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explain thee diffrent types of data models
What is Object Oriented model? This model is based on collection of objects. An object has values stored in instance variables with in the object. An object also having bodies
Database Recovery And Security Introduction In this part we will introduce two main issues relating to database management systems. A computer system suffers from dissi
which component of DBMS can be embedded in a program? The data manipulation language (DML) is a component which is embedded in a program.
What is a foreign key, and what is it used for? A foreign key is used to establish relationships between relations in the relational model. Technically, a foreign key is a colu
A database to track your progress in your college program will track your progress towards graduation! A database that has information containing the classes that you have taken, c
examples of fields in a database
Example RELATION SCHEMA for STUDENT: STUDENT (Roll No: string, name: string, login: string, age: integer) RELATION INSTANCE
For every multivalued attribute 'A', we make a new relation R that contains an attribute corresponding to plus the primary key attribute k of the relation that shows the entity typ
In Database software have only pure security or some dis secured by administrator?
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