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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 entity on the other side of the relation (say E2) as a foreign key attribute in the table of E1. We contain all easy attributes (or easy components of a composite attributes of R (if any) in the table of E1).
For example, the works_in relationship among the DEPARTMENT and FACULTY.
For this relationship choose the entity at N side, i.e., FACULTY and add primary key attribute of one more entity DEPARTMENT, i.e., DNO as a foreign key attribute in FACULTY.
FACULTY (CONTAINS WORKS_IN RELATIONSHIP
ID
NAME
ADDRESS
BASIC_SAL
DNO
These permit the user to unload a database or parts of a database and reload the data on the similar machine, or on another machine in a dissimilar location. This can be useful in
distributed quey processing
A table joined with itself is called ? A table joined with itself is known as self join table. Normal 0 false false false EN-IN X-NONE X-NONE
can you please explain with the help of suitable example the difference between conflict equivalence and conflict serializability?
Attribute Preservation This is a easy and obvious necessity that includes preserving all the attributes that were there in the relation that is being decomposed.
Draw the database using the ER approach and then make the tables accordingly. Populate the tables so that every table have at least 10 tuples. Then using Java and SQL, execute the
What is entity in DBMS? Entity: A DBMS entity is either a thing in the modelled world or a drawing element in an ERD.
What is known as heap file organization? In the heap file organization, any record can be placed anywhere in the file where there is space for the record. There is no ordering
Question 1 What do you mean by database management system? Question 2 Write a note on Object-Oriented Model Question 3 Explain Sequential File Organization Question
Explain Transaction manager and their work? Transaction Manager: Ensure the database remains in a constant (correct) state despite system failure, and in which concurrent trans
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