IT & Software → SQL → Joins and Subqueries → Introduction to Joins and Subqueries

Overview

In this lesson, we will explore Joins and Subqueries in SQL. Joins allow you to combine data from two or more tables based on related columns. Subqueries are queries nested inside another query, helping you to perform complex data retrieval. Understanding these concepts is essential for effective database management and data analysis.

📚 Key Learning Objectives

  • ✓ Define what a Join is in SQL.
  • ✓ Explain the different types of Joins.
  • ✓ Identify when to use a Subquery.
  • ✓ Write basic SQL queries using Joins.
  • ✓ Construct Subqueries to filter data.