From 4f6716174fa70db2a48635580617d042b8163ae2 Mon Sep 17 00:00:00 2001
From: Sorrel Harriet <sharr003@igor.gold.ac.uk>
Date: Sun, 9 Oct 2016 07:47:21 +0100
Subject: [PATCH] adding column alias example

---
 lab-2/music-store-app/sql/practice_queries.sql | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/lab-2/music-store-app/sql/practice_queries.sql b/lab-2/music-store-app/sql/practice_queries.sql
index 1c05ab5..5538442 100644
--- a/lab-2/music-store-app/sql/practice_queries.sql
+++ b/lab-2/music-store-app/sql/practice_queries.sql
@@ -15,6 +15,10 @@ UPDATE Album SET price=21.99 WHERE name='Soul Rebel';
 /* Delete artists with first_name Madonna (Yay!) */
 DELETE FROM Artist WHERE first_name='Madonna';
 
+/* Example use of ORDER BY key-word */
+SELECT title, year, price FROM Album 
+ORDER BY year ASC, price DESC;
+
 /* Example simple table join.
 Gets title, price and year of albums
 where Artist last name is 'Marley'
@@ -38,8 +42,10 @@ WHERE g.name='Pop';
 
 /* Example multi table join 
 Gets album title, genre and name
-of first track on every album */
-SELECT a.title, g.name, t.name FROM Album a 
+of first track on every album.
+Uses both column and table aliases 
+to make result-set more readable */
+SELECT a.title AS album, g.name AS genre, t.name AS track FROM Album a 
 INNER JOIN Genre g 
 	ON a.genre_id=g.id 
 INNER JOIN Track t 
-- 
GitLab