WISE OWL EXERCISES
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SQL | Scalar functions exercise | Function to classify an event status
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.
You can learn how to do this exercise if you attend the course listed below!
- 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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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:
WHEN @Para1 IN (SELECT TOP 1 EVENTNAME FROM TableName ORDER BY Column) THEN 'Oldest'
--Repeat until happy
Optionally save as Winner winner chicken dinner.sql and close it down.