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

This exercise is provided to allow potential course delegates to choose the correct Wise Owl Microsoft training course, and may not be reproduced in whole or in part in any format without the prior written consent of Wise Owl.

You can learn how to do this exercise if you attend one of more of the courses listed below!

Software ==> SQL  (198 exercises)
Version ==> Any version of SQL Server
Topic ==> Basic joins  (8 exercises)
Level ==> Harder than average
Courses ==> Introduction to SQL  /  Fast-track 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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