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Explain data abstraction?
Data abstraction Data abstraction is a methodology in which enables us to isolate how a compound data object is utilized from the details of how it is constructed from more primitive data objects.
Define shadow paging. An alternative to log-based crash recovery method is shadow paging. This technique requires fewer disk accesses than do the log-based methods.
Candidate Key: In a relation R, a candidate key for R is a subset of the set of attributes of R, which have the differnt two properties: (1) Uniqueness: N
1. Determine that the Checkpoints are a part of Ans: Checkpoints are a part of Recovery measures
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I need to Map an E-R diagram to a relational schema
Using the questions found at the end of Chapter 9 in your textbook, complete this homework activity. Students will submit a Word document answering questions 2, 3, and 4.
The Maximum no of key fields that can be used in a header is?? 50
what are information system hirarchy?
Have database built but having problems with some questions that go with the database
pine vally company
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