Complete the sentence to explain what relational algebra provides.
Relational algebra provides a set of [1] to manipulate data in tables.
Relational algebra defines operations like selection and projection to work with data tables.
Complete the sentence to describe the role of relational algebra in query languages.
Relational algebra serves as the [1] for SQL and other query languages.
Relational algebra is the foundation that supports how query languages like SQL work.
Fix the error in the sentence about relational algebra's properties.
Relational algebra is [1] because it always produces a new relation as output.
Relational algebra is closed because its operations take relations as input and produce relations as output.
Fill both blanks to complete the explanation of relational algebra's importance.
Relational algebra allows us to [1] data and [2] queries logically.
Relational algebra lets us manipulate data and express queries in a clear, logical way.
Fill all three blanks to complete the statement about relational algebra's role in databases.
The [1] of relational algebra is to provide a [2] set of [3] for querying data.
The purpose of relational algebra is to provide a complete set of operations for querying data effectively.