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construct an er diagram for a hospital with a set of patients and a set of medical doctors. associate with each patient a log of various test and examination conducted.convert er d
Why Like predicate used for? LIKE predicate: The LIKE predicate searches for strings in which have a certain pattern.
What does the extract statement do in extract datasets? The data is written to virtual memory by extract commands.
what is union compatable?
In E-R diagram how generalization is represented? in E-R diagram generalization is represented by Triangle shape.
definition and its work
Define the Canonical cover Ans: A canonical cover F c for F is a set of dependencies like F logically implies all dependencies in F c , and F c logically entails all dependen
What is the archtetype/instance pattern? The archetype/instance pattern happens when one entity tracks occurrences of another entity. A common example is the relationship among
Explain CNT in the respects of QBE ? CNT: It is one of the aggregation commands given in QBE. It is used to identify number of tuples
Explain Clustering file organization (i) Determine if a record of file is physically ordered on a nonkey field - that does not comprise a different value for each record - that
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