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SQL Basics in PostgreSQL

Introduction
1. Introduction
Very simple subqueries
Subqueries with multiple results
Correlated subqueries
Other subqueries

Instruction

Hello! So far you've learned to build simple queries with lots of additional clauses.

You will now get to know subqueries. They are a powerful tool which will help you build complex instructions. Ready, steady – go!

Exercise

Click the Next exercise button to continue.