ER diegrams, Database Management System

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How to draw an ER diagram to a finance companz

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Alter table command, ALTER TABLE Command : This command is used for variati...

ALTER TABLE Command : This command is used for variation of existing structure of the table in the given situation: When a new column is to be added to the table structure.

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Implementing software control To implement software control designer must redesign strategy of state event model which is present in dynamic model. There are three basic ap

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What is a block and a block number? A block is a contiguous sequence of sectors from a single track of one platter. Every request specifies the address on the disk to be refere

Referential integrity constraint - relational constraints, It defines that ...

It defines that the tuple in one relation that refers to another relation must refer to an existing tuple in that relation. This constraint is states on two relations (not essentia

Write a short note on participation role, write a short note on participati...

write a short note on participation role? Participation role: roles are indicating in E-R diagram by labelling the lines that connect diamonds to rectangles.

Relationship, what is the relationship between receipt and owner entities i...

what is the relationship between receipt and owner entities in computer sales and service company

Explain the use of constraints in functional model, Explain the use of cons...

Explain the use of constraints in functional model with suitable example. A constraint shows relationship between two objects at same time, or   among various values of the sam

What is repository?, Problem 1 Why are the operational system keys not ...

Problem 1 Why are the operational system keys not recommended for forming data warehouse primary keys? Give any two examples 2 Explain the following performance tuning techn

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Define Two phase commit Two phase commit: To make sure atomicity, all the sites where a transaction is being executed must agree on the final outcome of the execution. The tran

Discuss the three level architecture of dbms, PRINCIPLES OF DATABASE 1....

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