mysql慢查询优化之explain的各列含义
摘要:
mysql> explain select customer_id,first_name,last_name from customer;+----+-------------+----------+------+---------------+------+---------+------+---... 阅读全文
posted @ 2014-12-17 23:21 walter371 阅读(399) 评论(0) 推荐(0)