SQL | Archived exercise | Show events by decade

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 on the relevant Wise Owl classroom training course (sadly for the moment only in the UK).

Software ==> SQL  (198 exercises)
Version ==> Any version of SQL Server
Topic ==> Archived  (70 exercises)
Level ==> Harder than average
Before you can do this exercise, you'll need to download and unzip this file (if you have any problems doing this, click here for help).

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If you haven't already got it set up in SQL server, restore the Historical Events database from the above folder.

Create a query to show the number of events for each decade:

SQL exercise - Aggregation and grouping (image 1)

The decade names have been chosen to ensure that they appear in the correct order in our query

You'll need a  fairly long CASE statement to do this, and a fair bit of patience.

Save this query as Events by decade, 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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