Java™ Application Development on Linux - Dator

14.5 Oracle, PostgreSQL, MySQL31714.5.1 MySQLMySQL is a very fast but somewhat limited SQL database system. It is wildlypopular mainly because it is simple, fast, and Free. It is everything that youwould need to back a dynamic Web site. As of this writing, the stable productionversion of MySQL is 4.0.16, but most Linux distributions are still shippingsomething from the 3.23.x series.At this point, MySQL lacks some key features:• Stored procedures• Sub-SELECTs• TriggersVersion 4.0.x does support some long-awaited features (if you use theInnoDB table type instead of the default MyISAM tables), such as row-levellocking, foreign keys, and transactions. But InnoDB tables are not directlyavailable in the 3.23.x versions still shipping with many distributions.MySQL is an excellent choice for designs that do not require stored procedures,triggers, or transactions. It is widely used as a back end for dynamic Websites—applications with many reading users and few writing users.For more information on MySQL, see Core MySQL by Leon Atkinson(ISBN 0-13-066190-2).14.5.2 PostgreSQLPostgreSQL is a surprisingly complete and full-featured database offering.Not only does it fully support stored procedures, triggers, views, foreignkeys, and transactions, but it also implements an innovative “record versioning”system for multiuser integrity. Unlike many other databases, readers may continueto read consistent data during writing activity (nonblocking revisions), andbackups may be taken while the database is still available for queries. This is aserious database.This database has excellent public documentation. Take a look at thePostgreSQL Documentation. 1 Another useful book is PostgreSQL by Korry andSusan Douglas (ISBN 0-7357-1257-3).1. http://www.postgresql.org/docs/current/static/index.html