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Define the categories of SQL Statements?
1) Statements that don't return a result set. This statement class includes
INSERT, DELETE, and UPDATE.
2)Statements that return a result set such as SELECT, SHOW, EXPLAIN, and
DESCRIBE.
Which operation is used if we are interested in only certain columns of a table? PROJECTION operation is used if we are interested in only certain columns of a table.
Write an sql statement to find what is the percentage of home policies which are from the state of Arizona out of all Home policies by Policy Value.
wh
What is a view? How it is related to data independence? A view might be thought of as a virtual table, that is, a table that does not really exist in its own right but is inste
What are the basic objects of the data dictionary? Tables Domains Data elements Structures Foreign Keys
how many types of data model in DBMS? explain data abstraction with its different level
Explain what is DDL? DDL - Data Definition Language: statements used to define the database structure or schema. Some examples: CREATE - to create objects in the database ALT
Explain the disadvantages of a file processing system? Ans: Disadvantages of File Processing Systems include: 1) Data Redundancy 2) Data Inconsistency 3) Difficult to acce
What is the difference among a database schema and a database state? The collection of information stored in database at particular moment in time is known as database state a
Describe the benefits of OOD techniques OOD techniques are very useful for development of large and complex systems. It has been noted that large projects that are developed u
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