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 UWA week 32 (2nd semester, week 3) ↓
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2:34pm Tue 6th Aug, ANONYMOUS

Dear, In week 3, we have learnt about Relational Algebra such as selection, projection, etc. Do we have to remember how to write the relations using those symbols/operations (U, up-side-down U, big Pi, sigma, etc..) or we just need to focus on SQL queries? For example, do we have to know how to write these: - R U S - Pcol1, . . . , coln(R) - rR(myCount) ÁCOUNT propertyNo (σrent > 350 (PropertyForRent)) ... *(I just copy from the slides, you can check the attachments to be clearer) Regards,

The University of Western Australia

Computer Science and Software Engineering

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