Exercise: Show end date for given course

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 ==> Scalar functions  (6 exercises)
Level ==> Relatively easy
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 refers to columns from the following two tables:

SQL exercise - Avoiding scalar functions (image 1)

Each course product can have lots of instances of the course scheduled

Create a function called fnEndDate which takes in:

  • The start date of a course; and
  • The number of days it lasts

Your function should then return the end date of the course.

Use the DateAdd function to work out the end date: the syntax is DateAdd ( day, Number of days to add, Start date) .

Incorporate your function within a query to show the start and end dates of all courses which start and end within January 2010:

SQL exercise - Avoiding scalar functions (image 2)

You should see six courses

Optionally, save this query as Course end date function.sql, then close it down.

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