SQL - 結合(右外部結合(right outer join))

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)10-2を解いてみる。

10-2.

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 8
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> desc product;
+-----------------+-------------+------+-----+---------+-------+
| Field           | Type        | Null | Key | Default | Extra |
+-----------------+-------------+------+-----+---------+-------+
| product_cd      | varchar(10) | NO   | PRI | NULL    |       |
| name            | varchar(50) | NO   |     | NULL    |       |
| product_type_cd | varchar(10) | NO   | MUL | NULL    |       |
| date_offered    | date        | YES  |     | NULL    |       |
| date_retired    | date        | YES  |     | NULL    |       |
+-----------------+-------------+------+-----+---------+-------+
5 rows in set (0.00 sec)

mysql> desc account;
+--------------------+----------------------------------+------+-----+---------+----------------+
| Field              | Type                             | Null | Key | Default | Extra          |
+--------------------+----------------------------------+------+-----+---------+----------------+
| account_id         | int(10) unsigned                 | NO   | PRI | NULL    | auto_increment |
| product_cd         | varchar(10)                      | NO   | MUL | NULL    |                |
| cust_id            | int(10) unsigned                 | NO   | MUL | NULL    |                |
| open_date          | date                             | NO   |     | NULL    |                |
| close_date         | date                             | YES  |     | NULL    |                |
| last_activity_date | date                             | YES  |     | NULL    |                |
| status             | enum('ACTIVE','CLOSED','FROZEN') | YES  |     | NULL    |                |
| open_branch_id     | smallint(5) unsigned             | YES  | MUL | NULL    |                |
| open_emp_id        | smallint(5) unsigned             | YES  | MUL | NULL    |                |
| avail_balance      | float(10,2)                      | YES  |     | NULL    |                |
| pending_balance    | float(10,2)                      | YES  |     | NULL    |                |
+--------------------+----------------------------------+------+-----+---------+----------------+
11 rows in set (0.00 sec)

mysql> select p.product_cd,a.account_id
    -> from account a right outer join product p
    -> on a.product_cd = p.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 (0.00 sec)

mysql> quit;
Bye
$