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Database: set of interrelated, centrally coordinated data files, that are stored with as little data redundancy as possible. Database controls the data stored in the database. The database, the dbms and application programs that access the database through dbms are referred to as the database system. The database administrator (dba) is responsible for coordinating, controlling and managing the database. Business intelligence: analyzing large amounts of data for strategic business decision making. 2 main techniques: online analytical processing (olap): using queries to investigate hypothesized relationships among data, data mining: using sophisticated statistical analysis to discover" un-hypothesized relationships of the data. Advantages of database systems: data integration, data sharing, minimal data redundancy + inconsistencies, data independence, cross-functional analysis. Note: it is very important to maintain good data; incorrect database data can lead to bad decisions, angry users, embarrassment, costly etc. The sarbanes-oxley act states that top executives face prosecution if a company"s financial data are not in order.

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