1.查找表中多余的重复记录,重复记录是根据单个字段(ipaddr_to_long)来判断 SELECT * FROM ips WHERE ipaddr_to_long IN (SELECT ipaddr_to_long FROM ips GROUP BY ipaddr_to_long HAVING COUNT(ipaddr_to_long) > 1) 2.去重 留ID最小的数据DELETE FROM ips a WHERE (a.ipaddr_to_long) IN...【阅读全文】
连不上mysql时一般有以下四种报错:1:Can't connect to MySQL server2:Lost connection to MySQL server3:Sorry, due to line fault, temporarily unable to browse, we are dealing with.4:MySQL server has gone away一:Can't connect to MySQL server 可能的原因:1,mysql服务端没有启起来2,网络不通(ipta...【阅读全文】