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What is a recursive relationship? Give an example not used in the text.
A recursive relationship is a relationship among an entity and itself. For example, given the entity PERSON, a recursive relationship could be used to show a PERSON and his or her SIBLINGs (brothers and sisters).
What is the main advantage of the object model? What are its different components? The object model focuses on the logical data structures. Each object model comprises of many
HOW MANY TYPES OF VIEWS
Describe the various types of Online Analytical Processing (OLAP) tools and briefly discuss how the support common analytical operations.
explain external view
The State of NewYork certifies firefighters throughout state and keep track all of them, as well as of the state’s fire departments. Each fire department has unique department numb
WHY SHOULD NULL IN A RELATION BE AVOID AS possible?
DISADVANTAGES OF RDBMS
Concurrency issues Data integrity: Threads accessing same object need to be synchronized, such as: banking account. Deadlock: One or more threads in system are perman
Question 1 Create a table student with attributes student name, roll number, total marks and percentage. Do the following operations Insert details in to the table Update
What is transaction? Collections of operations that form a single logical unit of work are known as transactions.
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