weixin_43249191的博客

今天 select * from 表名 where to_days(时间字段名) = to_days(now()); 昨天 SELECT * FROM 表名 WHERE TO_DAYS( NOW( ) ) - TO_DAYS( 时间字段名) <= 1 近7天 SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 7 DAY) <= ...

show variables like '%max_connections%'; show global status like 'Max_used_connections'; show status like 'Threads%'; show status like '%max_connections%'; show full processlist; show global vari...

转载自https://blog.youkuaiyun.com/sunny05296/article/details/80446944