WISE OWL EXERCISES
SQL EXERCISES
SQL EXERCISES
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SQL | Archived exercise | Turning null continent ids into values
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 the relevant Wise Owl course (sadly, only in the UK for now).
| Software ==> | SQL (192 exercises) |
| Version ==> | Any version of SQL Server |
| Topic ==> | Archived (70 exercises) |
| Level ==> | Relatively easy |
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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 a list of the countries in the tblCountry table in reverse alphabetical order. Where a country has no continent id, replace this with 0:
Listed in reverse alphabetical order, the World appears first
Save this query as Denullification, and close it down.