Exercise: Create a view combining tables, and use this in another query

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Category ==> SQL  (156 exercises)
Topic ==> Views  (5 exercises)
Level ==> Average difficulty
Course ==> Introduction to SQL
Before you can do this exercise, you'll need to download and unzip this file (if you have any problems doing this, click here for help). Once you've done this:
  1. Go into SQL Server Management Studio;
  2. Open the SQL file you've just unzipped (you can press CTRL + O to do this); then
  3. 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).

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Write the script to generate a view called vwEverything (based on the tblCategory, tblEvent, tblCountry and tblContinent tables) to show this data:

View results

The first few of the 459 events returned, in no particular order.

To do this you should write a query which begins CREATE VIEW vwEverything AS followed by a SELECT statement.

Now write a query which selects data from this view to show the number of events by category within Africa:

Events for Africa

The results of running this separate SQL statement.

 

You should now be impressed with how easy this was to do, because you'd given your columns such sensible aliases in the view!

Save this query as Boom with a view, and close it down (reflecting that it isn't always easy to come up with good names for queries).

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