首先,非常感谢您关注此问题。从查询表中推导出时钟数据的SQL查询
我们有记录的实验室工作人员的活动表叫措施如下图所示:
╔════╦═════════╦═════════════════════╦═════════════════════╦═════════╦══════════════╗ ║ id ║ staf_id ║ start_time ║ stop_time ║ task_id ║ fruit_tested ║ ╠════╬═════════╬═════════════════════╬═════════════════════╬═════════╬══════════════╣ ║ 1 ║ 123 ║ 2016-06-01 10:00:00 ║ 2016-06-01 13:15:00 ║ 1 ║ 90 ║ ║ 2 ║ 123 ║ 2016-06-01 15:20:00 ║ 2016-06-01 18:30:00 ║ 2 ║ 60 ║ ║ 3 ║ 333 ║ 2016-06-02 10:30:30 ║ 2016-06-02 15:45:00 ║ 1 ║ 30 ║ ║ 4 ║ 333 ║ 2016-06-03 09:00:00 ║ 2016-06-03 09:45:00 ║ 1 ║ 60 ║ ║ 5 ║ 555 ║ 2016-06-01 07:00:00 ║ 2016-06-01 11:15:00 ║ 1 ║ 90 ║ ║ 6 ║ 555 ║ 2016-06-01 11:30:00 ║ 2016-06-01 13:00:00 ║ 1 ║ 30 ║ ║ 7 ║ 123 ║ 2016-06-02 10:00:00 ║ 2016-06-02 14:00:00 ║ 3 ║ 30 ║ ║ 8 ║ 333 ║ 2016-06-03 10:20:00 ║ 2016-06-03 13:15:15 ║ 1 ║ 30 ║ ║ 9 ║ 333 ║ 2016-06-04 07:50:20 ║ 2016-06-04 12:30:50 ║ 1 ║ 60 ║ ║ 10 ║ 555 ║ 2016-06-03 05:30:00 ║ 2016-06-03 10:00:00 ║ 1 ║ 60 ║ ║ 11 ║ 123 ║ 2016-06-03 06:00:00 ║ 2016-06-03 10:30:30 ║ 4 ║ 90 ║ ║ 12 ║ 123 ║ 2016-06-03 12:15:04 ║ 2016-06-03 12:45:50 ║ 5 ║ 90 ║ ║ 13 ║ 123 ║ 2016-06-03 17:10:00 ║ 2016-06-03 19:00:00 ║ 1 ║ 30 ║ ║ 14 ║ 123 ║ 2016-06-04 12:15:04 ║ 2016-06-04 15:00:00 ║ 1 ║ 30 ║ ║ 15 ║ 123 ║ 2016-06-04 15:10:00 ║ 2016-06-04 15:30:00 ║ 2 ║ 90 ║ ╚════╩═════════╩═════════════════════╩═════════════════════╩═════════╩══════════════╝
目前,我们有一个问题与我们的实际时钟进度表,作为临时解决方案,我想找回每个工作人员从度量表中获取实时时钟详细信息,其中clock_in将是第一个度量值.start_time为当天,clock_out为该工作人员当天的最后一个度量值.stop_time,如下所示:
╔══════════╦═════════════════════╦═════════════════════╗ ║ staff_id ║ clock_in ║ clock_out ║ ╠══════════╬═════════════════════╬═════════════════════╣ ║ 123 ║ 2016-06-01 10:00:00 ║ 2016-06-01 18:30:00 ║ ║ 123 ║ 2016-06-02 10:00:00 ║ 2016-06-02 14:00:00 ║ ║ 123 ║ 2016-06-03 06:00:00 ║ 2016-06-03 19:00:00 ║ ║ 123 ║ 2016-06-04 12:15:04 ║ 2016-06-04 15:30:00 ║ ║ 333 ║ 2016-06-02 10:30:30 ║ 2016-06-02 15:45:00 ║ ║ 333 ║ 2016-06-03 09:00:00 ║ 2016-06-03 13:15:15 ║ ║ 333 ║ 2016-06-04 07:50:20 ║ 2016-06-04 12:30:50 ║ ║ 555 ║ 2016-06-01 07:00:00 ║ 2016-06-01 13:00:00 ║ ║ 555 ║ 2016-06-03 05:30:00 ║ 2016-06-03 10:00:00 ║ ╚══════════╩═════════════════════╩═════════════════════╝
我该如何达到有这个结果吗?任何建议将深表感谢。
所以,你要为每个用户每个 – Strawberry