Removing duplicates
Let's dig a little bit deeper into the database. You want to find out which composers have written a song that is sold by eSymphony.
Since composers can write multiple songs, your results will probably include many duplicate values. If you want to select all unique values from a column, you can use the DISTINCT keyword.
This exercise is part of the course
Introduction to Oracle SQL
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
-- Select the composers from the track table
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