ER model, Database Management System

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coventions for displaying an ER schema as ER diagram

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Need for distributed database systems, Need For Distributed Database System...

Need For Distributed Database Systems A distributed database is a set of database kept on multiple computers that appears to applications as a one database. As a result, an app

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The data of a view is not physically stored, but derived from one or more tables. True the data of a view is not physically stored

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Aggregation : One limitation of the E-R diagram is that they do not permit representation of relationships between relationships. In such a case the relationship along with its ent

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What is nested relational model? The nested relational model is an extension of relational model in which domains might be either atomic or relation valued.

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Describe the statement in SQL which allows to change the definition of a table? In SQL Alter statement is used to allow the changes the definition of a table.

Define the basic operations of the relational algebra, Define the basic ope...

Define the basic operations of the relational algebra?     Ans: Basic operators of relational algebra are: 1. Union (∪) - Selects tuples which are in either P or Q or in bot

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What is De-normalization? De-normalization is the method of attempting to optimize the performance of a database by adding redundant data. It is sometimes essential because cur

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prototype of a distributed information system for a national car part retail outlet chain.

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