MySQL EXPLAIN结果集分析 - 附带大量案例

结果集分复制+----+-------------+-------+------------+------+---------------+------+---------+------+--------+----------+-------+ | id | select_type | table | partitions | type | possible_keys | key  | key_len | ref  | rows   | filtered | Extra |  +----+-------------+-------+------------+------+---------------+------+---------+------+--------+----------+-------+ 1.2.3.