What is a derived (artificial) primary key
What is a derived (artificial) primary key? When must this be used?
Expert
Using a name like the primary key violates the principle of stability. The social security number may be a valid choice, other than a foreign employee may not have a social security number. It is a case where a derived, quite than a natural, primary key is suitable. A derived key is an artificial key which you create. A natural key is one which is already part of the database.
Write a short note on the difference between the disjoint and overlap rule.
Illustrates the Delete commands.
What is Database testing?
Illustrates the properties of Cursors in brief?
Explain the types of the Containers?
Mini-Case The Hatcher Company is in the process of developing a new inventory management system. One of the event handling processes in that system is Receive Supplier Shipments. The (inexperienced) systems analyst on the project has spent time in the warehouse observing this process and develo
Write down brief note on the issues for database performance?
Why not the PHENIX, the Zelinka or Otwinoski libraries and so forth?
States the term Volatile temporary tables.
Explain some of the ETL Tools?
18,76,764
1948066 Asked
3,689
Active Tutors
1454704
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!