An operator is basically a join followed by a project on the attributes of first relation is known a...........

Computer GK DBMS

An operator is basically a join followed by a project on the attributes of first relation is known as _______ .

Join

Inner Join

Full Join

Semi-Join

- Understanding Semi-Join:

- A semi-join combines the functionality of a join and a projection.

- It takes attributes from the first relation and filters based on matches with the second.

- Designed to reduce data size and be more efficient than traditional joins.

- Option Analysis:

- Option 1 - Join: It refers to a simple combining operation, doesn’t implicitly include projection.

- Option 2 - Inner Join: Returns rows with matching values but doesn’t specifically project.

- Option 3 - Full Join: Lists all records from both tables with matching rows, without projection focus.

- Option 4 - Semi-Join: Fits exact description of join followed by project.

- The correct answer is Semi-Join.

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