Exercise: Function to get courses for given resource name

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.

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

Category ==> SQL  (115 exercises)
Topic ==> Table-valued functions  (6 exercises)
Level ==> Average difficulty
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).

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If you haven't already done so, run the stored procedure in the above folder to generate a database of training courses and delegates.

Create a multi-statement table-valued function (!) called fnCoursesForResources which - given a particular resource name - will return a table of courses which use that resource.  Here's how this should work:

SQL exercise - Table-valued functions (image 1)

You can call the function with different resource names, to get different results

You may find it helpful to declare an integer variable called @ResourceId, and set this to hold the ID of the resource corresponding to the name passed in as an argument.  You can then test to see if this equals null (which would mean the resource didn't exist).

Here are the first 3 of the 79 rows the function should return for a Projector:

SQL exercise - Table-valued functions (image 2)

This assumes you sort the data by course start date

Optionally, save this query as Courses for horses.sql, then close it down.

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