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Data Analysis Why analyse data? A basic form of database is a flat file of data. The file is made up of a series of records and each record has a series of fields in it. Top of File First Record Last Record Bottom of file Records may be fixed length (padded with spaces) or variable length (e.g. comma delimited). As we move to more complex applications, the type of data we work with expands. Eventually the flat file or single table becomes unsuitable. There may be many users that need to get access to the data for view or edit. Having more that one user updating the file at once causes problems. Different areas of the program may require access to different parts of the data. If the data is organised, smaller amounts need to be open for update. This improves accessibility and therefore performance. Speed of access reduces with increasing record count and record length. Often...

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