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What are the different approaches for database design?
There are two basic approaches for database design which are as follows:
Attribute driven: It compiles a list of attributes relevant to application, and normalizes the groups of attributes which preserve functional dependencies. Entity driven: It discovers entities which are meaningful to application, and describe them.
Explain the Management of Data Store Every system irrespective of its nature of application requires storing permanent data for consequent use in problem solving. Some objects
Write the syntax of creating an INDEX ? Syntax of Creating an Index: CREATE [BITMAP] [UNIQUE] INDEX ON ( [, ] . . .);
What is primary Key Explain? Primary Key - Primary key is one of the candidate keys. It should be selected such in which its attribute values are never, or very rarely, chang
Which database object does not physically exist? A view database object does not physically exist.
What is called query processing? Query processing refers to the range of activities included in extracting data from a database.
Define various ways in which SELECT statement can be used for record selection Technology? SELECT gives you control over a number of aspects for record retrieval: 1) Which
Law Associates is a large legal practice based in Sydney. You have been asked to design a data model for the practice based upon the following specification: The practice emplo
What is called as an N-way merge? The merge operation is a generalization of the two-way merge used by the standard in-memory sort-merge algorithm. It merges N runs, so it is k
Differentiate sub-class and super-class? The specialization of a class is known as subclasses.eg: employee is a subclass of person and teller is a subclass of employee. Convers
What are the basic objects of the data dictionary? Tables Domains Data elements Structures Foreign Keys
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