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Explain I command in QBE ?
I : It is the command in QBE that is used to insert tuple (s) into the database
What is transaction? Collections of operations that form a single logical unit of work are known as transactions.
Describe the Association: Design Before we describe association design let us define association "Association is set of links between two objects in the object model". It is
explain equi-join using illustration
what are the states of transaction?
Why 'AS' clause is used in SQL ? 'As' clause is used for Rename operation. ‘AS' clause is used in SQL for rename operation. (e.g., SELECT ENO AS EMPLOYEE_NO FROM EMP)
1. Determine that the Checkpoints are a part of Ans: Checkpoints are a part of Recovery measures
Object-based Models: Use objects as key data representation components . Examples:- Entity-Relationship Model: It is a collection of real world objects known as entitie
i need help for assignment ..
Consider a systems development project with the following data Activity Duration (weeks) Precedence Relationship 1. Software design
Determine the language that needs a user to specify the data to be retrieved with no specifying exactly how to get it is Ans: Non-Procedural DML
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