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Describe briefly models which define the operations on classes. The three models which are used to define operations on classes are as: Object Model = data dictionary + Obje
Database Administrator One of the main perpose for having the database management system is to have control of both data or programs accessing that data. The person having li
Creating a view: A query can be embedded within the CREATE VIEW STATEMENT A query can have complex select statements containing join, groups and sub- queries A quer
Give the levels of data abstraction? There are three levels of Data Abstraction a) Physical level b) logical level c) view level
In an E-R diagram how attributes are represented ? In an E-R diagram attributes are represented in a ellipse.
Question 1 Explain the concept of Foreign Key. How a foreign key differs from a Primary Key? Can the Foreign Key accept nulls? Question 2 With a necessary example explain (i)
Describe Database state in details? Database state: The actual data within the database at a particular moment in time is known as a database state.
Explain algorithm of ER To Relational Mapping ? ER-to-Relational Mapping Algorithm: 1) Step 1: Mapping of regular entity types: For each strong entity type E, form a relatio
Describe in brief about DBMS ?
composite attribute
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