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Ko'proq ko'rsatish1 303
Obunachilar
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Postlar arxiv
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More than one of the file fields is designated to be the hash key of the file.
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Reading the records in order of the ordering field is not quite efficient.
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A binary search can not be used to search for a record on its ordering field value.
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Insertion is not expensive: records must be inserted in the correct order.
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File records are kept sorted by the values of an ordering field.
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Reading the records in order of a particular field requires sorting the file records
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New records are inserted at the end of the file in Unordered Files
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A file can have fixed-length records or variable-length records.
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Blocking factor is the (average) number of file records stored in a disk block.
