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Evaluate, compare and contrast the two methods of relational database design namely top down method and Bottom up method. What will be your choice if you are asked to select a method? Justify your choice.
What are called index-sequential files? The files that are ordered sequentially with a primary index on the search key are known as index-sequential files
Define the concept of aggregation. Give two examples where this concept is useful. Ans: Aggregation transforms a relationship among the objects into a higher-level object. A
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
Describe the primary key functions? Primary Key : The primary key is an attribute or a set of attributes in which uniquely identify a specific example of an entity. Every entit
What are composite attributes? Composite attributes can be separated in to sub parts.
What is Relational calculus? Relational calculus is a Non- Procedural language.
Give an example of operations from the State Actions and Activities. For instance, in bank the activity verify account code and verify password
Which database object does not physically exist? A view database object does not physically exist.
Consider the relations City (city_name, state) Hotel (name, address) City_hotel (hotel_name, city_name, owner) Answer the following queries in relational algebra (i) Find
Explain Clustering file organization (i) Determine if a record of file is physically ordered on a nonkey field - that does not comprise a different value for each record - that
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