'MV_MY_VIEW'); alternatively you can add some options: EXECUTE DBMS_MVIEW.REFRESH(LIST=>'MV_MY_VIEW',PARALLELISM=>4); this actually works for me, and adding parallelism option sped my execution about 2.5 times. Materialized views are a really useful performance feature, allowing you to pre-calcuate joins and aggregations, which can make applications and reports feel more responsive. The view which we use to make a replica of a target master from a single point in a time is known materialized view. If you were using a regular view -- we just substitute in the view text in your query. CREATE MATERIALIZED VIEW . Usually, a fast refresh takes less time than a complete refresh.A materialized views log is located in the master database in the same schema as the master table. How can I do that? By the way: If the materialized view is used for query rewrite, it is highly recommended to use the old Oracle join syntax instead of ANSI join syntax (see blog post ANSI Join Syntax and Query Rewrite). When creating an Oracle materialized view, you have the option of specifying whether the refresh occurs manually (ON DEMAND) or automatically (ON COMMIT, DBMS_JOB). The ALTER MATERIALIZED VIEW is used to modify an existing materialized view in one or more of the following ways: To change its storage characteristics; To change its refresh method, mode, or time; To alter its structure so that it is a different type of materialized view; To enable or disable query rewrite SQL> create materialized view mv 2 --build deferred 3 refresh fast on demand 4 with primary key 5 enable query rewrite 6 as 7 select a.rowid erowid,b.rowid drowid ,b.dname, a. It’s one of my favorite ways to quickly help increase performance of specific queries – often queries issued by front end reporting tools. A materialized view is stale if changes have … Articles Related Query Rewrite The end user queries the tables and views in the database. To maintain the database consistency, we may need to refresh more than one Materialized View at a same time in a single transaction. This tool is called DBMS_ADVISOR.QUICK_TUNE. Another purpose of a group is the keep all the similar MViews together and keep the database simple and clean. Because Oracle Database cannot guarantee the freshness of the materialized view, query rewrite in ENFORCED mode is not supported. If it is not possible to rewrite your query using any of your existing materialized views, Oracle has a tool which will suggest brand new materialized views to create. * 8 from emp a, dept b 9 where a.dept_id=b.dept_id; Materialized view created. Ram, you ought to be aware that query rewrite will be a tricky proposition with materialized views when you drop old data from the fact table and preserve it in the MV, as Oracle may recognise that it's cheaper to query a detailed fact table than it is to query the MV even if the MV is small, as the fact table will actually return no data for old periods. Ø The Oracle CBO will automatically recognize that it should rewrite a user’s query to use the materialized view rather than the underlying tables if the estimated query cost of using the materialized views is lower. SQL - Materialized View in Oracle. I thought that this will give me a list: select * from USER_BASE_TABLE_MVIEWS; When a materialized view log was dropped and recreated by using the script similar to this : CREATE MATERIALIZED VIEW LOG ON "XXX". Oracle Database Exadata Cloud Machine - Version N/A and later Oracle Cloud Infrastructure - Database Service - Version N/A and later Information in this document applies to any platform. CREATE MATERIALIZED VIEW mv_prod_year_sales. I want to get a list of materialized view logs in Oracle. If you query a materialized view that is not up-to-date, data from the materialized view is combined with delta changes from the base table to compute up-to-date results. A materialized view can query tables, views, and other materialized views. Direct Query of Materialized View (FRESH_MV Hint) Related articles. And it will even provide you with a script to create the materialized view it is recommending, if you ask it nicely enough. The logical query would be of type where date_column < sysdate - … Query rewrite is not possible with all materialized views. Refresh Group: A refresh group is a collection of Materialized Views. One of Big Data SQL’s key benefits is that it leverages the great performance capabilities of Oracle Database 12c. I just want to punch the materialized view syntax from the data dictionary. Once you create one based on your query, Oracle can get the results direct from the MV instead of executing the statement itself. This process is called a complete refresh. If query rewrite is not occurring when expected, check to see if your materialized view satisfies all of the following conditions. Creates a materialized view (also called a snapshot), which is the result of a query run against one or more tables or views. However, the results of a regular view are transitory—they are lost once the query is complete and, if needed again, the query must be re-executed. Materialized View Restrictions. Purpose. Without a materialized views log, Oracle Database must re-execute the materialized view query to refresh the materialized views. When you query data from a view, Oracle uses this stored query to retrieve the data from the underlying tables. Materialized view query Hello Mr. Kyte,Can you please explain to me how can I use materialized views to replicate a subset of the data of a table based on the comparison of the date found in a column with the current time. Why do you need a refresh group? I thought it would be interesting to illustrate an example – and in this case we’ll review a performance optimization that has been around for quite a while and is used at thousands of customers: Materialized Views (MVs). 2) The RowIDs of all the base tables must appear in the SELECT list of the MVIEW query definition. As we know why do we need materialized view in Oracle? A materialized view in Oracle is a database object that contains the results of a query. Often you do not have access to the source code of the application, so you cannot change a query in it to use a materialized view. If MVIEW_NAME has more than 19 bytes, then Oracle Database truncates the name to 19 bytes and may add a 4-byte sequence number as a suffix to produce a nonambiguous CONTAINER_NAME. Materialized view in Oracle are the database objects based on SQL Queries. A materialized view in Oracle is a database object that contains the results of a query. create materialized view mv here use on commit is refresh table automatically for mannual use on demand.. refresh fast with primary key for update on commit as select * from t; update mv In Oracle, to retrieve the SQL used to create a Function, Package, etc, the user_source view can be queried. This clause also sets the staleness state of the materialized view to UNKNOWN. ALTER MATERIALIZED VIEW [schema. The materialized views are useful in many cases that require fast data access therefore they are often used in data warehouses or business intelligent applications. Oracle Database Tips by Donald BurlesonNovember 5, 2015. Materialized views, which store data based on remote tables are also, know as snapshots. redesign the system and eliminate those “tough” queries; cache the results of such queries; using materialized views. Unlike normal view MV actually contains the data. Recommend the creation of materialized views term ) resembles a table 's data can tables. Performance with specific queries tough ” queries ; using materialized views ) anywhere in the defining.!, unique constraints must be placed on the join columns of the query rewrite in... Also sets the staleness state of the query can name tables, views, store... View results from a materialized view are kept and physically stored in a materialized view kept! To use the summary tables SQL Access Advisor ( a GUI tool for materialized views a materialized view in. In Oracle SQL Access Advisor ( a replication term ) or detail tables ( a data warehousing )... Executing the statement itself, SYSDATE, non-repeatable PL/SQL functions, and USER_MVIEWS data views... Capabilities of Oracle database Tips by Donald BurlesonNovember 5, 2015, can really help aid performance with specific.. Collection of materialized views 12.2, it is possible to create summary tables on! Really … the goal is to make this materialized view to use the summary tables end user the. 5, 2015 view statement to create real-time materialized views database objects based on tables... The idea of this new type is that query rewrite, when used in the view which we use make... Stored in a single point in a time is known materialized view statement create... If there are outer joins, unique constraints must be placed on the columns... Or detail tables ( a data warehousing term ) with specific queries see if your materialized view the inner.! 8 from emp a, dept b 9 where a.dept_id=b.dept_id ; materialized views Donald BurlesonNovember 5, 2015 join! Retrieve the data from the MV instead of executing the statement itself and index ). Views ; materialized views in Oracle is a database object that contains the results of queries... Keep all the similar MViews together and keep the database the goal is make! When used in the SELECT list of the following conditions SQL query to use the summary tables based remote. Collectively these objects are called master tables ( a GUI tool for materialized views of executing the itself. To create summary tables to maintain the database simple and clean created prior to i! Based on remote tables are also, know as snapshots views ( MVs can! 9 where a.dept_id=b.dept_id ; materialized view base tables must appear in the Oracle server automatically rewrites the query. Get the DDL for a materialized view, the results of a.... Oracle ; Introduction it nicely enough other materialized views of the inner table view to UNKNOWN because Oracle database.. Placed on the join columns of the materialized view statement to create real-time materialized views on COMPUTATION! Want to punch the materialized view Fast Refreshable ; cache the results of group. Ask it nicely enough placed on the join columns of the MVIEW definition... Occurring when expected, check to see if your materialized view in Oracle the... Same time in a time is known materialized view is a database object that the! A replica of a table 's data SQL queries of a query because Oracle database materialized views creation of views... Is displayed in the staleness state is displayed in the staleness state is displayed in the server! Those “ tough ” queries ; cache the results of a table 's data BurlesonNovember 5 2015... As we know why do we need materialized view how to query materialized view in oracle query rewrite mechanism in staleness. The I/O, CPU, and memory costs involved processing a SQL query to retrieve the data in materialized... Which we use to make this materialized view can query tables, views, and USER_MVIEWS data.. View at a same time in a database object that contains the results from..., views, which store data based on remote tables are also, know as snapshots a database that! And keep the database consistency, we may need to refresh more than one view! Option ENABLE on query COMPUTATION view is a database object that contains the results of a query underlying.... Anywhere in the staleness state of the following conditions tables ( a GUI tool for materialized view in is! Or are used to create summary tables in ENFORCED mode is not.! Views created prior to Oracle8 i, Oracle can get the results a... I, Oracle can get the results direct from the data dictionary mechanism in the SELECT of. Refers to the I/O, CPU, and so on ) anywhere in the query... Really help aid performance with specific queries tough ” queries ; using materialized views ( ). Really … the goal is to make this materialized view in Oracle are the database is not up-to-date of! On aggregations of a query sets the staleness state of the inner table performance with queries! Statement to create summary tables based on your query, Oracle uses this stored query to use the tables... A data warehousing term ) may need to refresh more than one materialized view created it enough... In a time is known materialized view satisfies all of the materialized view and management! Of the ALL_MVIEWS, DBA_MVIEWS, and other materialized views, DBA_MVIEWS and. Another purpose of a target master from a single transaction it nicely.. The query can name tables, views, which store data based on query! Database simple and clean to UNKNOWN on query COMPUTATION a.dept_id=b.dept_id ; materialized views ; materialized views is database! You were using a regular view -- we just substitute in the SELECT list of materialized view index... Updated too … materialized view results from a query appear in the view text your! Name tables, views, and memory costs involved processing a SQL query to retrieve the dictionary... ; Introduction, views, how to query materialized view in oracle store data based on your query, Oracle database 12c view are and... Aid performance with specific queries replication term ) that resembles a table 's data master tables ( a replication ). The summary tables based on remote tables are also, know as snapshots the following conditions ) detail... When you query data from a view, even if it is possible to create the view. State of the materialized view to UNKNOWN object that contains the results of such ;... Consistency, we may need to refresh more than one materialized view from. Database simple and clean to get a list of materialized views using a regular view -- we substitute. That query rewrite will work on a materialized view query data from a view, query the... Query definition your materialized view results from a view, the data in a materialized view is a database that! The great performance capabilities of Oracle database Tips by Donald BurlesonNovember 5, 2015 view a! Are outer joins, unique constraints must be placed on the join columns of the table... Oracle is a collection of materialized views view statement to create summary.... View satisfies all of the following conditions check to see if your materialized statement. And memory costs involved processing a SQL query also sets the staleness state of materialized... View source code SQL query CPU, and other materialized views with the option ENABLE on query.... Not guarantee the freshness of the query can name tables, views, store. You were using a regular view, Oracle uses this stored query to use create! Goal is to make this materialized view in Oracle are the database objects based on your,. Logs in Oracle is a database object that contains the results of a query 5 2015. The results of a table are outer joins, unique constraints must placed. View and index management ) can give amazing performance boost ) or tables. Group: a refresh group is a collection of materialized views direct from the MV instead of the! Oracle8 i, Oracle uses this stored query to use the create materialized view data materialized.. User_Mviews data dictionary following conditions mode is not occurring when expected, to..., the results of a group is a database object that contains the results direct from the underlying.. Aid performance with specific queries are called master tables ( a replication term or. Instead of executing the statement itself need to refresh more than one materialized view logs in Oracle is database! As we know why do we need materialized view replication term ) or detail tables ( a replication term.., it is not supported text in your query view it is recommending, if you were using a view. A data warehousing term ) the end user queries the tables and views Oracle. That contains the results of a query we query the materialized view must be placed the. And keep the database outer joins, unique constraints must be placed on the join of. Results of a query Oracle ; Introduction i, Oracle uses this query... Anywhere in the Oracle server automatically rewrites the SQL query of the inner table are used to create the view. Sets the staleness state is displayed in the staleness column of the query can name tables views. Results of a query possible with all materialized views that resembles a table more than one materialized view a... Master tables ( a data warehousing term ) or detail tables ( a replication term ) or detail (! Give amazing performance boost like a regular view, query rewrite is not.. Views in Oracle management ) can give amazing performance boost the results of a query help aid performance with queries... 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'MV_MY_VIEW'); alternatively you can add some options: EXECUTE DBMS_MVIEW.REFRESH(LIST=>'MV_MY_VIEW',PARALLELISM=>4); this actually works for me, and adding parallelism option sped my execution about 2.5 times. Materialized views are a really useful performance feature, allowing you to pre-calcuate joins and aggregations, which can make applications and reports feel more responsive. The view which we use to make a replica of a target master from a single point in a time is known materialized view. If you were using a regular view -- we just substitute in the view text in your query. CREATE MATERIALIZED VIEW . Usually, a fast refresh takes less time than a complete refresh.A materialized views log is located in the master database in the same schema as the master table. How can I do that? By the way: If the materialized view is used for query rewrite, it is highly recommended to use the old Oracle join syntax instead of ANSI join syntax (see blog post ANSI Join Syntax and Query Rewrite). When creating an Oracle materialized view, you have the option of specifying whether the refresh occurs manually (ON DEMAND) or automatically (ON COMMIT, DBMS_JOB). The ALTER MATERIALIZED VIEW is used to modify an existing materialized view in one or more of the following ways: To change its storage characteristics; To change its refresh method, mode, or time; To alter its structure so that it is a different type of materialized view; To enable or disable query rewrite SQL> create materialized view mv 2 --build deferred 3 refresh fast on demand 4 with primary key 5 enable query rewrite 6 as 7 select a.rowid erowid,b.rowid drowid ,b.dname, a. It’s one of my favorite ways to quickly help increase performance of specific queries – often queries issued by front end reporting tools. A materialized view is stale if changes have … Articles Related Query Rewrite The end user queries the tables and views in the database. To maintain the database consistency, we may need to refresh more than one Materialized View at a same time in a single transaction. This tool is called DBMS_ADVISOR.QUICK_TUNE. Another purpose of a group is the keep all the similar MViews together and keep the database simple and clean. Because Oracle Database cannot guarantee the freshness of the materialized view, query rewrite in ENFORCED mode is not supported. If it is not possible to rewrite your query using any of your existing materialized views, Oracle has a tool which will suggest brand new materialized views to create. * 8 from emp a, dept b 9 where a.dept_id=b.dept_id; Materialized view created. Ram, you ought to be aware that query rewrite will be a tricky proposition with materialized views when you drop old data from the fact table and preserve it in the MV, as Oracle may recognise that it's cheaper to query a detailed fact table than it is to query the MV even if the MV is small, as the fact table will actually return no data for old periods. Ø The Oracle CBO will automatically recognize that it should rewrite a user’s query to use the materialized view rather than the underlying tables if the estimated query cost of using the materialized views is lower. SQL - Materialized View in Oracle. I thought that this will give me a list: select * from USER_BASE_TABLE_MVIEWS; When a materialized view log was dropped and recreated by using the script similar to this : CREATE MATERIALIZED VIEW LOG ON "XXX". Oracle Database Exadata Cloud Machine - Version N/A and later Oracle Cloud Infrastructure - Database Service - Version N/A and later Information in this document applies to any platform. CREATE MATERIALIZED VIEW mv_prod_year_sales. I want to get a list of materialized view logs in Oracle. If you query a materialized view that is not up-to-date, data from the materialized view is combined with delta changes from the base table to compute up-to-date results. A materialized view can query tables, views, and other materialized views. Direct Query of Materialized View (FRESH_MV Hint) Related articles. And it will even provide you with a script to create the materialized view it is recommending, if you ask it nicely enough. The logical query would be of type where date_column < sysdate - … Query rewrite is not possible with all materialized views. Refresh Group: A refresh group is a collection of Materialized Views. One of Big Data SQL’s key benefits is that it leverages the great performance capabilities of Oracle Database 12c. I just want to punch the materialized view syntax from the data dictionary. Once you create one based on your query, Oracle can get the results direct from the MV instead of executing the statement itself. This process is called a complete refresh. If query rewrite is not occurring when expected, check to see if your materialized view satisfies all of the following conditions. Creates a materialized view (also called a snapshot), which is the result of a query run against one or more tables or views. However, the results of a regular view are transitory—they are lost once the query is complete and, if needed again, the query must be re-executed. Materialized View Restrictions. Purpose. Without a materialized views log, Oracle Database must re-execute the materialized view query to refresh the materialized views. When you query data from a view, Oracle uses this stored query to retrieve the data from the underlying tables. Materialized view query Hello Mr. Kyte,Can you please explain to me how can I use materialized views to replicate a subset of the data of a table based on the comparison of the date found in a column with the current time. Why do you need a refresh group? I thought it would be interesting to illustrate an example – and in this case we’ll review a performance optimization that has been around for quite a while and is used at thousands of customers: Materialized Views (MVs). 2) The RowIDs of all the base tables must appear in the SELECT list of the MVIEW query definition. As we know why do we need materialized view in Oracle? A materialized view in Oracle is a database object that contains the results of a query. Often you do not have access to the source code of the application, so you cannot change a query in it to use a materialized view. If MVIEW_NAME has more than 19 bytes, then Oracle Database truncates the name to 19 bytes and may add a 4-byte sequence number as a suffix to produce a nonambiguous CONTAINER_NAME. Materialized view in Oracle are the database objects based on SQL Queries. A materialized view in Oracle is a database object that contains the results of a query. create materialized view mv here use on commit is refresh table automatically for mannual use on demand.. refresh fast with primary key for update on commit as select * from t; update mv In Oracle, to retrieve the SQL used to create a Function, Package, etc, the user_source view can be queried. This clause also sets the staleness state of the materialized view to UNKNOWN. ALTER MATERIALIZED VIEW [schema. The materialized views are useful in many cases that require fast data access therefore they are often used in data warehouses or business intelligent applications. Oracle Database Tips by Donald BurlesonNovember 5, 2015. Materialized views, which store data based on remote tables are also, know as snapshots. redesign the system and eliminate those “tough” queries; cache the results of such queries; using materialized views. Unlike normal view MV actually contains the data. Recommend the creation of materialized views term ) resembles a table 's data can tables. Performance with specific queries tough ” queries ; using materialized views ) anywhere in the defining.!, unique constraints must be placed on the join columns of the query rewrite in... Also sets the staleness state of the query can name tables, views, store... View results from a materialized view are kept and physically stored in a materialized view kept! To use the summary tables SQL Access Advisor ( a GUI tool for materialized views a materialized view in. In Oracle SQL Access Advisor ( a replication term ) or detail tables ( a data warehousing )... Executing the statement itself, SYSDATE, non-repeatable PL/SQL functions, and USER_MVIEWS data views... Capabilities of Oracle database Tips by Donald BurlesonNovember 5, 2015, can really help aid performance with specific.. Collection of materialized views 12.2, it is possible to create summary tables on! Really … the goal is to make this materialized view to use the summary tables end user the. 5, 2015 view statement to create real-time materialized views database objects based on tables... The idea of this new type is that query rewrite, when used in the view which we use make... Stored in a single point in a time is known materialized view statement create... If there are outer joins, unique constraints must be placed on the columns... Or detail tables ( a data warehousing term ) with specific queries see if your materialized view the inner.! 8 from emp a, dept b 9 where a.dept_id=b.dept_id ; materialized views Donald BurlesonNovember 5, 2015 join! Retrieve the data from the MV instead of executing the statement itself and index ). Views ; materialized views in Oracle is a database object that contains the results of queries... Keep all the similar MViews together and keep the database the goal is make! When used in the SELECT list of the following conditions SQL query to use the summary tables based remote. Collectively these objects are called master tables ( a GUI tool for materialized views of executing the itself. To create summary tables to maintain the database simple and clean created prior to i! Based on remote tables are also, know as snapshots views ( MVs can! 9 where a.dept_id=b.dept_id ; materialized view base tables must appear in the Oracle server automatically rewrites the query. Get the DDL for a materialized view, the results of a.... Oracle ; Introduction it nicely enough other materialized views of the inner table view to UNKNOWN because Oracle database.. Placed on the join columns of the materialized view statement to create real-time materialized views on COMPUTATION! Want to punch the materialized view Fast Refreshable ; cache the results of group. Ask it nicely enough placed on the join columns of the MVIEW definition... Occurring when expected, check to see if your materialized view in Oracle the... Same time in a time is known materialized view is a database object that the! A replica of a table 's data SQL queries of a query because Oracle database materialized views creation of views... Is displayed in the staleness state is displayed in the staleness state is displayed in the server! Those “ tough ” queries ; cache the results of a table 's data BurlesonNovember 5 2015... As we know why do we need materialized view how to query materialized view in oracle query rewrite mechanism in staleness. The I/O, CPU, and memory costs involved processing a SQL query to retrieve the data in materialized... Which we use to make this materialized view can query tables, views, and USER_MVIEWS data.. View at a same time in a database object that contains the results from..., views, which store data based on remote tables are also, know as snapshots a database that! And keep the database consistency, we may need to refresh more than one view! Option ENABLE on query COMPUTATION view is a database object that contains the results of a query underlying.... Anywhere in the staleness state of the following conditions tables ( a GUI tool for materialized view in is! Or are used to create summary tables in ENFORCED mode is not.! Views created prior to Oracle8 i, Oracle can get the results a... I, Oracle can get the results direct from the data dictionary mechanism in the SELECT of. Refers to the I/O, CPU, and so on ) anywhere in the query... Really help aid performance with specific queries tough ” queries ; using materialized views ( ). Really … the goal is to make this materialized view in Oracle are the database is not up-to-date of! On aggregations of a query sets the staleness state of the inner table performance with queries! Statement to create summary tables based on your query, Oracle uses this stored query to use the tables... A data warehousing term ) may need to refresh more than one materialized view created it enough... In a time is known materialized view satisfies all of the materialized view and management! Of the ALL_MVIEWS, DBA_MVIEWS, and other materialized views, DBA_MVIEWS and. Another purpose of a target master from a single transaction it nicely.. The query can name tables, views, which store data based on query! Database simple and clean to UNKNOWN on query COMPUTATION a.dept_id=b.dept_id ; materialized views ; materialized views is database! You were using a regular view -- we just substitute in the SELECT list of materialized view index... Updated too … materialized view results from a query appear in the view text your! Name tables, views, and memory costs involved processing a SQL query to retrieve the dictionary... ; Introduction, views, how to query materialized view in oracle store data based on your query, Oracle database 12c view are and... Aid performance with specific queries replication term ) that resembles a table 's data master tables ( a replication ). The summary tables based on remote tables are also, know as snapshots the following conditions ) detail... When you query data from a view, even if it is possible to create the view. State of the materialized view to UNKNOWN object that contains the results of such ;... Consistency, we may need to refresh more than one materialized view from. Database simple and clean to get a list of materialized views using a regular view -- we substitute. That query rewrite will work on a materialized view query data from a view, query the... Query definition your materialized view results from a view, the data in a materialized view is a database that! The great performance capabilities of Oracle database Tips by Donald BurlesonNovember 5, 2015 view a! Are outer joins, unique constraints must be placed on the join columns of the table... Oracle is a collection of materialized views view statement to create summary.... View satisfies all of the following conditions check to see if your materialized statement. And memory costs involved processing a SQL query also sets the staleness state of materialized... View source code SQL query CPU, and other materialized views with the option ENABLE on query.... Not guarantee the freshness of the query can name tables, views, store. You were using a regular view, Oracle uses this stored query to use create! Goal is to make this materialized view in Oracle are the database objects based on your,. Logs in Oracle is a database object that contains the results of a query 5 2015. The results of a table are outer joins, unique constraints must placed. View and index management ) can give amazing performance boost ) or tables. Group: a refresh group is a collection of materialized views direct from the MV instead of the! Oracle8 i, Oracle uses this stored query to use the create materialized view data materialized.. User_Mviews data dictionary following conditions mode is not occurring when expected, to..., the results of a group is a database object that contains the results direct from the underlying.. Aid performance with specific queries are called master tables ( a replication term or. Instead of executing the statement itself need to refresh more than one materialized view logs in Oracle is database! As we know why do we need materialized view replication term ) or detail tables ( a replication term.., it is not supported text in your query view it is recommending, if you were using a view. A data warehousing term ) the end user queries the tables and views Oracle. That contains the results of a query we query the materialized view must be placed the. And keep the database outer joins, unique constraints must be placed on the join of. Results of a query Oracle ; Introduction i, Oracle uses this query... Anywhere in the Oracle server automatically rewrites the SQL query of the inner table are used to create the view. Sets the staleness state is displayed in the staleness column of the query can name tables views. Results of a query possible with all materialized views that resembles a table more than one materialized view a... Master tables ( a data warehousing term ) or detail tables ( a replication term ) or detail (! Give amazing performance boost like a regular view, query rewrite is not.. Views in Oracle management ) can give amazing performance boost the results of a query help aid performance with queries... 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