Views are logical tables that display required information from other tables without storing data themselves. They are created using SELECT statements and show records from the referenced table based on the column names. There are two main types of views: simple views which use a basic SELECT statement with a WHERE clause, and complex views which can include functions like GROUP BY, ORDER BY, and JOINs. Views are created with the CREATE VIEW statement and SELECT statements can then be used to query the view like a table.

1. VIEWS:
1. View is a logical table used to display the required information from the table. View will be
created by using the select statement
2. View will not store values and will not use memory
3. With the help of column names existing in it. It will show the records from the table
4. View will not have only data of its own the values it will display from the table.
TYPES OF VIEWS:
SIMPLE VIEW:
It is created with select statement with where condition
Complex view:
It is created with select statement containing GROUPBY,ORDERBY and by using JOINS.
SYNTAX:
CREATE VIEW<VIEW_NAME>
AS
SELECT STATEMENT
EX:
CREATE VIEW MYVIEW1
AS
SELECT * FROM EMPLIST WHERE JOB=’MANAGER’
SELECT * FROM MYVIEW1
TO SEE VIEWS IN CURRENT DATABASE
SELECT * FROM MYSYSOBJECTS
WHERE X TYPE=’V’
TO INSERT VALUES:
INSERT MYVIEW1 VALUES(1001,’RAJESH’,’MANAGER’,NULL,’13-SEP-2010’,38000,NULL,0)
UPDATE MYVIEW1:

2. SET NAME=’NARESH’ WHERE ENO=104
TO DELETE VIEW:
SYNATAX:
DROP VIEW <VIEW_NAME>
EX:
DROP VIEW MYVIEW1
DELETE MYVIEW1 WHERE ENO=1001