SQL group by 取最新一条数据
如现有数据：id | name | time1 | aaa | 15662049582 | aaa | 15662049673 | aaa | 15662049894 | bbb | 15662049585 | bbb | 15662049676 | bbb | 15662049897 | ccc | 15662049588 | ccc | 15662049679 | c...
