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Many-to-many: Entities in A and B are related with any number of entities from each other.
Example:
Taught_by Relationship among course and faculty.
One faculty member can be assigned to teach a lot of courses and one course may be taught by a lot of faculty members.
Relationship among book and author.
One author can explained a lot of books and one book can be written by more than one authors.
More about Relationships and Entities
notes about update opreation
Define Physical and Logical independence Ans: Physical data independence: The ability to modify physical level without causing application program to be rewritten. Logic
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Explain the Dynamic Hashing Techniques There are two methods in it: extendible hashing - stores an access structure in addition to the file, and therefore is somewhat identica
What is an Index? An index is a small table having only two columns. The first column has a copy of the primary or candidate key of a table and the second column having a set o
What is conceptual model ? A conceptual model is a independent of both hardware and software.
In this practical assignment, we will run through a complete database application development cycle, starting with the schema design, from an initial data import to database applic
under what condition log based recovery is feasible?
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
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