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Explain the Cartesian product: The Cartesian product operation does not need relations to union-compatible. The meaning of this is that the involved relations may have dissim
What is the difference among a database schema and a database state? The collection of information stored in database at particular moment in time is known as database state a
System R was developed and designed over a period of 1974-79 at IBM San Jose Research Company. Its purpose was to illustrate that it is possible to create a Relational System tha
What is storage manager? A storage manager is a program module that gives the interface between the Low level data kept in a database and the application programs
Write a Query that uses the UNION Operator 1. Use the Software Experts database to: a. Display the first and the last name of all consultants who worked on any projects f
How does the system cope up with a record crash when recovery is going on after the first crash? Ans: In a system the undo and redo operations are needed to be idempotent to c
What is called query processing? Query processing refers to the range of activities included in extracting data from a database.
What does Aggregation mean?
why three level architecture had been developed/
With the linear commit protocol, sites are connected in a chain, and the subtransaction at the left-hand end of the chain initiates the protocol. Propose a crash recovery protocol
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