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comparison of oracle RDBMS with MySQL
Answer SQL Queries to extract data from data tables and questions on mapping conceptual data models into relational data model.
Functional Dependency Consider a relation R that has 2 attributes A and B. The attribute B of the relation is functionally dependent on the attribute A if and only if for every
Define Direct file organization? The direct file organization is employed to enhance the performance in accessing the records than sequential file organization. In direct file
What types of adjustments are required to increase chances of inheritance. a) Some attributes can be added or ignored in the base class operation b) Some changes can be
Define a relation ? Relation - A relations is a named two-dimensional table of data. Mathematically, a relation can be described as a subset of the cartesian product of a lis
Create an entity relationship diagram, Database Management System
Describe disk manager and their work? Disk Manager: Responsible for fetching data regulated through file Manager from disk storage within Main memory and deciding what data to
Define access time. Access time is the time from when a read or write request is issued to when data transfer starts.
what do you mean by primary key constraint?
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