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Explain heap file with advantages?
Heap File is an unordered set or a group of records, stored on a set of pages. This class gives basic support for inserting, updating, selecting, and deleting records. Temporary heap files are used for external sorting and within other relational operators. A sequential scan of a heap file (through the Scan class) is the most primary access method.
How persistent programming languages differ from traditional programming languages? Database languages vary from traditional programming languages in that they directly manipul
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Which method of access uses key transformation? A Hash method of access uses key transformation.
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Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
Farmer Bob, Farmer Jane and Farmer Jose run a cow farming co-op. For every cow they keep the cow’s name, age (or date of birth), breed and numbered plastic ear tag. The each of t
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What is the difference between SQL Server 2000 complete and differential backups? A complete backup makes a copy of the whole database. A differential backup creates a copy of
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