This page has 1 thread | Add post

Exercises

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

Software ==>	SQL (129 exercises)
Topic ==>	Creating tables (5 exercises)
Level ==>	Average difficulty
Subject ==>	SQL training

Has mistake must fix spelling of millenium!!!!

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).

The aim of this exercise is to explicitly create a table, then insert the output from several select statements into it. The final table should list out the count of events for each country, continent and two millennia.

The last millennium is here defined as containing any event before '2000-01-01'.

Start by using CREATE to construct the table with two columns (one to hold the name of the the category and the other to hold the COUNT of films):

Feel free to use more imaginative column names.

Now use INSERT INTO above SELECT to put data for the last millenium into the newly created table.

Repeat this for each row of data to separately add a statistic for:

The current millennium;
Each continent (using grouping);
Each country (using grouping).

Unless using a UNION there will need to use a separate INSERT for each select. Remember if using UNION there needs to be the same number of columns in each SELECT statement.

Optionally save this as Going Places.sql and then close it down.

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

This page has 1 thread

Add a new post

From:	ermanakkus
When:	05 Jun 20 at 00:01

Reply to ermanakkus

Can someone upload the solution please? :(

From:	SMax07
When:	22 Oct 20 at 15:17

Reply to SMax07

Hi, I'm using this opportunity to submit my answer to this exercise. As said, consider this to be hint when you run out of solutions, as there is no file from Wise Owl. I'm still in the learning process of SQL, but I think it's good to have at least an answer to help someone who would have trouble doing the exercise while traiing honestly. I do not pretend this to be perfect or fully efficient though, but at least I think it does put you in right direction.

-- In case it is necessary to redirect the database link

USE WorldEvents

-- Useful if you want to run the query at will with the same script

BEGIN TRY
   DROP TABLE Summary_Data
END TRY
BEGIN CATCH
END CATCH

-- varchar(250) may be overkill, I put NOT NULL by habit, not forcibly necessary here

CREATE TABLE Summary_Data (SummaryItems varchar (250) NOT NULL, CountEvents smallint NOT NULL)

INSERT INTO Summary_Data (SummaryItems, CountEvents)
VALUES ('Last Millenium',(SELECT COUNT(*) FROM tblEvent WHERE YEAR(EventDate)<2000))

INSERT INTO Summary_Data (SummaryItems, CountEvents)
VALUES ('New Millenium',(SELECT COUNT(*)FROM tblEvent WHERE YEAR(EventDate)>1999))

INSERT INTO Summary_Data (SummaryItems, CountEvents)
SELECT
   co.ContinentName , COUNT(DISTINCT(e.EventID))
   FROM tblEvent AS e
   INNER JOIN tblCountry as cn ON e.CountryID = cn.CountryID
   INNER JOIN tblContinent AS co ON cn.ContinentID = co.ContinentID
   GROUP BY co.ContinentName

INSERT INTO Summary_Data (SummaryItems, CountEvents)
SELECT
   cn.CountryName , COUNT(DISTINCT(e.EventID))
   FROM tblEvent AS e
   INNER JOIN tblCountry as cn ON e.CountryID = cn.CountryID
   GROUP BY cn.CountryName

SELECT * FROM Summary_Data

Good luck

From:	Rachel Owl
When:	08 Jun 20 at 09:07

Reply to Rachel Owl

Sorry, we seem to have mislaid the solution to this one. It does give more of an incentive to solve the exercise though ...

Add a new post

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

Has mistake must fix spelling of millenium!!!!

Head office

London

Manchester