Exercise: Function to classify an event status

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The answer to the exercise will be included and explained if you attend the course listed below!

Category ==> SQL  (192 exercises)
Topic ==> Scalar functions  (6 exercises)
Level ==> Harder than average
Course ==> Advanced SQL
Before you can do this exercise, you'll need to download and unzip this file (if you have any problems doing this, click here for help). Once you've done this:
  1. Go into SQL Server Management Studio;
  2. Open the SQL file you've just unzipped (you can press CTRL + O to do this); then
  3. Execute this script.

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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:

Function using CASE to test outcome

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.

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