Access | Joins exercise | Joins - company to billionaire

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 ==> Access  (66 exercises)
Version ==> Access 2010 and later
Topic ==> Joins  (4 exercises)
Level ==> Average difficulty
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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Open the database in the above folder.

Create a query showing the number of countries which appear in the Biggest Companies table and not in the Billionaires table.  This is harder than it looks, as you will have to apply grouping to get only the unique countries to appear:

Access 2010 exercise - Joins (image 1)

There are more discrepancies than this, but after stripping out duplicates you get these six countries

Save this query as JoinByCompany.

Create another query showing the number of countries which appear in the Billionaires table but not in the Biggest Companies table:

Access 2010 exercise - Joins (image 2)

Billionaires are more widely distributed geographically than successful companies?

Save this query as JoinByBillionaire, then close it and the database 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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