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What is known as clustering file organization? In the clustering file organization, records of several dissimilar relations are stored in the similar file.
what is query processing?
deffine class&object
how many hourse have been spent on a certain project
QUESTION (a) Consider a car database consisting of car model, car make, car origin, Engine capacity, color, cost.
Relational and E-R Model There are three types of constraints on relational database that have: DOMAIN CONSTRAINT PRIMARY KEY CONSTRAINT INTEGRITY CONSTRAINT
Which database object does not physically exist? A view database object does not physically exist.
Examples:- Hierarchical Model: It tells data as and relationships by hierarchy of data values. Figure illustrates an example of hierarchical model. Now a day's these models are
What is the use of sub queries? A sub query is a select-from-where expression that is nested with in another query. A common use of sub queries is to do tests for set membershi
Explain the term- signal-to-noise ratio A signal-to-noise ratio of 20 dB means that S/N = 100. As log2101 is around 6.658, the Shannon limit is around 19.975 kbps. The Nyquist
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