mysql浮点型输出格式问题:mysql drop table if exists d;create table d(c double) engine=innodb;insert into d values(1e-15),(1e-16);select * from d;在mysql数据库按以上语句建表，输出结果如下：+-------------------+| c |+-------------------+| 0.000000000000001 1e-16 |+----------------