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magik-demo:user:school-example [2013/05/14 19:43] admin [Introduction] |
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Query Q4 returns a pupil if such a pupil learns French language. Each pupil will be returned at most once, considering ''DISTINCT'' command in the | Query Q4 returns a pupil if such a pupil learns French language. Each pupil will be returned at most once, considering ''DISTINCT'' command in the | ||
- | ''SELECT''. In this case appearance of ''l2'' is absolute superfouls. | + | ''SELECT''. In this case appearance of ''l2'' is absolute superfouls. |
On the other hand, query Q5 returns each | On the other hand, query Q5 returns each |