SQL Basic To Advance | Subqueries & Query Optimisation

In this video, I am going to share with you various ways to write a SQL subquery and also explain how to optimize the query. SQL subqueries can be a bit tricky to master, but with the right techniques, you can easily write efficient and effective subqueries.
I will start by explaining what a subquery is and why it is used. Then, I will dive into the different types of subqueries, including correlated and non-correlated subqueries. I will also show you how to use subqueries in different clauses, such as the WHERE, FROM, and SELECT clauses.
Once you have a good understanding of the different types of subqueries, I will show you how to optimize your queries for better performance. This includes using indexes, avoiding unnecessary subqueries, and using the EXISTS operator instead of IN.
By the end of this video, you will have a solid understanding of how to write SQL subqueries and how to optimize them for better performance. Whether you are a beginner or an experienced SQL developer, this video will provide you with valuable insights and techniques to improve your SQL skills. So, sit back, relax, and let's dive into the world of SQL subqueries!
00:31 Query Optimisation
03:44 Various Ways To Write A Subquery
Follow us on LinkedIn: / ssumitshukla
Follow us on Instagram: @SessionWithSumit
#sql #mysql #sqltutorial