Enroll Course: https://www.udemy.com/course/sql-49-section-5/
If you’re looking to elevate your SQL skills, especially in mastering subqueries, the Udemy course ‘실무 SQL 완전정복 – SECTION 5: 하위 쿼리 마스터하기’ is an excellent resource. This course provides a comprehensive deep dive into subqueries, covering everything from basic concepts to advanced techniques. The lessons start with an introduction to what subqueries are and their use cases, making it accessible for beginners yet insightful for seasoned SQL users. It then explores various types of subqueries, including single-row and multi-row subqueries, and explains when and how to use comparison operators, IN/NOT IN clauses, and multi-row operators like ANY, SOME, and ALL. The course further delves into correlated subqueries, nested subqueries, and their application in SELECT, HAVING, and FROM clauses, including inline views. Throughout the lessons, practical examples help reinforce learning, making complex topics easier to grasp. I highly recommend this course for anyone aiming to deepen their understanding of SQL subqueries and improve their query-writing skills for real-world database tasks. The instructor’s clear explanations and structured approach make it a valuable addition to your SQL learning journey.
Enroll Course: https://www.udemy.com/course/sql-49-section-5/