what is Materialized Views?
- 2 Answers
- 7645 Views
- Syntel, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / rameshbabu.katikireddy
In literature on data warehousing are created in Oracle using a schema object called a materialized view. Materialized views can be used to perform a number of roles, such as improving query performance or providing replicated data, as described below.
In data warehouses, materialized views can be used to recompute and store aggregated data such as sum of sales. Materialized views in these environments are typically referred to as summaries since they store summarized data. They can also be used to recompute joins with or without aggregations. So a materialized view is used to eliminate overhead associated with expensive joins or aggregations for a large or important class of queries.
Posted by
Rameshbabu.katikireddy
Time:jan.11.2012,6:20pm
Contact09767696346
Karimnagar
| Is This Answer Correct ? | 3 Yes | 1 No |
Answer / vr
A materialized view is a database object that contains the results of a query. For example, it may be a local copy of data located remotely, or may be a subset of the rows and/or columns of a table or join result, or may be a summary based on aggregations of a table's data.
| Is This Answer Correct ? | 0 Yes | 0 No |
Define Data Warehousing?
Explain the versions of reportnet?
What are the advantages and disadvantages of using stored procedures versus calling sql inline in cold fusion?
How can you set the session management?
how can one connect two fact tables ? is it possible ? how?
Explain what is a three tier data warehouse?
what are the types of dimension tables
Explain what are the different types of join operations?
State any 5 of Cods guidelines of an OLAP system, brief description each?
Difference between slicing and dicing with example?
What is conformed dimension?
What is difference between query studio and report studio?
Teradata 
