PHP MySQL - Stilson.net

www.it-ebooks.infoCHAPTER 28 • MYSQL STORAGE ENGINES AND DATA TYPESViewing DatabasesIt’s often useful to retrieve a list of databases located on the server. To do so, execute the SHOW DATABASEScommand:mysql>SHOW DATABASES;+--------------------------------+| Database |+--------------------------------+| information_schema || book || corporate || mysql || test || wikidb |+--------------------------------+6 rows in set (0.57 sec)Keep in mind that your ability to view all the available databases on a given server is affected by userprivileges. See Chapter 29 for more information about this matter.Note that using the SHOW DATABASES command is the standard methodology prior to MySQL version5.0.0. Although the command is still available for versions 5.0.0 and greater, consider using thecommands provided to you by way of the INFORMATION_SCHEMA. See the later section titled “TheINFORMATION_SCHEMA” for more information about this new feature.Creating a DatabaseThere are two common ways to create a database. Perhaps the easiest is to create it using the CREATEDATABASE command from within the mysql client:mysql>CREATE DATABASE company;Query OK, 1 row affected (0.00 sec)You can also create a database via the mysqladmin client:%>mysqladmin -u root -p create companyEnter password:%>Common problems for failed database creation include insufficient or incorrect permissions, or anattempt to create a database that already exists.547