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Software ==>	SQL (129 exercises)
Topic ==>	Calculations (7 exercises)
Level ==>	Average difficulty
Subject ==>	SQL training

Write a CASE WHEN expression to assign countries to different groups

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.

Before you can do this exercise, you'll need to download and unzip this file. Once you've done this:

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).

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
7	Somewhere cold	Antarctica
Otherwise	Somewhere else	International

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.

You can unzip this file to see the answers to this exercise, although please remember this is for your personal use only.

You can find other training resources for the subject of this exercise here:

This page has 3 threads

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From:	Yash2211
When:	17 Sep 23 at 12:41

Reply to Yash2211

select Countryname,
case
when continentid in (1,3) then 'Eurasia'
when continentid in (5,6) then 'Americas'
when continentid in (2,4) then 'somewhere hot'
when continentid in (7) then 'somewhere cold'
else 'somewhere else'
end as 'Countrylocation'
from tblCountry
order by countryLocation desc

From:	Aravindh_sql
When:	26 May 22 at 18:27

Reply to Aravindh_sql

SELECT CountryName ,
CASE
WHEN (ContinentID = 1 or ContinentID = 3 ) THEN 'Eurasia'

WHEN (ContinentID = 5 or ContinentID = 6 ) THEN 'Americas'
WHEN (ContinentID = 2 or ContinentID = 4 ) THEN 'Somewhere hot'
WHEN (ContinentID = 7 ) THEN 'Somewhere Cold'
ELSE 'Somewhere else'

END AS CountryLocation
FROM tblcountry
ORDER BY CountryLocation DESC

From:	esottilaro
When:	25 Sep 19 at 15:48

Reply to esottilaro

Does anyone have the script for Continental Drift?

From:	rasim.setia
When:	06 Oct 19 at 19:19

Reply to rasim.setia

-- This should work---

SELECT [CountryName]
,CASE
   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'
FROM [WorldEvents].[dbo].[tblCountry]
order by CountryLocation desc

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Write a CASE WHEN expression to assign countries to different groups

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