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-1 votes
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Intuition for a projection in tuple relational calculus

Let's have a relation $R = (name, surname, age)$. I want to obtain a new relation with only the $name$ attribute. In relational algebra I would simply do $\Pi_{\mathrm{name}}(R)$ but in relational cal …
tomashauser's user avatar
1 vote
0 answers
885 views

Division in tuple relational calculus

$ \newcommand{\Set}[2]{% \{\, #1 \mid #2 \, \}% }$ I've been trying to find how to express relational division operation in tuple relational calculus. The only thing I found is this presentation whe …
tomashauser's user avatar
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0 answers
994 views

Is it possible to convert any relational algebra expression into a relational calculus expre...

Let's for the sake of simplicity only focus on tuple relational calculus. Every relational algebra query can be broken down into the 5 atomic operations - projection, selection, set union, set differe …
tomashauser's user avatar