SQL | Table-valued functions exercise | Table function to summarise a continent for month

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 one of more of the courses listed below!

Software ==> SQL  (198 exercises)
Version ==> Any version of SQL Server
Topic ==> Table-valued functions  (6 exercises)
Level ==> Average difficulty
Courses ==> Fast-track SQL  /  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.

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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The aim of this exercise is to create a function that returns summary information about a given continent during a chosen month.  For example, you should be able to run this command:

SELECT * FROM dbo.fnContinentSummary('Europe','April')

Passing in Europe and April like this should give the following results:

Count aggregate within Inline function.

April unsurprisingly is an important month.

To do this, you will need to join the tblCategory, tblEvent, tblCountry and tblContinent tables together, and select COUNT(DISTINCT()) from each table.  To help you, here's what your function code should look like:

CREATE FUNCTION ChooseName

(@Para1 DataType, @Para2 DataType)

RETURNS Table

AS

RETURN

--Select statement that will form the table

Optionally save your query as Counting By Continents.sql 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.
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