...
SELECT * FROM shop_count WHERE DATE(count_date)=current_date(); SELECT * FROM sho...
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 -h ***.***.***.*** -P 3306 -u root -pmysqldump -h ***.***.***.*** -P 3...
MySQL不能存储emoji解决方法,将utf8改成utf8mb4网上很多教程都不能解决问题真正能解决问题的方案如下:1、登录宝塔面板,找到:软件商店-已安装-MySQL(需要升级到5.3以上)-设置...