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Hi I have got an assignment for making an er diagram for market management software can any budy help me?
Atomicity: It describes a transaction to be a one unit of processing. We can also say either a transaction will be finished completely or not at all. In the transaction example 1
What is the use of integrity constraints? Integrity constraints make sure that changes made to the database by authorized users do not result in a loss of data consistency. The
What is system catalog or catalog relation? How is better known as? A RDBMS maintains a explanation of all the data that it contains, information about every relation and index
What are multiple inheritances? Multiple inheritances allow a class to inherit variables and methods from many super classes.
What is transaction? Collections of operations that form a single logical unit of work are known as transactions.
Explain concurrency control? Concurrency control Oracles multiversion concurrency control varies from the concurrency mechanism used by some other data base vendors. Read
The need for three level architecture The aim of the three level architecture is to divide each user's view of the database from the way the database is physically shown.
multiplicity constarin
State about the Use Case Diagram A use case diagram represents a set of use cases, actors and their relationships. These diagrams shall be used to model context or requirement
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