relational data base management system, Database Management System

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explain in detail about crash recovery

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Describe log based recovery, Describe log based recovery The most usabl...

Describe log based recovery The most usably structure for recording data base modification is the LOG the log is a sequence of log records recording all the update activities i

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What are the advantages of by using an index and what are its disadvantages ? In difference, if the search key of a secondary index is not a candidate key, it is not sufficient

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Explain Recursive relationship type? Recursive relationship type: A recursive relationship is one in that the similar entity participates more than once in the relationship

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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

Domain constraint, Domain Constraint It shows that each attribute in a ...

Domain Constraint It shows that each attribute in a relation has to contain an atomic value only from the corresponding domains. The data types associated with commercial RDBMS

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Define the term Domain. For each n every attribute there is a set of permitted values known as the domain of that attribute.

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Explain the cartesian product, Explain the Cartesian product:  The Cart...

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Relational DB, Suppose R is a relation with attributes A1, A2,..., An. As a...

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