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Data access typically refers to software and activities related to storing, retrieving, or acting on data housed in a database or other repository. There are two types of data access, sequential access and random access.
Data Access is simply the authorization you have to access different data files. Data access can help distinguish the abilities of Administrators and users. E.g. Admins may be able to remove, edit and add data, while a general user may not be able as they don’t have the access to that particular file.
Historically, different methods and languages were required for every repository, including each different database, file system, etc., and many of these repositories stored their content in different and incompatible formats.
In more recent days, standardized languages, methods, and formats, have been created to serve as interfaces between the often proprietary, and always idiosyncratic, specific languages and methods. Such standards include SQL, ODBC, JDBC, XQJ, ADO.NET, XML, X Query, X Path, and Web Services.
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