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Fundamentals of Database Systems. Three-Schema Architecture & Data Independence DBMS Languages, Interfaces & Classification Database System Environment
Typology: Cheat Sheet
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most popular data model used today is the relational data model.. the object-oriented database model represents database as a collection of tables, having fields or attributes.. Database System Environment the different component modules in dbms let us look into each of these modules in detail. In addition to these modules most database management systems have database system utilities that help the database administrator to manage the system. The common utilities have the following types of functions so the common utilities are used to load existing data files into the database. The backup utility creates a backup copy of the database and with this backup copy we can restore the database in case of any kind of system failures. The next type of utility that we have is the file reorganization utility this utility is used to reorganize a database file into a different file organization.