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Lesson 9

Oracle Materialized Views Conclusion

Materialized views are a truly powerful feature of Oracle. Although materialized views are applicable only to certain usage scenarios, they can provide a real performance boost for specific situations without having to change any of the applications that are relying on your Oracle database.
In this module, you learned how to:
  1. Describe a materialized view and its uses
  2. Describe the parameters and what they mean in the CREATE MATERIALIZED VIEW command
  3. Write SQL to create a materialized view that stores summary data
  4. Describe the conditions and types of indexing for materialized views
  5. Check the status of a materialized view and fix it
  6. Descibe what conditions allow for query rewriting
  7. Describe the function of the DBMS_OLAP and DBMS_MVIEW packages

If you are using Oracle for a data warehouse or remote or distributed applications, materialized views may give you a performance gain with a minimum of effort.

Glossary

The following terms were defined in this module:
  1. Bitmapped Index: Uses individual bits in an index entry to identify the value of an entry. A bitmapped index works best when there are a limited number of values for an index.
  2. Data Warehouse: A type of database that is used for analysis of data. The data warehouse frequently has a different type of structure a star schema as opposed to a standard normalized schema and is also frequently separate from an organization's transaction database.
  3. ROWID: An internal value that uniquely identifies each individual row in an Oracle database.
In the next module, you will learn about index enhancements in Oracle.

Materialized Views - Quiz

Click the Quiz link below to test your understanding of the concepts presented in this module.
Materialized Views - Quiz