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Software ==>	SQL (203 exercises)
Topic ==>	Calculations (18 exercises)
Level ==>	Harder than average
Subject ==>	SQL training

Use a variety of text functions in SQL queries to manipulate names and addresses of a list of venues.

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 want to download the SQL Server database that this yields:

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 (remember to refresh your list of databases to see it!). Note that any files provided 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.

If you don't have a copy of the Music_01 database, follow the instructions at the following link to create it: www.wiseowl.co.uk/sql/exercises/standard/using-sql-server/5257/

Write a query to select the Venue and Address columns from the Venue table.

Add a calculated column using the LEFT and CHARINDEX functions which returns everything up to and including the first comma in the Address.

A list of venues and addresses returned by a SQL Server query.

The first few results you should see.

Modify the column to remove trailing comma. You'll need to be careful of addresses which don't contain a comma. In these cases, return the full address.

A string extracted from a text column in SQL Server.

If the address doesn't contain a comma, return the full address.

You may find it helpful to know that the CHARINDEX function returns 0 if it doesn't find the string you're searching for.

Add a new query which returns the Venue and Other_names columns from the Venue table.

A list of venues created by a SQL query.

Venues may have multiple, one or no former names.

When a venue has multiple former names, each one is separated with a semi-colon character. Add a calculated column to work out the number of former names a venue has. One approach to doing this involves comparing the length of the Other_names column with a version of the same column where the semi-colons have been removed.