Interested to Buy Any Domain ? << Click Here >> for more details...
What is the difference between view and materialised view?
- 4 Answers
- 13028 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / sindhu
View - store the SQL statement in the database and let you
use it as a table. Every time you access the view, the SQL
statement executes.
Materialized view - stores the results of the SQL in table
form in the database. SQL statement only executes once and
after that every time you run the query, the stored result
set is used. Pros include quick query results
| Is This Answer Correct ? | 14 Yes | 0 No |
Answer / anju
materialized view can be used to precalculate the expensive
joins and aggregates prior to execution and the result is
stored in a table in database and can refer to it in
future. the adv of this is increse in performance.
view is nothing but an sql query stored. it will not store
data in tables
| Is This Answer Correct ? | 5 Yes | 0 No |
Answer / atiric sofrware(raja)
Views contains query whenever execute views it has read from
base table
Where as Materialised views loading or replicated takes
place only once which gives you better query performance
Refresh materialised views
1.on commit
2. on demand
(Complete, never, fast, force)
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / praveen kumar pendekanti
In view if we do any operation that may be changes in table
and viveversa.View dont have memery allocation.if we create
a view as 'v1' on emp table and then we delete the emp
table there by 'v1' name will be exist in view list, but
data will not be there, if we create the emp table once
again it will automatically link to that 'v1'view.
But in the case of M.views the changes that made in table
cannot be seen in M.view.M.views have separate memery
allocation if we delete the table the M.view will be there.
M.view is read only view,D.D.L oerations are not possible
on this M.view. M.view are used in dataware housing.
| Is This Answer Correct ? | 1 Yes | 0 No |
How do you use reject loader.
Have you worked with/created Parameter file
write sql query following source table jan feb mar apr 100 200 300 400 500 600 700 800 900 100 200 300 i want the output format like month total jan 1500 feb 900 mar 1200 apr 1500
What is the grain level in DWH? If i have year to day. what is the grain level of DWH from year to day.
Differnce between filter and router?
can you avoid static cache in the lookup transformation? I mean can you
Flat file heaving 1 lack records and I want to push 52000 records to the target?
What are Business Components in Informatica?
what is semi-additive fact?where did u used?
What happens when a session fails and you click on recover?
write a query for how to eliminate the duplicate rows without using distinct?
WHAT IS EDM?WHAT IS THE USE IN INFORMATICA? chandumba2005@gmai.com
Teradata 
