help1402

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help1402

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UWA week 36 (2nd semester, mid-semester break) ↓

Lab 04 - Question 05 (all 8)

8:06pm Fri 6th Sep, Yufang W.

It seems like sqlite doesn't allow parenthesis for select statement when performing UNION/EXCEPT/INTERSECT operators? Without parenthesis, after UNION we get IRN and IWS, next it will perform EXCEPT and the result will be IWS, lastly it will do INTERSECT so the final results it returns is IWS.

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