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Explain the main advantages of DBMS over File Oriented System ?
Consider the subsequent relations along with keys underlined Street (name, location, city) House (number, street_name) Lives (name, house_number) Define the above relations
What is RDBMS terminology for a row? A tuple is a RDBMS terminology for a row
List the table modification commands in SQL? A) Deletion B) Updates C) Insertion D) Update of a view
Why is need for the multiple access paths?
Event Occurrence of a process is called event. In other words, the object can receive many input instructions. The changes which occur due to these instructions are known as e
What is the use of with clause in SQL? The with clause gives a way of defining a temporary view whose explanation is available only to the query in which the with clause occurs
Association as a cache This association must be updated when any new element is added to it, but testing for overlap using association is more efficient. Figure:
Differentiate between natural join and outer join? Natural join is a binary operator which is written as (R * S) where as R and S are relations. The output of the natural join
Q. Explain the terms key constraints participation constraints and mapping caradinalities in ER model. Participation Constraints : The participation of an entity set E i
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