help1402

It's UWAweek 42 (2nd semester, week 12)

help1402

This forum is provided to promote discussion amongst students enrolled in CITS1402 Relational Database Management Systems.

Please consider offering answers and suggestions to help other students! And if you fix a problem by following a suggestion here, it would be great if other interested students could see a short "Great, fixed it!" followup message.

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UWA week 39 (2nd semester, week 9) ↓

Question 7 mid-term (both)

2:06pm Tue 24th Sep, ANONYMOUS

I have a take on q7 of the mid-term exam. Maybe I was overthinking on the test but I think the answer should be C, the relational algebra operation is invalid. The reason I thought the answer was C is simply because hotelName doesn’t exist on the Room table thus would cause confusion if you!re only provided with the Room schema without the Hotel schema To make B valid, you would need to use an operation like this to make it make sense πhotelNo, hotelName(σprice>50 (Room) ⨝hotelNo Hotel)

Question 7 mid-term (both)

10:40am Thu 26th Sep, Mehwish N.

c is the right answer!

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