Subqueries-and-Nested-Queries Objective: Practice using subqueries inside SELECT, WHERE, and FROM clauses to perform advanced data retrieval.

Repository files navigation Task 6: Subqueries and Nested Queries Objective: Practice using scalar, correlated, and nested subqueries in different SQL clauses — SELECT, WHERE, and FROM.

Expressing complex OLAP queries involving nested expressions using normal group-by, aggregation, and joins can be extremely difficult. We propose a technique that translates nested query expressions ...