Questions and Answers
What is the primary purpose of relational algebra?
To provide a theoretical foundation for relational databases
In relational algebra, what does the project operation do?
Selects a subset of columns from a relation
Which operation in relational algebra is used to combine tuples from two relations based on a related attribute?
Join
Study Notes
Relational Algebra
- The primary purpose of relational algebra is to provide a formal system for manipulating relational databases.
Operations in Relational Algebra
- The project operation (π) selects only specific columns from a relation.
- The join operation (⋈) combines tuples from two relations based on a related attribute, allowing data to be merged from multiple tables.
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