Exercise: Turning null continent ids into values

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Category ==> SQL  (115 exercises)
Topic ==> Calculations  (4 exercises)
Level ==> Relatively easy
Course ==> Introduction to SQL
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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:

SQL exercise - Calculations (image 1)

Listed in reverse alphabetical order, the World appears first

Save this query as Denullification, and close it down.

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