摘要：Oracle includes datatypes to handle all the types of rich Internet content such as relational data, object-relational data, XML, text, audio, video, image, and spatial. These datatypes appear as native types in the database. They can all be queried using SQL. A single SQL statement can include data beloging to any all of these datatypes. 阅读全文

摘要：Overview of High Availability Features Computing environments configured to provide nearly full-time availability are know as high availability systems. Such systems typically have redundant hardware and software that makes the system available despite failures. Well-designed high availability systems avoid having single points-of-failure. When failures occur, the fail over process moves processing performed by the failed component to the backup component. This process remasters systemwide 阅读全文

摘要：Overview of Scalability and Performance Features Oracle includes serveral software mechanisms to fulfill the following important requirements of an information management system: - Data concurrency of a multiuser system must be maximized. - Data must be read and modified in a consistent fashion. The data a user is viewing or changing is not changed(by other users) until the user is finished with the data. - High performance is required for maximum productivity from the many users of 阅读全文

摘要：A schema is a collection of database objects. A schema is owned by a database user and has the same name as that user. Schema objects are the logical structures that directly refer to the database's data. Schema objects include structures like tables, views, and indexes. (There is no relationship between a tablespace and a schema. Objects in the same schema can be in different tablespaces, and a tablespace can hold objects from different schemas.) 阅读全文

摘要：There are 2 common ways to architect a database: client/server or multitier. As internet computing becomes more prevalent in computing environments, many database management systems are moving to a multitier environment. 阅读全文

摘要：An Oracle database is a collection of data treated as unit. The purpose of a database is to store and retrieve related information. A database server is the key to solving the problems of information management. In general, a server reliably manages a large amount of data in a multiuser environment so that many users can concurrently access the same data. All this is accomplished while delivering high performance. A database server also prevents unauthorized access and provides efficient solutio 阅读全文

摘要：Hi，推荐文件给你 "2012OOW-TomOracle12cTop12NewFeature.pdf" http://vdisk.weibo.com/s/fkMj9 阅读全文