Exercise: Link training tables with 2 parameters

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 ==> Parameters and return values  (8 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.  This exercise uses the following tables:

SQL exercise - Parameters and return values (image 1)

The five tables you need to join together!

Create a stored procedure called spListDelegates which displays, for a given company name and course name extract, the people who are attending courses.  If you leave either of the two parameters out, your stored procedure should show all rows for that parameter.

Here are some ways in which you could test your stored procedure:

Stored procedure with parameters

These calls to your procedure should return 1 (if you're looking for an exact company name match), 20 and 124 delegates respectively.

Optionally, save the query to generate your stored procedure as Delegates for course and company.sql, then close it down.

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