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This page has 1 thread | Add post

Exercises

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Software ==>	SQL (203 exercises)
Topic ==>	Basic joins (12 exercises)
Level ==>	Relatively easy
Subject ==>	SQL training

Use an inner join to link two tables together in a query

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 .

If you haven't already done so, run the script in the folder above to generate the Doctor Who database.

Right-click in a new query and use the designer to create a query linking these two tables:

Two tables

Each episode is linked to the person who wrote it.

Add columns and filters to your query so that it shows who wrote the "special" episodes (there should be 13 listed out, of which the first few in alphabetical order are shown below):

First few episodes

The first few episodes containing the word special in the title.

For the filter, use the criteria LIKE '%special%'.

Now tidy up the generated query so that it looks more like proper SQL! Here's a suggestion:

-- the query, tidied up

SELECT

tblAuthor.AuthorName,

tblEpisode.Title,

tblEpisode.EpisodeType

FROM

tblAuthor

INNER JOIN tblEpisode ON

tblAuthor.AuthorId = tblEpisode.AuthorId

WHERE

tblEpisode.EpisodeType LIKE '%special%'

ORDER BY

tblEpisode.Title

Save this query as No joins necessary, 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 1 thread

From:	Orin
When:	11 Feb 24 at 12:23

Hello, I can't seem to find out how to set a like filter in the Query designer. If I enter this (with or without ' ') :

I end up with WHERE (tblEpisode.EpisodeType = N'%special%')

I know how to correct it but I may have missed how to do it through this editor.

From:	Andy B
When:	12 Feb 24 at 08:25

I reverse-engineered it! Select your query which works, right-click on it and choose this option:

You'll see this is what SSMS does:

Good question though ....

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