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PHP and MySQL Programming/Creating a Table

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<PHP and MySQL Programming

Before creating a table, please read the previous section onCreating a Database.

A Table resides inside a database. Tables contain rows, which are made up of a collection of common fields or columns. Here is a sample output for a SELECT * query:

mysql> SELECT * FROM `books`;+------------+--------------+------------------------------+------+|ISBN Invalid ISBN | Author       | Title                        | Year |+------------+--------------+------------------------------+------+| 1234567890 | Poisson, R.W | Programming PHP and MySQL    | 2006 || 5946253158 | Wilson, M    | Java Secrets                 | 2005 || 8529637410 | Moritz, R    | C from Beginners to Advanced | 2001 |+------------+--------------+------------------------------+------+

As you can see, We have rows (horizontal collection of fields), as well as columns (the vertical attributes and values).

Creating a Table

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The SQL code for creating a table is as follows:

mysql> CREATE TABLE `table_name` (       `field1` type NOT NULL|NULL default 'default_value',       `field2` type NOT NULL|NULL default 'default_value',       ...       );

Example

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Here is an example of creating a table called `books`:

mysql> CREATE TABLE `books` (       `ISBN` varchar(35) NOT NULL default '',       `Author` varchar(50) NOT NULL default '',       `Title` varchar(255) NOT NULL default '',       `Year` int(11) NOT NULL default '2000'       );

Getting Information about Tables

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To get a list of tables:

mysql> SHOW TABLES;

Which produces the following output:

+-------------------+| Tables_in_library |+-------------------+| books             |+-------------------+1 row in set (0.19 sec)

To show the CREATE query used to create the table:

mysql> SHOW CREATE TABLE `books`;

Which produces the following output:

+-------+--------------------------------------------+ | Table | Create Table +-------+--------------------------------------------+| books | CREATE TABLE `books` (  `ISBN` varchar(35) NOT NULL default '',  `Author` varchar(50) NOT NULL default '',  `Title` varchar(255) NOT NULL default '',  `Year` int(11) NOT NULL default '2000') TYPE=MyISAM |+-------+--------------------------------------------+1 row in set (0.05 sec)

And then to show the same information, in a tabulated format:

mysql> DESCRIBE `books`;

Which produces the following output:

+--------+--------------+------+-----+---------+-------+| Field  | Type         | Null | Key | Default | Extra |+--------+--------------+------+-----+---------+-------+|ISBN Invalid ISBN | varchar(35)  |      |     |         |       || Author | varchar(50)  |      |     |         |       || Title  | varchar(255) |      |     |         |       || Year   | int(11)      |      |     | 2000    |       |+--------+--------------+------+-----+---------+-------+4 rows in set (0.18 sec)


Creating a DatabasePHP and MySQL Programming
Creating a Table
Basic Queries
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