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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 field is known as the clustering field. The sort of index that is created using clustering field is known as clustering index. Clustering index is employed to speed up retrieval of records that have similar value for the clustering field.
The file which is organized based on the clustering field and clustering index is known clustering file organization.
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Types of Data fragmentation
The Form input elements are: Reporter name text type input Password
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Compute the closure (F+) for the following set of the functional dependencies defined on R(a,b,c,d), where F - {c→ a, ab → d, a → b, d → c}, i.e. what are all of the FDs implied b
why we fregment at all?
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