我有一个有趣的要求，希望有人能指导我们实现结果！ TIA。
表格
Student Date & Time ClassAttended Session
Joel 07/20 10:00AM YES Single
Joel 07/21 10:00AM NO Single
Joel 07/22 10:00AM YES Multiple
Joel 07/20 11:00AM NO Multiple
Joel 07/20 02:00PM YES Multiple
Joel 07/20 03:00PM NO Multiple
期望的结果：
Student Date & Time ClassAttended Session
Joel 07/21 10:00AM NO Single
Joel 07/22 11:00AM NO Multiple
Joel 07/22 03:00PM NO Multiple
我的目标是提出以上结果，无论有没有Session列的存在！