database relational model, Database Management System

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what do you mean by primary key constraint?

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Foreign keys , Foreign Keys and NULL Let us take the relation:         ...

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While using extract datasets it is required to have a special workarea for interface False.  It is not required to have a special workarea for interface

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What is a virtual table that draws its data from the result of an SQL SELECT statement? View is a virtual table that draws its data from the result of an SQL SELECT statement.

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Describe the types of Inheritance 1.  Single inheritance 2.  Multiple inheritance 3.  Hierarchical inheritance 4.  Multilevel inheritance

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What is conceptual model ? A conceptual model is a independent of both hardware and software.

Database Models, Benefits and Limitations od Data Models?

Benefits and Limitations od Data Models?

Eliminate redundant data, Eliminate Redundant Data In the "Database Rel...

Eliminate Redundant Data In the "Database Relation" above, the primary key is made up of the D-ID and the Emp-ID. The database-name relies only on the D-ID. The similar databas

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Designing the fields in the data base The following are the considerations one has to remain in mind while designing the fields in the data base. Coding, compression, en

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