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Exercise

Comparing values

eSymphony has asked you to look into the differences between composer and artist name. More specifically, they want to know for which Queen tracks these differ. If they are the same a NULL value should appear, and if they differ the artist name should be displayed. This is obviously no challenge for you since you know all about null-related functions.

Instructions
100 XP
  • Display NULL if the artist name and composer are the same and the artist name if they differ.
  • Filter on rows where the artist name is 'Queen'.
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