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Heterogeneous Database: In a heterogeneous distributed database, different sites can use different schema and software that can lead to problems in query ...
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The database is distributed among wired and wireless components. Data management responsibility is shared among base stations or fixed hosts and mobile units.
A record is a data structure composed of other data structures or primitive data elements. Records are used as a unit of input and output to files or databases.
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Database Applications: Banking: transactions; Airlines: reservations, schedules; Universities: registration, grades; Sales: customers, products, purchases ...
Database – collection of persistent data; Database Management System (DBMS) – software system that supports creation, population, and querying of a database.
A modern database system is a complex software system whose task is to manage a large, complex collection of data. Databases touch all aspects of our lives.