SQL - サブクエリ(非相関サブクエリ)

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9章(サブクエリ),　9.7(練習問題)9-1を解いてみる。

9-1.

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 3
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 (0.06 sec)

mysql> select account_id,product_cd,cust_id,avail_balance
    -> from account
    -> where product_cd in (select product_cd
    -> from product
    -> where product.product_type_cd = 'LOAN');
+------------+------------+---------+---------------+
| account_id | product_cd | cust_id | avail_balance |
+------------+------------+---------+---------------+
|         25 | BUS        |      10 |          0.00 |
|         27 | BUS        |      11 |       9345.55 |
|         29 | SBL        |      13 |      50000.00 |
+------------+------------+---------+---------------+
3 rows in set (0.29 sec)

mysql> quit;
Bye
$