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Object and Set Operations - (BCA / B.Tech)

Object and Set Operations in RDBMS:

Object and Set Operations play important roles in databases and programming, providing different ways to organize and process data.

Object Operations (from Object-Oriented Programming):

These operations relate to objects, which are instances of classes that bundle data and methods.

Instantiation: The process of creating an object from a class.
Method Invocation: Calling a method (function) on an object to perform an action.
Attribute Access: Reading or setting the properties (attributes) of an object.

Set Operations (in SQL):

These operations are used to combine the results of two or more SELECT statements.

UNION: Combines the result sets of two or more SELECT statements and returns distinct rows.
INTERSECT: Returns only the rows that appear in both result sets.
EXCEPT (or MINUS): Returns the rows from the first query that are not present in the second query.

Object and Set Operations

Object and Set Operations in RDBMS:

In this Chapter