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What is a Data Flow Diagram?
Data Flow Diagram: A data flow diagram is the graph that shows flow of data values from their sources in objects in the course of processes which transform them to their destinations in other objects.
It does not show how values are controlled while computation. The Data Flow Diagram shows functional relationship of values computed by a system. DFD contains processes which transform data, data flows which move data, actor objects which produce and consume data and data store objects which store data passively.
distributed quey processing
Which model is record based logical model? Network Modelis basically known as record based logical model.
Explain three main attributes of data.
Strict 2PL :Though, this basic 2PL suffers from the trouble that it can result into loss of isolation / atomic property of transaction as theoretically speaking once a lock is rele
Q. State the Technique for converting a state diagram to code. i) Identify the major control path. Starting with first state, find the path from diagram that corresponds
what is difference between circular inked lust and grunded linked list
Which database object does not physically exist? A view database object does not physically exist.
I am using Siteground. And my database is full of limit so need someone who reduces the data which no need. This is very simple and simple task. Skills required are Databa
Example: //REVOKE ALL ON EMP FROM MCA12; (All permissions will be cancelled) You can also cancel only some of the permissions. Drop: A user-
Update or Modify operation alters the existing values. If these operations alter the value that is the foreign key also, the only check need is the similar as that of the Insert op
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