摘要：apache commons工具类库 Maven依赖： <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>3.12.0</version> </depe 阅读全文

摘要：业务需求：电话号码相同的，根据时间取最新一条数据 select * from b_guest_info a where create_at = (select max(create_at) from b_guest_info b where a.mobile = b.mobile) order by 阅读全文