我正在解决查询性能问题。这是来自解释的预期查询计划:mysql>explainselect*fromtable1wheretdcolbetween'2010-04-1300:00'and'2010-04-1403:16';+----+-------------+--------------------+-------+---------------+--------------+---------+------+---------+-------------+|id|select_type|table|type|possible_keys|key|key_len|ref|rows|Ex