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Determine object representation
As a designer, we must choose properly that when to use primitive types in representing objects and when to combine groups of related objects, what is exact representation of object attributes.
what are the main characteristics of database
Describe five main functions of a database administrator. Ans: A database administrator (DBA) is a person who is accountable for the environmental aspects of a database. Genera
Creating views with Read only option : In the view definition this option is used to make sure that no DML operations can be done on the view.
differences between a classified catalog and a dictionary catalog
Support by Adding Indexes Multiple indexes can be used to access a data file by multiple access paths. In such a scheme only single copy of the data is consider, only the numbe
Example: Consider the following relations: ROLLNO NAME ADDRESS COURSE_ID 100 Ka
why we fregment at all?
Explain Foreign Key? Foreign Key - Let there are two relations (tables) R and S. Any candidate key of the relation R that is referred within the relation S is known as the fo
Can we delete data element, which is being used by table fields. No we cant delete data element.
What is a Name? A user-supplied name is used for identity. This form of identity is used for files in file systems. The user gives every file a name that uniquely identifies it
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