A virtual table that represents the data in one or more tables in an alternative way.

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6
votes
1answer
1k views

What's the difference between a v$ view and its dba_ equivalent?

What's the general difference between a v$ view and its dba_ equivalent? Take, for example, v$tablespace and dba_tablespaces.
4
votes
3answers
1k views

Optimizing query using view on EAV structure

An application is writing into a database that follows an EAV structure, similar to this: CREATE TABLE item ( id INTEGER PRIMARY KEY, description TEXT ); CREATE TABLE item_attr ( item ...
2
votes
2answers
314 views

Search on part of a column in a SQL Server cross-database view

I'm currently writing an application that interfaces with a 3rd party vendor's SQL Server 2008 database that I only have read access to. We have a separate database that contains cross database views ...
8
votes
1answer
2k views

noexpand hint for non-enterpise edition and performance

I have to use Indexed views to reach performance. As I can see from this comparison table standard edition does not support indexed views. But BOL says: Indexed views can be created in any ...
5
votes
1answer
1k views

Do I need to enumerate the columns used in a materialized view when creating the MV log?

I'm currently creating materialized view logs on a whole bunch of tables in order to support materialized views with FAST REFRESH. The materialized views we're creating contain approx 30 columns from ...
2
votes
1answer
643 views

access all_mview or user_mviews from app code

I need to access the user_mviews or all_mviews table to get meta information about materialized view in my app. Which grants are necessary to read the user_mviews table?
8
votes
2answers
8k views

How do I switch off SCHEMABINDING for a view without recreating it?

How do I switch off SCHEMABINDING for a view without recreating it?
7
votes
1answer
894 views

Materialized views in oracle

How are materialized views implemented in oracle? I've created a materialized view in oracle. What I now see is a quite normal table with a job. Are materialized views translated into tables & ...
7
votes
1answer
3k views

Oracle materialized view refresh schedule

Since I see that it is possible to specify an expression like sysdate + 1, here are my questions: Is it possible to specify the exact time of the refresh for materialized views in oracle? Is it ...
9
votes
5answers
3k views

How do I query this 20 million record view faster?

For a search functionality I am using a view that has the records from all the tables within which I need to search for. The view has almost 20 million records. Searches against this view are taking ...