Advanced Databases are becoming more Brother cell phone list rampant, advantageous and applicable to real life as developers of these databases strive to make that happen. In this article, I give an overview of several advanced databases and explain Brother cell phone list why they are important Here I cite three such kinds of databases: 1. Distributed Databases A distributed database is a database with one common schema whose parts are physically distributed Brother cell phone list via a network. For a user, a distributed database appears like a central database i.e. it is invisible to users where each data item is actually located.

However, the database management Brother cell phone list system (DBMS) must periodically synchronize the scattered databases to make sure that they have all consistent data. Advantages: Reflects organizational structure: database fragments are located in the departments they relate to. Local autonomy: a department can control the Brother cell phone list data about them (as they are the ones familiar with it) Improved availability: a fault in one database system will affect one fragment instead of the entire database. Improved performance: data is Brother cell phone list located near the site of greatest demand; the database systems themselves are parallelized, allowing load on the databases to be balanced among servers.

(A high load on one module of the database Brother cell phone list won't affect other modules of the database in a distributed database) Ergonomics: It costs less to create a network of smaller computers with the power of a single large computer. Modularity: Systems can be modified, added and removed from the distributed database without affecting other Brother cell phone list modules (systems). 2. Data Warehouses A data warehouse (DW) is a Brother cell phone list subject-oriented, integrated, non-volatile and time-variant collection of data in support of Brother cell phone list management's decisions. (Inmon's definition). Explanation: Subject-oriented: The Brother cell phone list system focus is not on the applications required by the different departments of a company (e.g.