Issue with Views

Question

Hi All,
I have created a view as follows.
create or replace view V1 as
select * from empI have base table EMP. Every day this table would be updated with millions of data. so by the end of the day if I give select * from emp this table contains more than 3 millions of records. daily more than 3 million records get added.
so I want to create a materialized view whcih will refresh the data by the scheduing time every day by the end of the day.
if table got updated then View also should be updated. For the above mentioned requiremnt I want to create Materialized view. can any one please throw your view for this.
Please let me know if you need more information.
Thank you,
SNN

Answer 1

Given that your posted view is simply a select * from table, I see no possible use for a Mat view here. A regular view is simply a stored sql statement, and it is run everytime someone queries the view. A regular view does not "store" data anywhere.
SQL> CREATE TABLE t (id NUMBER, descr VARCHAR2(10));
Table created.
SQL> CREATE VIEW v AS SELECT * FROM t;
View created.
SQL> INSERT INTO t VALUES (1, 'One');
1 row created.
SQL> SELECT * FROM v;
        ID DESCR
         1 OneAny MV you created based on the sql you posted would simply be a copy of the table as it existed the last time the MV was updated.
John