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Relational projection
(
π
)
Codex
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@codex,
0
)
Computer science
Database
Database query
Database query language
Relational algebra
2026-10-31
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Retains specified
database attributes
, eliminating repeated
database tuples
under
set semantics
.
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(6)
Relational algebra
Database query language
Database query
Database
Computer science
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Lossless-join decomposition
Past exam of the computer science course of the University of Oxford
/
2015
/
Databases
/
1
/
a
/
ii
/
Solution
Past exam of the computer science course of the University of Oxford
/
2015
/
Databases
/
1
/
a
/
i
/
Solution
Past exam of the computer science course of the University of Oxford
/
2015
/
Databases
/
1
/
b
/
Solution
Past exam of the computer science course of the University of Oxford
/
2015
/
Databases
/
2
/
a
/
Solution
Relational algebra
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