View is a database object also called a logical table. it has no psychical existence. It is not like a simple table, but is a virtual or logical table which contains columns and data from different tables (may be one or more tables). A View does not contain any data, it is a set of queries that are applied to one or more tables that is stored within the database as an object. After creating a view from some table(s), it used as a reference of those tables and when executed, it shows only those data which are already mentioned in the query during the creation of the View. Creating view Syntax: ------------------------------------------------- CREATE VIEW [View_Name] AS [ SELECT Statement] ------------------------------------ ------------- CREATE VIEW SampleView As SELECT EmpID, EmpName FROM EmpInfo -------------------------------------------------- Data retrieve from view: SELECT * FROM SampleView WHERE EmpID ='FN0009C1' View does not modif
Comments
Post a Comment