A subquery is a query that is nested inside another query. It can be used to filter, aggregate, or calculate data from one or more tables. A subquery can return a single value, a list of values ...

In this exercise, you'll see how some queries can be written using either a join or a subquery. You have seen previously how to use GROUP BY with aggregate functions and an inner join to get ...

Learn how to use the SQL subselect statement and handle your database like a pro! Do you ever find yourself juggling queries to get the information you need? Subselects, also called subqueries ...

SQL provides several different statements ... One important consideration when using subqueries is performance. Convenience comes at a price, and depending on the size, number, and complexity ...

This project demonstrates how to use subqueries in Google BigQuery to analyze sales performance across multiple dimension tables. Specifically, it answers the question: "How many Lenovo products were ...

The outer PROC SQL query retrieves data from the view descriptor; the subquery uses a Pass-Through query to retrieve data. This query returns the names of employees who earn less than the average ...