DISTIBUTED DATABASE, Database Management System

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Define physical image of a global relation at a site

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Equi Join: A join in which the joining condition is based on equality among values in the common columns. Common columns show (redundantly) in the result table. Let us Consider th

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Create centralized relational database using Top down method- Construction of Logical Model: Translation EERD into Relational Schema: Use the 8 steps algorithm of converting EERD

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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

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Limitations of File Based System The file-based system has some limitations. The limitations are listed as follows: Isolation and separation of data: When the data is

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What do you mean by Correlated subquery? Subqueries, or nested queries, are used to bring back a set of rows to be used by the parent query. Depending on how the subquery is writ

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Why Like predicate used for? LIKE predicate: The LIKE predicate searches for strings in which have a certain pattern.

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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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