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SQL | Calculations exercise | Use a CASE statement to divide countries into groups
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- Go into SQL Server Management Studio;
- Open the SQL file you've just unzipped (you can press CTRL + O to do this); then
- Execute this script.
This will generate the database that you'll need to use in order to do this exercise (note that the database and script are only to be used for exercises published on this website, and may not be reused or distributed in any form without the prior written permission of Wise Owl).
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Write a query to divide countries into these groups:
|Continent id||Belongs to||Actual continent (for interest)|
|1 or 3||Eurasia||Europe or Asia|
|5 or 6||Americas||North and South America|
|2 or 4||Somewhere hot||Africa and Australasia|
Your query (based only on the tblCountry table) should show the following results:
The first few countries, sorted in reverse alphabetical order by your new column.
Save this query as Continental Drift, then close it down.
Does anyone have the script for Continental Drift?
-- This should work---
WHEN [ContinentID] in ('1','3') then 'Eurasia'
When [ContinentID] in ('5','6') then 'Americas'
When [ContinentID] in ('2','4') then 'Somewhere hot'
When [ContinentID] = 7 then 'Somewhere cold'
ELSE 'Somewhere else' END as 'CountryLocation'
order by CountryLocation desc