Description
In this course, you will learn the fundamentals of subqueries and how to use them effectively in your MySql, PostgreSQL, or MS SQL Server SQL statements. You will learn about different types of subqueries, including correlated and uncorrelated subqueries, and how to use them to solve complex problems. You will also learn about common pitfalls to avoid when working with subqueries, and how to optimize their performance in your queries. By the end of this course, you will have a solid understanding of how to use subqueries in your SQL statements, and be able to apply this knowledge to a wide range of real-world scenarios. In this Course you will Learn to: Know and understand subqueries. Identify subqueries in SQL. Use subqueries in your select statement to make your queries more robust and less reliant on hard coded values. Harness the power of derived tables to work around SQL limitations. Derived tables are also known as subqueries in the FROM clause. Use subqueries in the WHERE clause with EXISTS and INUse subqueries with SUM, MAX and other Aggregate functions in GROUP BY and HAVING. Write correlated subqueries so that your subquery is able work with the outer query to become more flexible and robust. Nothing is worse thanBeing excited to learn something new but not knowing where to start. Wasting time learning the wrong features. Being overwhelmed with options and not know which to use. Imagine Having... Knowledge - Knowing how to quickly use subqueries to take your SQL to the next level. Confidence - Feeling good that you're on the right track. Accomplishment - Having a sense of accomplishment that you've learned something most cannot. Fun - Actually having fun learning SQL subqueries! By the time you've completed this SQL course you'll have an appreciation of subqueries, overcome your fear, and able to write correlated queries to make your SQL more robust.
