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the description in section 2021 of the analysis phase made the simplifying assumption that no log records appeared
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consider the following bcnf relations which describe departments in a company and employeesyou are told that the
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consider the following bcnf relational schema for a portion of a university database type information is not relevant
we described variations of the join operation called outer joins in section 564 one approach to implementing an outer
1 what is the goal of query optimization why is it important2 describe the advantages of pipelining3 give an example in
consider the join given the following information about the relations to be joined the cost metric is the number of
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let r be decomposed into r1 r2 rn let f be a set of fds on r1 define what it means for f to be preserved in the set of
a program needs to read a sequential access fi le line by line and display each line on the computer screen the fi le
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pp study both the technical and user documentation of a system at your disposal are you satisfied with them discuss
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a 1999 computer society survey lists the following candidate fundamental principles of software engineeringa apply and