create table, Database Management System

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What are the advantages of creating a table from existing table?

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What is a super key? A super key is a set of one or more attributes that collectively permits us to recognize uniquely an entity in the entity set.

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What is foreign key? A relation schema r1 derived from an ER schema may contain among its attributes the primary key of another relation schema r2.this attribute is known as a

One-to-many relationship, For each 1: n relationship type R involving two e...

For each 1: n relationship type R involving two entities E1 and E2, we recognize the entity type (say E1) at the n-side of the relationship type R and contain primary key of the en

Properties of a transaction , Properties of a Transaction        A tra...

Properties of a Transaction        A transaction has four main properties. These are: Atomicity Consistency Isolation or Independence Durability or Permanen

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losers with new information systems

Data replication, Data Replication "If a relation R has its copies kept...

Data Replication "If a relation R has its copies kept at two or more sites, then it is considered replicated". But why do we replicate a relation? There are several advan

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State the process of Rearranging Classes and Operations The various, yet similar operation of different classes can be slightly modified thus that they can be covered by a sin

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What are the different kinds of database end users? Discuss the major activities of each? End-Users - End-users are the people whose jobs need access to the database for que

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Write the motivations led to development of OO-DBMS? 1.  Programmer frustration with RDBMSs. 2.  Requirement for special features.

In e-r diagram how relationship type is represented, In E-R Diagram how rel...

In E-R Diagram how relationship type is represented ? In E-R Diagram relationship type is represented as a Diamond.

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