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Can a filed occur in several field groups.
Yes. But it leads to redundant data redundancy.
A B-tree of order how much children m has maximum ? m has maximum m mchildren in a B tree.
UNION If R1 and R2 are two union compatible relations then R3 = R1 ∪ R2 is the relation having tuples that are either in R1 or in R2 or in both. In case, R3 will have tuples
i need help with creating database system for a library
Define database management system? Database management system (DBMS) is a set of interrelated data and a combination of programs to access those data.
Question: A DBMS built for Online Transaction Processing (OLTP) is generally regarded as unsuitable for data warehousing. Each system is designed with a different set of requir
What is B-Tree? A B-tree eliminates the redundant storage of search-key values .It permits search key values to appear only once.
Attributes that are directly kept in the data base. For example, 'Birth date' attribute of a person. Derived Attributes that are not stored directly but can be derived
Sequential File Organisation The most necessary way to organise the collection of records in a file is to use sequential Organisation. Records of the file are stored in series
Define the Query optimisation The query parser commonly generates a standard initial tree to correspond to an SQL query, with no doing any optimization. Such type of a canonica
I am doing research in this area, especially in sime join and join efficacy when several relations have been queried. Relations located in different sites. I need something like n
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