what is Materialized view? What is a snapshot? what are the
similarities and differences between Materialized views and
snapshots?
Answers were Sorted based on User's Feedback
Answer / mkumar.it
Snapshots and Materialized view are used interchangibly as
both are almost same. However, materialized view is having
additional feature of query rewrite which is not in snapsot.
In this feature, suppose you made any materialized view
using some aggrigate function and you query base table from
sql using same aggrigate funtion, the query will execute on
the materialized view instead of querying base table
provided you have query rewrite priviledge.
Is This Answer Correct ? | 14 Yes | 2 No |
Answer / its me...
A materialized view is a database object that contains the
results of a query. The FROM clause of the query can name
tables, views, and other materialized views. Collectively
these objects are called master tables .
materialized views allow you to maintain copies of remote
data on your local node.
You can select data from a materialized view as you would
from a table or view.
Is This Answer Correct ? | 5 Yes | 1 No |
How to define default values for formal parameters?
what is grid in Oracle 10g...
What is the data pump import utility?
How to bring a tablespace online?
Can we connect to ORACLE db using Windows Authentication?
Explain oracle’s server parameter file.
How to delete multiple rows from a table in oracle?
What are a query and state the different types of queries and their uses?
What is clustered table in Oracle?
Explain what are the different type of segments?
how to use select statement as formal parameter in procedure specification?(someone said that using string) ex:-procedure(a in number,select ename from emp ) i am asking syntax like this?
what is the scripts in data base?