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Object-based Models: Use objects as key data representation components.
Examples:-
explain three types of internet risks to the consummers whent he business system is data dependent. how can we minimise these risks
What is the used of specifying alias? Specifying alias: is used to rename column or attribute in a table.
Chapter 10a review questions
ALTER TABLE Command : This command is used for variation of existing structure of the table in the given situation: When a new column is to be added to the table structure.
Question: Using the data model express the following queries in SQL. (a) Create the Table named "Cinema" and make the cinema_code to be the primary key of the relation and
Compute the closure (F+) for the following set of the functional dependencies defined on R(a,b,c,d), where F - {c→ a, ab → d, a → b, d → c}, i.e. what are all of the FDs implied b
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
What are stored and derived attributes? Stored attributes: The attributes keeps in a data base are known as stored attributes. Derived attributes: The attributes that are de
what is view?explain
What is conceptual schema? The schemas at the view level are known as subschema that describe dissimilar views of the database.
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