Interested to Buy Any Domain ? << Click Here >> for more details...
How Materialized Views are linked with Oracle DataWare
house?
- 1 Answers
- 6569 Views
- Kirloskar, I also Faced
- E-Mail Answers
Answer / satya
Materialized views are schema objects that can be used to
summarize, precompute, replicate, and distribute data. E.g.
to construct a data warehouse.
A materialized view provides indirect access to table data
by storing the results of a query in a separate schema
object. Unlike an ordinary view, which does not take up any
storage space or contain any data.
The existence of a materialized view is transparent to SQL,
but when used for query rewrites will improve the
performance of SQL execution. An updatable materialized view
lets you insert, update, and delete.
You can define a materialized view on a base table,
partitioned table or view and you can define indexes on a
materialized view.
A materialized view can be stored in the same database as
its base table(s) or in a different database.
Materialized views stored in the same database as their base
tables can improve query performance through query rewrites.
Query rewrites are particularly useful in a data warehouse
environment.
| Is This Answer Correct ? | 9 Yes | 0 No |
What is Grain & Granularity in Data Warehouse.
difference between bo 6.5 and bo xi r2
What is critical column?
What is execution plan?
What is the function of etl when used in data warehousing?
how much memory space occupied real time project (roughly)?
Explain clearly how to explain any (sales) project in interview. Actually feom where report developer work starts?pls reply as soon as possible?
What is an error log table in informatica occurs and how to maintain it in mapping?
What are data modeling and data mining? Where it will be used?
Tell me what is full load & incremental or refresh load?
What is dimension modeling?
What is an OLTP (Online Transaction Processing) System?
Teradata 
