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Software ==>	Postgres SQL (35 exercises)
Topic ==>	More exotic joins (2 exercises)
Level ==>	Average difficulty
Subject ==>	PostgreSQL training

Show a list of music artists who don't have any associated concert tours.

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.

If you don't have a copy of the music_01 database, first follow the instructions at the following link to create it: https://www.wiseowl.co.uk/postgres/exercises/postgres-sql/using-postgres/5350/

Write a query to show the following columns from the artist and tour tables, using an inner join to begin with.

Artists and tours

Sort the results in ascending order of Artist and Tour_name.

Change the type of join so that your query returns every row from the Artist table. You should end up with more results than previously.

Add a WHERE clause to return only artists who have no associated tours.

Artists with no tours

We seem to have a bird-themed list.

Add a calculated column which shows a message like the one shown below for artists with no tours:

Artists without tours with descriptions

Delivering on-site training courses is almost like being on tour!

Save the script as Birds of prey.sql and then close it.

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