(mysql.info) database-use

 
 3.3 Creating and Using a Database
 =================================

 
* creating-database            Creating and Selecting a Database
* creating-tables              Creating a Table
* loading-tables               Loading Data into a Table
* retrieving-data              Retrieving Information from a Table
 
 Once you know how to enter commands, you are ready to access a database.
 
 Suppose that you have several pets in your home (your menagerie) and
 you would like to keep track of various types of information about
 them. You can do so by creating tables to hold your data and loading
 them with the desired information. Then you can answer different sorts
 of questions about your animals by retrieving data from the tables.
 This section shows you how to:
 
    * Create a database
 
    * Create a table
 
    * Load data into the table
 
    * Retrieve data from the table in various ways
 
    * Use multiple tables
 
 The menagerie database is simple (deliberately), but it is not
 difficult to think of real-world situations in which a similar type of
 database might be used. For example, a database like this could be used
 by a farmer to keep track of livestock, or by a veterinarian to keep
 track of patient records. A menagerie distribution containing some of
 the queries and sample data used in the following sections can be
 obtained from the MySQL Web site.  It is available in both compressed
 `tar'
 (`http://www.mysql.com/Downloads/Contrib/Examples/menagerie.tar.gz')
 and Zip
 (`http://www.mysql.com/Downloads/Contrib/Examples/menagerie.zip')
 formats.
 
 Use the `SHOW' statement to find out what databases currently exist on
 the server:
 
      mysql> SHOW DATABASES;
      +----------+
      | Database |
      +----------+
      | mysql    |
      | test     |
      | tmp      |
      +----------+
 
 The list of databases is probably different on your machine, but the
 `mysql' and `test' databases are likely to be among them. The `mysql'
 database is required because it describes user access privileges. The
 `test' database is often provided as a workspace for users to try
 things out.
 
 Note that you may not see all databases if you do not have the `SHOW
 DATABASES' privilege. See  grant.
 
 If the `test' database exists, try to access it:
 
      mysql> USE test
      Database changed
 
 Note that `USE', like `QUIT', does not require a semicolon. (You can
 terminate such statements with a semicolon if you like; it does no
 harm.) The `USE' statement is special in another way, too: it must be
 given on a single line.
 
 You can use the `test' database (if you have access to it) for the
 examples that follow, but anything you create in that database can be
 removed by anyone else with access to it. For this reason, you should
 probably ask your MySQL administrator for permission to use a database
 of your own.  Suppose that you want to call yours `menagerie'.  The
 administrator needs to execute a command like this:
 
      mysql> GRANT ALL ON menagerie.* TO 'your_mysql_name'@'your_client_host';
 
 where `your_mysql_name' is the MySQL user name assigned to you and
 `your_client_host' is the host from which you connect to the server.

Info Catalog

(mysql.info) entering-queries

(mysql.info) tutorial

(mysql.info) getting-information

automatically generated byinfo2html

(mysql.info) database-use

Menu