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Software ==>	SQL (129 exercises)
Topic ==>	Dynamic SQL (4 exercises)
Level ==>	Average difficulty
Subject ==>	SQL training

Write a procedure using EXEC which varies the sort column according to the parameter value passed

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.

Before you can do this exercise, you'll need to download and unzip this file.

First (if you haven't already done so) run the script shown above to generate the Doctor Who training database.

Create a procedure called spEpisodesSorted which takes two parameters:

Parameter	What it does	Default value
@SortColumn	The name of the column to sort by	EpisodeId
@SortOrder	The order to sort by (ASC or DESC)	ASC

Declare and build up a string variable called @sql which contains a SELECT command based on the value of these two parameters, and execute it like this:

-- run command contained in variable

EXEC(@sql)

You should now be able to list the Doctor Who episodes in different orders! For example:

-- show episodes in default order

spEpisodesSorted

-- show episodes in reverse title order

spEpisodesSorted 'Title', 'DESC'

When you've got this working, optionally save the query as Allsorts.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.

You can find other training resources for the subject of this exercise here:

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EXERCISE TOPIC

SQL EXERCISES

SQL EXERCISES

Write a procedure using EXEC which varies the sort column according to the parameter value passed

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