This page has 0 threads | Add post

Exercises

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

Software ==>	SQL (129 exercises)
Topic ==>	Variables (8 exercises)
Level ==>	Harder than average
Subject ==>	SQL training

Create a list variable to store all the events released in a specified year.

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).

Write a SQL statement which brings back the top 3 events in your year of birth, in event name order. You will need to use the YEAR function in the WHERE clause to do this, together with SELECT TOP 3 and an ORDER BY clause:

The events that you should return if you are ridiculously young enough to be born in 1992.

Running the SELECT statement will generate a number of rows, but variables can only hold one. What we'd really like to do is to join the events into a single string variable:

Much more compressed!

To do this, first create a VARCHAR variable (called @EventsInYear, say) to hold the event names.

Now amend your SQL statement so that it sets this variable to hold the concatenated event names. The syntax for getting this list to build can be tricky. Instead of simply putting variable = value, you need to set the variable equal to itself plus the value:

@Variable = @Variable + Column + ', '

This stops each new row from replacing the previous variable value, and instead adds text on to the last value (hence accumulating a list).

If the value of @Variable reads NULL when you show it at the end, try setting its initial value to a blank string.

Optionally save this query as Eventful Year.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

Create a list variable to store all the events released in a specified year.

Head office

London

Manchester