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Software ==>	SQL (203 exercises)
Topic ==>	Scalar functions (9 exercises)
Level ==>	Harder than average
Subject ==>	SQL training

Use a CASE statement to classify each event according to whether it is the top of its class or not

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).

Time to test the events and see who receives a podium finish! Create a function to test each event and classify it as the oldest, newest, alphabetically first, alphabetically last or (in all other cases) as a loser:

Donald Trump's election is the newest event in the database, for example, and hence a winner.

The best way to do this is create a CASE statement that tests if the current parameter is IN the output of a select statement holding the winners:

CASE

WHEN @Para1 IN (SELECT TOP 1 EVENTNAME FROM TableName ORDER BY Column) THEN 'Oldest'

--Repeat until happy

ELSE 'LOSER'

END

Optionally save as Winner winner chicken dinner.sql and 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:

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