Mathematics, 09.02.2021 01:00 20stirltrer

The first relation indicates the bars each drinker visits, the second tells what beers each bar serves, and the last indicates which beer each drinker likes to drink. Express the following queries in relational algebra. If joins are needed, indicate what the condition of the join is: (1) Find the bars that serve a beer that drinker Smith likes. (2) Find the bars that serve all beers that drinker Smith likes.

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The first relation indicates the bars each drinker visits, the second tells what beers each bar serv...