The select clause corresponds to the projection operation of the relational algebra. It is used to list the attributes desired in the result of a query. For example, the query select name, age from student will return the name and age attributes of all tuples in the student relation12. References: 1: CSE132A F05 SQLpart1 - University of California, San Diego 2: Basic Operations - RDBMS Questions and Answers - Sanfoundry
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