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Compute the closure (F+) for the following set of the functional dependencies defined on R(a,b,c,d), where F - {c→a, ab→d, a→b, d→c}, i.e. what are all of the FDs implied by F (Hint; there's 24 of them).
Failures and Recovery In practice various things might occur to prevent a transaction from completing. Recovery methods are used to bring database, which does not satisfy consi
To do the division operation R1 ÷ R2, R2 should be a correct subset of R1. In the following example R1 have attributes A and B and R2 have only attribute B so R2 is a correct subse
What is transaction? Collections of operations that form a single logical unit of work are known as transactions.
What is Primary key? Primary Key - Primary key is one of the candidate keys which uniquely identifies each row in the relation.
differences between a classified catalog and a dictionary catalog
What are the two distinct aspects to the implementation of associations? i) It is required to define data declarations which will enable details of actual links to be stored. I
i need to implememnt a treee based mining algorithm. do you have an expert that can do that?
give some example real life situation where DBMS are most suitable
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.
tell me the functionality,advantages and disadvantages of student database
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