WISE OWL EXERCISES
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.
The answer to the exercise will be included and explained if you attend one of more of the courses listed below!
You need a minimum screen resolution of about 700 pixels width to see our exercises. This is because they contain diagrams and tables which would not be viewable easily on a mobile phone or small laptop. Please use a larger tablet, notebook or desktop computer, or change your screen resolution settings.
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:
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:
Billionaires are more widely distributed geographically than successful companies?
Save this query as JoinByBillionaire, then close it and the database down.