Learn what subqueries are, how to use them in SQL queries, and some best practices to follow. Subqueries can help you simplify complex queries, filter data, perform calculations, and join tables.

Subqueries can help you simplify your SQL code and avoid repeating the same logic or calculations. For example, you can use a subquery to find the average salary of all employees and then compare ...

The goal of this project is to answer specific questions about the sales data using subqueries. The SQL queries and their results are provided in the SQL file included in this repository. What Are ...

Using a Pass-Through Query in a Subquery The next example shows how to use a subquery that contains a Pass-Through query. A subquery is a nested query and is usually part of a WHERE or HAVING clause.