Question

What operation is a selection operation?​

Answer 1

Explanation:

Selects all tuples (records) that satisfy the selection condition from a relation R (or an expression). It filters records according to the condition. It deals with the tuples (records) of a relation. In SQL, the selection operation is specified in WHERE clause of the query.

Answer 2

Answer:Selects all tuples (records) that satisfy the selection condition from a relation R (or an expression). It filters records according to the condition. It deals with the tuples (records) of a relation. In SQL, the selection operation is specified in WHERE clause of the query.