SQL | Basic joins exercise | Create multiple joins to show the shortest Doctor Who episodes

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You can learn how to do this exercise if you attend the course listed below!

Software ==> SQL  (198 exercises)
Version ==> Any version of SQL Server
Topic ==> Basic joins  (8 exercises)
Level ==> Harder than average
Course ==> Introduction to SQL
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If you haven't already done so, run the script in the above folder to generate the Doctor Who database.

Create a query to list out the appearances of enemies in episodes which have length under 40 characters, where the length is defined as the sum of:

  • the number of characters in the author's name;
  • the number of characters in the episode's title;
  • the number of characters in the doctor's name; and
  • the number of characters in the enemy's name.

This should reveal two episodes:

Two shortest episodes

The two episodes which make it under the very low bar.

You are now a master (or mistress) of joins!  Save this as Time for a coffee, then close it down.

You can unzip this file to see the answers to this exercise, although please remember this is for your personal use only.
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hjay629   Reply to hjay629Reply
19 Feb 19 at 21:43

For Amy's choice my enemy name says 'Winifred GillyFlower'.

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