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State the data flow diagram of functional model Any action initiated by transition in the state diagram can be extended into an entire data flow diagram in functional model. Th
What is Primary key? Primary Key - Primary key is one of the candidate keys which uniquely identifies each row in the relation.
List the drawbacks of relational database system A) Repetition of data B) Inability to s certain information.
To delete a particular column in a relation which command is used ? To delete a particular column in a relation ALTER command is used.
Objectives After reading this unit you should be able to: Explain storage of databases on hard disks; Discuss the execution of various file Organisation techniques;
What are the disadvantages of file-processing system? Ans: The Disadvantages of File-Processing System a. Data redundancy and inconsistency - Data redundancy means not nece
Write short notes on Schema diagram. A database schema along with primary key and foreign key dependencies can be depicted pictorially by schema diagram. Every relation appears
Explain in details about the f unctions of DBA ?
management information system based on functional organisation
(a) Data Mining Process : In the context of this cluster analysis project , and in your own words , explain how you would execute the first stage of data mining, namely the "P
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