Dear list,

I'm faced with an interesting and challenging problem.

Consider a database, designed for a hotel.
At any given time, each room has a different status: It's Busy or Reserved,
or Free.

It's easy to retrieve number of Free rooms at the current time.
But how can I count the number of rooms that were busy during the last week

I would appreciate if you take a brief moment of your time and share your

Thank you in advance,

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