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What are the several forms of identity?
a) Value
b) Name
c) Built-in
Logical Operators Rules of Precedence: Order evaluated Operator 1 All comparison operators 2
What is the use of Union and intersection operation? Union: The result of this operation contains all tuples that are either in r1 or in r2 or in both r1 and r2.Duplicate tuple
Consider the table student and list names of students in the departments other than maths and computer. SELECT std_name FRM student WHERE dept_name NOT IN (‘Maths','Computer);
Which method of access uses key transformation? A Hash method of access uses key transformation.
Explain cursors in SQL? Cursors in SQL - An object used to store the output of a query for row-through-row processing through the application programs. Cursors are constructs
What are the two types of indices? The two types of indices are:- A) Dense index B) Sparse index
Write short notes on extension and intension? In any data model, it is significant to distinguish among the description of the database and the database itself the description
i need help with creating database system for a library
imagery
What is the used of specifying alias? Specifying alias: is used to rename column or attribute in a table.
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