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Explain the three data models namely relational, network and hierarchical and evaluate their relative advantages and disadvantages. Hierarchical Model: In hierarchical model, da
Define access time. Access time is the time from when a read or write request is issued to when data transfer starts.
What is the full form of ODBC ? ODBC stands for Open Database Connectivity.
A super key is an attribute or set of attributes used to recognize the records uniquely in a relation. For instance, in the Relation PERSON defines earlier PERSON_ID is a super
What is trigger? Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.
Client Server Databases- The concept behind the Client/Server systems is simultaneous, cooperative processing. It is an approach that presents a one systems view from a user's vie
Hi is anyone well versed in accounting information systems available now to help me work through an important assignment due tomorrow at noon?
define anomalies and different types of anomalies with example
How does Tuple-oriented relational calculus vary from domain-oriented relational calculus? The tuple-oriented calculus uses a tuple variables i.e., variable whose only allowed
What is inheritance? Define it in detail? Inheritance Inheritance can be at the levels of types, or at the level of tables we first consider inheritance of types, then i
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