SQL - 結合(3段の外部結合)

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)10-3を解いてみる。

10-3.

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 12
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 a.account_id,a.product_cd,i.fname,i.lname,b.name
    -> from account a left outer join individual i
    -> on a.cust_id = i.cust_id left outer join business b
    -> on a.cust_id = b.cust_id;
+------------+------------+----------+---------+------------------------+
| account_id | product_cd | fname    | lname   | name                   |
+------------+------------+----------+---------+------------------------+
|          1 | CHK        | James    | Hadley  | NULL                   |
|          2 | SAV        | James    | Hadley  | NULL                   |
|          3 | CD         | James    | Hadley  | NULL                   |
|          4 | CHK        | Susan    | Tingley | NULL                   |
|          5 | SAV        | Susan    | Tingley | NULL                   |
|          7 | CHK        | Frank    | Tucker  | NULL                   |
|          8 | MM         | Frank    | Tucker  | NULL                   |
|         10 | CHK        | John     | Hayward | NULL                   |
|         11 | SAV        | John     | Hayward | NULL                   |
|         12 | MM         | John     | Hayward | NULL                   |
|         13 | CHK        | Charles  | Frasier | NULL                   |
|         14 | CHK        | John     | Spencer | NULL                   |
|         15 | CD         | John     | Spencer | NULL                   |
|         17 | CD         | Margaret | Young   | NULL                   |
|         18 | CHK        | Louis    | Blake   | NULL                   |
|         19 | SAV        | Louis    | Blake   | NULL                   |
|         21 | CHK        | Richard  | Farley  | NULL                   |
|         22 | MM         | Richard  | Farley  | NULL                   |
|         23 | CD         | Richard  | Farley  | NULL                   |
|         24 | CHK        | NULL     | NULL    | Chilton Engineering    |
|         25 | BUS        | NULL     | NULL    | Chilton Engineering    |
|         27 | BUS        | NULL     | NULL    | Northeast Cooling Inc. |
|         28 | CHK        | NULL     | NULL    | Superior Auto Body     |
|         29 | SBL        | NULL     | NULL    | AAA Insurance Inc.     |
+------------+------------+----------+---------+------------------------+
24 rows in set (0.47 sec)

mysql> quit;
Bye
$