SQL - 結合(左外部結合(left outer join))

初めてのSQL
Alan Beaulieu (著)

開発環境

• OS: OS X Lion - Apple
• データベース言語: SQL
• リレーショナルデータベース: MySQL

『初めてのSQL』(Alan Beaulieu 著、株式会社クイープ 翻訳、オライリー・ジャパン、2006年、ISBN4-87311-281-8) の10章(結合),　10.4(練習問題)10-1を解いてみる。

10-1.

入出力結果(Terminal)

$ mysql -u lrngsql -p bank
Enter password: 
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 10
Server version: 5.5.24 MySQL Community Server (GPL)

Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> select p.product_cd,a.account_id
    -> from product p left outer join account a
    -> on p.product_cd = a.product_cd;
+------------+------------+
| product_cd | account_id |
+------------+------------+
| CD         |          3 |
| CD         |         15 |
| CD         |         17 |
| CD         |         23 |
| CHK        |          1 |
| CHK        |          4 |
| CHK        |          7 |
| CHK        |         10 |
| CHK        |         13 |
| CHK        |         14 |
| CHK        |         18 |
| CHK        |         21 |
| CHK        |         24 |
| CHK        |         28 |
| MM         |          8 |
| MM         |         12 |
| MM         |         22 |
| SAV        |          2 |
| SAV        |          5 |
| SAV        |         11 |
| SAV        |         19 |
| AUT        |       NULL |
| BUS        |         25 |
| BUS        |         27 |
| MRT        |       NULL |
| SBL        |         29 |
+------------+------------+
26 rows in set (0.02 sec)

mysql> quit;
Bye
$