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Question 1 Explain the concept of Foreign Key. How a foreign key differs from a Primary Key? Can the Foreign Key accept nulls? Question 2 With a necessary example explain (i)
Draw an EER diagram that captures the "is-a" hierarchy of students in another simple database. The database captures both the "basic" information (say, student ID and student name)
create an er diagram for production management in film industry
Ask questiwhat is row indicator in database on #Minimum 100 words accepted#
What is Disadvantages Of DBMS ? 1. Cost of Software and Hardware and Migration - A important disadvantage of the DBMS system is cost. 2. Reduced Response and Throughpu
What is a primary index? A primary index is an index whose search key also explains the sequential order of the file.
Desirable Properties Of Decomposition Decomposition is a process of dividing a relation into its projections that will not be disjoint. Please remind the Relational projection
Implementing software control To implement software control designer must redesign strategy of state event model which is present in dynamic model. There are three basic ap
What are called jukebox systems? Jukebox systems have a few drives and numerous disks that can be loaded into single of the drives automatically.
Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department.
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