mysql>
mysql> CREATE TABLE Topic(
-> TopicID SMALLINT NOT NULL AUTO_INCREMENT PRIMARY KEY,
-> Name VARCHAR(50) NOT NULL,
-> InStock SMALLINT UNSIGNED NOT NULL,
-> OnOrder SMALLINT UNSIGNED NOT NULL,
-> Reserved SMALLINT UNSIGNED NOT NULL,
-> Department ENUM('Classical', 'Popular') NOT NULL,
-> Category VARCHAR(20) NOT NULL,
-> RowUpdate TIMESTAMP NOT NULL
-> );
Query OK, 0 rows affected (0.02 sec)
mysql>
mysql>
mysql> INSERT INTO Topic (Name, InStock, OnOrder, Reserved, Department, Category) VALUES
-> ('Java', 10, 5, 3, 'Popular', 'Rock'),
-> ('JavaScript', 10, 5, 3, 'Classical', 'Opera'),
-> ('C Sharp', 17, 4, 1, 'Popular', 'Jazz'),
-> ('C', 9, 4, 2, 'Classical', 'Dance'),
-> ('C++', 24, 2, 5, 'Classical', 'General'),
-> ('Perl', 16, 6, 8, 'Classical', 'Vocal'),
-> ('Python', 2, 25, 6, 'Popular', 'Blues'),
-> ('Php', 32, 3, 10, 'Popular', 'Jazz'),
-> ('ASP.net', 12, 15, 13, 'Popular', 'Country'),
-> ('VB.net', 5, 20, 10, 'Popular', 'New Age'),
-> ('VC.net', 24, 11, 14, 'Popular', 'New Age'),
-> ('UML', 42, 17, 17, 'Classical', 'General'),
-> ('www.java2s.com',25, 44, 28, 'Classical', 'Dance'),
-> ('Oracle', 32, 15, 12, 'Classical', 'General'),
-> ('Pl/SQL', 20, 10, 5, 'Classical', 'Opera'),
-> ('Sql Server', 23, 12, 8, 'Classical', 'General');
Query OK, 16 rows affected (0.00 sec)
Records: 16 Duplicates: 0 Warnings: 0
mysql>
mysql> select * from Topic;
+---------+----------------+---------+---------+----------+------------+----------+---------------------+
| TopicID | Name | InStock | OnOrder | Reserved | Department | Category | RowUpdate |
+---------+----------------+---------+---------+----------+------------+----------+---------------------+
| 1 | Java | 10 | 5 | 3 | Popular | Rock | 2007-07-23 19:09:45 |
| 2 | JavaScript | 10 | 5 | 3 | Classical | Opera | 2007-07-23 19:09:45 |
| 3 | C Sharp | 17 | 4 | 1 | Popular | Jazz | 2007-07-23 19:09:45 |
| 4 | C | 9 | 4 | 2 | Classical | Dance | 2007-07-23 19:09:45 |
| 5 | C++ | 24 | 2 | 5 | Classical | General | 2007-07-23 19:09:45 |
| 6 | Perl | 16 | 6 | 8 | Classical | Vocal | 2007-07-23 19:09:45 |
| 7 | Python | 2 | 25 | 6 | Popular | Blues | 2007-07-23 19:09:45 |
| 8 | Php | 32 | 3 | 10 | Popular | Jazz | 2007-07-23 19:09:45 |
| 9 | ASP.net | 12 | 15 | 13 | Popular | Country | 2007-07-23 19:09:45 |
| 10 | VB.net | 5 | 20 | 10 | Popular | New Age | 2007-07-23 19:09:45 |
| 11 | VC.net | 24 | 11 | 14 | Popular | New Age | 2007-07-23 19:09:45 |
| 12 | UML | 42 | 17 | 17 | Classical | General | 2007-07-23 19:09:45 |
| 13 | www.java2s.com | 25 | 44 | 28 | Classical | Dance | 2007-07-23 19:09:45 |
| 14 | Oracle | 32 | 15 | 12 | Classical | General | 2007-07-23 19:09:45 |
| 15 | Pl/SQL | 20 | 10 | 5 | Classical | Opera | 2007-07-23 19:09:45 |
| 16 | Sql Server | 23 | 12 | 8 | Classical | General | 2007-07-23 19:09:45 |
+---------+----------------+---------+---------+----------+------------+----------+---------------------+
16 rows in set (0.00 sec)
mysql>
mysql>
mysql> SELECT Name, Department, Category
-> FROM Topic
-> WHERE Category is NULL
-> ORDER BY Name;
Empty set (0.00 sec)
mysql>
mysql>
mysql>
mysql> SELECT Name, Department, Category
-> FROM Topic
-> WHERE Category = NULL
-> ORDER BY Name;
Empty set (0.00 sec)
mysql>
mysql>
mysql> drop table Topic;
Query OK, 0 rows affected (0.00 sec)
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