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| Software ==> | Access (66 exercises) |
| Topic ==> | Joins (4 exercises) |
| Level ==> | Average difficulty |
| Subject ==> | Access training |
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.
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.
Kingsmoor House
Railway Street
GLOSSOP
SK13 2AA
Landmark Offices
99 Bishopsgate
LONDON
EC2M 3XD
Holiday Inn
25 Aytoun Street
MANCHESTER
M1 3AE
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