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what is query processing ,query optimization and performance turring?
State the Component Diagram A component diagram represents a set of component and relationships among them. In a dynamic model, component diagram is used to model physical com
what is RDBMS? how it works? good example.
in an organization several projects are undertaken. Each project can employ one or more employees. Each employee can work on one or more projects. Each project is undertaken on the
Explain I command in QBE ? I : It is the command in QBE that is used to insert tuple (s) into the database
What is Identity? Identity (or AutoNumber) is a column that automatically produces numeric values. A start and increment value can be set, but most DBA leave these at 1. A GUID
Define the term Domain. For each n every attribute there is a set of permitted values known as the domain of that attribute.
Isolation or Independence : The isolation property shows that the updates of a transaction should not be visible till they are committed. Isolation assurance that the progresses of
Explain the function of Object model Object model describes the classes of objects in system, including their attributes and operations which they support. The analysis object
Synonyms It allows short names or alternative names for objects. Example : CREATE SYNONYM D30 FOR EMPD30; Now if we give command:
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