Read our blogs, tips and tutorials
Try our exercises or test your skills
Watch our tutorial videos or shorts
Take a self-paced course
Read our recent newsletters
License our courseware
Book expert consultancy
Buy our publications
Get help in using our site
550 attributed reviews in the last 3 years
Refreshingly small course sizes
Outstandingly good courseware
Whizzy online classrooms
Wise Owl trainers only (no freelancers)
Almost no cancellations
We have genuine integrity
We invoice after training
Review 30+ years of Wise Owl
View our top 100 clients
Search our website
We also send out useful tips in a monthly email newsletter ...
Software ==> | SQL (203 exercises) |
Topic ==> | Parameters and return values (17 exercises) |
Level ==> | Harder than average |
Subject ==> | SQL training |
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.
First (if you haven't already done so) run the script shown above to generate the Doctor Who training database.
The aim of this exercise is to create a stored procedure called spGoodAndBad which shows the number of Doctor Who's companions and enemies for a given series number. For example, you could run this SQL:
-- choose series number for which to display info
DECLARE @SeriesNumber int = 1
-- variables to hold answers
DECLARE @NumEnemies int
DECLARE @NumCompanions int
EXEC spGoodAndBad @SeriesNumber, @NumEnemies output, @NumCompanions output
-- show the results
SELECT
@SeriesNumber AS 'Series number',
@NumEnemies AS 'Number of enemies',
@NumCompanions AS 'Number of companions'
This should give the following output:
For series 1, the Doctor met 8 distinct enemies and had 3 distinct companions.
Now all that you have to do is to write the stored procedure with one input and two output parameters!
The answers uses SELECT COUNT(DISTINCT EnemyId) and SELECT COUNT(DISTINCT CompanionID), although there may well be other ways to skin this proecedural cat.
After testing your procedure with different series numbers, optionally save it as Good and bad.sql, then close it down.
You can find other training resources for the subject of this exercise here:
Kingsmoor House
Railway Street
GLOSSOP
SK13 2AA
Landmark Offices
99 Bishopsgate
LONDON
EC2M 3XD
Holiday Inn
25 Aytoun Street
MANCHESTER
M1 3AE
© Wise Owl Business Solutions Ltd 2024. All Rights Reserved.