EXISTS Operator
Explore the EXISTS boolean operator to determine the presence of rows returned by subqueries. Understand how to use EXISTS and NOT EXISTS in SQL nested queries, and learn practical examples to filter data based on subquery results.
We'll cover the following...
We'll cover the following...
In this lesson we’ll learn about the boolean operator EXISTS and its complement, NOT EXISTS. The EXISTS operator is usually used to test if a subquery returns any rows or none at all.
Connect to the terminal below by clicking in the widget. Once connected, the command line prompt will show up. Enter or copy and paste the command ...