Mysql之EXPLAIN命令查看SQL执行计划
1、EXPLAIN介绍[root@VM_0_5_centos ~]# mysqldumpslow -a /var/log/mariadb/slow_query_log.txtReading mysql slow query log from /var/log/mariadb/slow_query_log.txtCount: 4 Time=21.46s (85s) Lock=0.00...
