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Q.1 Briefly discuss the different layers of ANSI SPARC architecture.
Ans: The three layers of ANSI SPARC architecture are like this:
1. Internal view is at the lowest level of abstraction, closest to the physical storage method employed. It points out how the data will be stored and explains the data structures and access methods to be employed by the database. There is one internal view for the whole database.
2. Global or Conceptual View: At this level of abstraction all the database entities and the relationships between them are included. There is one conceptual view for the whole database.
3. External or User View: The external or user view is at the highest level of database abstraction in which just only those portions of the database concern to a user or application programme are involved. Some external or user views may exist for a specified global or conceptual view.
Explain Interfaces for parametric Users? Interfaces for Parametric Users - Parametric users, such as bank tellers, frequent have a little set of operations in which they must p
Briefly describe the different kinds of users of a DBMS. Ans: Different sorts of DBMS users are: (a) Software Engineers: These are the people accountable for developing ap
The State of NewYork certifies firefighters throughout state and keep track all of them, as well as of the state’s fire departments. Each fire department has unique department numb
What is Structured Query Langauge (SQL)? SQL is a powerful set-oriented language which was formed by IBM research for the databases that adhere to the relational model. It havi
What is OLAP? OnLine Analytical Processing (OLAP) is a Business Intelligence (BI) reporting system. OLAP gives the user with the capability to sum, count, average and do other
Example : Create a sequence named SEQSS that starts at 105, has a step of 1 and can take maximum value as 2000. CREATE SEQUENCE SEQSS START WITH 105 INCREMENT BY 1 MAX VA
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Consider the subsequent relations for a database which keeps track of business trips of salespersons in a sales office: SALESPERSON (SSN, Name, start_year, Dept_no) TRIP (SSN, Fr
Q. Explain data aggregatio n and discuss different design constraints. Sol. Aggregation One limitation of the E-R model is that it cannot express relationships amon
Funky Festivals Specification Funky Festivals organise music festivals which take place at various venues throughout the UK. A venue needs to be booked before a Festival can t
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