This page has 0 threads | Add post

Exercises

Finding our exercises useful? Please consider helping us to share more!

Software ==>	SQL (129 exercises)
Topic ==>	Parameters and return values (11 exercises)
Level ==>	Harder than average
Subject ==>	SQL training

Return from a stored proecure the name of the country with the most events and how many events there were.

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. Once you've done this:

Go into SQL Server Management Studio;
Open the SQL file you've just unzipped (you can press CTRL + O to do this); then
Execute this script.

This will generate the database that you'll need to use in order to do this exercise (note that the database and script are only to be used for exercises published on this website, and may not be reused or distributed in any form without the prior written permission of Wise Owl).

First write a stored procedure to show which country has the most events:

Your query should show these results - we now want to capture these two bits of information, and return them to the calling query.

Add two output parameters to your procedure:

Parameter	What it should take
@TopCountry	The country name
@EventCount	The number of events for it

The parameters must have a default value, and must include the word OUTPUT.

Amend your procedure to capture the country name and number of events in these variables, within your SELECT clause:

SELECT TOP 1

--Values go into parameters just like variables

@TopCountry = CountryName

,@EventCount= COUNT(E.CountryID)

FROM ...

Open a new window to execute the procedure. Create two variables to store the values held in the output parameters.

Using output parameters will give you headaches.

The tricky part is setting the parameters equal to the variables: remember to specify OUTPUT!

Select the two variables to check the information has been successfully output.

Optionally save this as Most Eventful Country.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:

This page has 0 threads

Add a new post

Head office

Kingsmoor House

Railway Street

GLOSSOP

SK13 2AA

London

Landmark Offices

99 Bishopsgate

LONDON

EC2M 3XD

Manchester

Holiday Inn

25 Aytoun Street

MANCHESTER

M1 3AE

Site map

Terms & Conditions

Book any course as classroom, onsite or online training, or as one-to-one consultancy

Free resources

Paid services

Getting help

Where we are

Where you are

Online

Transparent reviews

Delivery of courses

Nicer to work with

Reliable and established

Our training courses

C#

Excel

MySQL

Power Apps

Power Automate

Power BI and DAX

Python

Report Builder

SQL

SQL Server

VBA Macros

Other training resources

Blogs

Exercises

YouTube tutorials

YouTube shorts

Test your skills

Consultancy

Courseware

Self-paced courses

Newsletters

Publications

Our training venues

London

Manchester

Across the UK

At your site

Online

Why we are different

Hundreds of published reviews

Small class sizes

Outstanding courseware

Online classroom

(Almost) no cancellations

Wise Owl trainers only

Genuine integrity

Invoices after training

30+ years of Wise Owl

Our top 100 clients

EXERCISE TOPIC

SQL EXERCISES

SQL EXERCISES

Return from a stored proecure the name of the country with the most events and how many events there were.

Head office

London

Manchester