ENB352 Lecture : INB210 Introduction to Databases.pdf
29 Jul 2013
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Document Summary
It can be thought of as a digitized filing cabinet. Large organizations need to record large volumes of data. Using computers requires information to be retrieved, updated and stored on a digital device. Contains information primarily of interest to only one person. Containing information concerning a specific part of an organization. Equivalent to each department having their own group of filing cabinets". All of an organization"s information. Allows for the organizations workload to spread across computers. Harder to develop programs that require data from one or more databases at the same time. Easier to forget to backup. Because of complexity, corporate databases are rarely found in larger organizations. Nonetheless, because of data redundancy, it is important to minimise the number of databases in any organization, In other words, it is important maximise the sharing of databases. The central idea of a relational database is that all the data is stored in a collection of tables.
