Learn how to easily fix the your query does not include the specified expression as part of an aggregate function SQL error.

Learn what aggregate functions are, how to use them in SQL queries, and why they are useful for BI. Find examples of common scenarios and calculations.

This repository contains a collection of SQL queries demonstrating the use of aggregate functions and SQL clauses as part of a database assignment.

Oracle, SQL Server, Postgres, DB2 - the list goes on.<BR><BR>The reality is you have to restructure your query. A CTE isn't necessary, but will likely make the query more readable.

SQL window functions provide extremely powerful and useful features that let you work with observations more easily. Different types explained here.

We worked together to practice and apply SQL techniques effectively. This repository reflects our teamwork and shared learning! Combining conditions and sorting data to produce relevant query outputs.