我在编写sql时遇到问题,从表中获取可用的房间.我的表格结构如下.
表:预订
booking_id | room_id | start_datetime | end_datetime | customer_id
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001 | 1 | 12-09-2012 2:35pm | 14-09-2012 9:00am | 23
002 | 2 | 10-09-2012 1:00am | 20-09-2012 9:00am | 20
003 | 4 | 09-09-2012 1:35pm | 21-09-2012 9:00am | 43
004 | 1 | 22-09-2012 2:35pm | 24-09-2012 9:00am | 9
005 | 3 | 12-09-2012 9:00am | 13-09-2012 9:00am | 53
006 | 6 | 15-09-2012 9:00am | 19-09-2012 9:00am | 27
表:房间
包含房间的详细信息,表格的主键是room_id,它有10个房间,从1-10. …