This exercise demonstrates the use of SQL numeric functions and aggregations to compute the total price per order from a dataset. The query utilizes basic arithmetic operations within aggregate ...

-- you will need to know aggregate functions before attempting the other questions. -- We would like to find the total weight of cats grouped by age. But only return those groups with a total weight ...

BR><BR>Is there a way to use aggregate functions and only group on specific keys, rather than every column? For instance, I have the following query a lot.<BR><BR>Select (lots of junk), Count ...

Today, Codecademy launched a free Learn SQL interactive course that will teach you the basics of tables, queries, aggregate functions ... building on previous exercises. You can also test your ...