SQL | Dynamic SQL exercise | Use dynamic SQL to create a procedure with varying sort order

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 ==> Dynamic SQL  (4 exercises)
Level ==> Average difficulty
Classroom ==> Fast-track SQL  /  Advanced SQL
Online ==> 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).

You need a minimum screen resolution of about 700 pixels width to see our exercises. This is because they contain diagrams and tables which would not be viewable easily on a mobile phone or small laptop. Please use a larger tablet, notebook or desktop computer, or change your screen resolution settings.

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

GO

-- 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.
This page has 0 threads Add post