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What is conceptual schema?
The schemas at the view level are known as subschema that describe dissimilar views of the database.
The External or View Level The external or view level is the highest level of abstraction of database. It gives a window on the conceptual view, which permits the user to see
WHAT IS DATABASE TECHNOLOGIES
Discuss how the bi-directional Implementations are made. In bi-directional implementation of the association, a pair of references must implement every link. The declarations a
Describe the GRANT function and explain, how it associates to security. What kind of privileges may be granted? How are they revoked? Ans: Since more than one user can aacce
Define Database layer? The database layer defines the data formats used in the database.
What is object containment? References among objects can be used to model dissimilar real-world concepts.
Fundamentals of Database Management 1. Explain the concept of Foreign Key. How a foreign key differs from a Primary Key? Can the Foreign Key accept nulls? 2. With a necess
How to create values of structured type? Constructor functions are used to make values of structured types. A function with the similar name as a structured type is a construct
does tables are called relations
Write short notes on relational model The relational model uses a collection of tables to show both data and the relationships between those data. The relational model is an ex
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