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Define query optimization.
Query optimization refers to the process of search the lowest -cost method of evaluating a given query.
A Distributed Transaction Let us demonstrate the concept of a distributed transaction by considering a banking system having of three branches located in 3 different cities. Ev
Explain the structure of well formed formulae in relational calculus. Ans: a. An atom is a formula b. If P1 is a formula, after that so are ¬P1 and (P1) c. If P1 and P2 a
In Database software have only pure security or some dis secured by administrator?
define lock conversion
I need help with some assignments
Give the general form of SQL query? Select A1, A2............., An From R1, R2..............., Rm Where P
State the meaning of Object Representation The term object representation means "to represent object with the help of objects model symbols". Implementing objects is too simp
You are required to implement integrity constraints within the database to enforce the following requirements: For Projects: Start date must be supplied. Start date cannot be i
i want notes on this topic
Need For Distributed Database Systems A distributed database is a set of database kept on multiple computers that appears to applications as a one database. As a result, an app
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