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Example - ALTER TABLE emp MODIFY (empno NUMBER (7));
State The position of object at any moment is called state. An object can have many states depend upon time. After receiving some input instructions, the object can change its
#question. acompani datdbase needs to store information about employees (identified by a social security number,with salary and phone as attributes) and departments (identified by
What is inheritance? Inheritance is an object orientation concept that allows reusability of code / design. Basic sense of inheritance is that if one class is predefined than a
multidimensional data model
Aggregation Aggregation is stronger form of association. It represents the "has-a" or "part-of" relationship. An aggregation association depicts a complex object which is comp
Create centralized relational database using bottom up method. (a) Recognize a single un-normalized relation for the above scenario. (b) Recognize the primary key for
What is Identity? Identity (or AutoNumber) is a column that automatically produces numeric values. A start and increment value can be set, but most DBA leave these at 1. A GUID
What are the various symbols used to draw an E-R diagram (any 3)?
What is storage manager? A storage manager is a program module that gives the interface between the Low level data kept in a database and the application programs
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