A virtual table that represents the data in one or more tables in an alternative way.
0
votes
2answers
1k views
Hide column if any value is null or zero via proc sql or view [closed]
Given either of the two following datasets
Kağıt Cinsi Sarı Yeşil Mavi
Kalın 4 0 5
İnce null 0 3
or
Kağıt Cinsi ...
2
votes
2answers
811 views
Set permissions on a view
I'm creating a view on a SQL Server 2005 database via SQL Server Management Studio 2008, the view reads from two tables. The view is accessed from a web application and I want users to be able to ...
3
votes
2answers
2k views
How can I help SQL Server recognize my view column is NOT NULL-able?
I have the following indexed view defined in SQL Server 2008 (you can download a working schema from gist for testing purposes):
CREATE VIEW dbo.balances
WITH SCHEMABINDING
AS
SELECT
user_id
...
4
votes
2answers
728 views
Does a view need its own foreign key constraints?
Disclaimer: I'm a programmer, not a DBA, so bear with me...
I have a view that I use to just map 2 entities together. I have to do a join between a few different tables to get that:
CREATE OR ...
11
votes
2answers
2k views
Is nested view a good database design?
I have read somewhere long time ago. The book states that we should not allow to having a nested view in SQL Server. I am not sure the reason why we can't do that or I might remember incorrect ...
3
votes
2answers
890 views
sys.database_files / sys.filegroups VS sys.sysfiles / sys.sysfilegroups
These catalog views seem to show the exact same data. What is the point of having multiple system views that seem to show the same thing?
Here is how I proved it is the same data:
select
...
3
votes
2answers
301 views
Join condition on complex views
If i join two/more complex views (views that are made up by joining two/more tables); would it result in multiple iteration of reads on the base tables?
Would it not be more efficient just to have ...
2
votes
1answer
167 views
Tablespace consumed by views
I was in an SQL class where the instructor said "DBAs don't like it when users create views, because they will clobber tablespace."
Obviously, I understand that any schema object will consume some ...
1
vote
3answers
4k views
When creating views, why do users need direct object permissions if they already have the same permissions via a role?
I'm having a problem with permissions in Oracle 10g. I'm hoping someone can help me make sense of this.
I have a schema with a table in it. I have granted select on that table to a role.
grant ...
5
votes
2answers
6k views
Modify DEFINER on Many Views
I have am having problems backing up my databases after an update. I have been poking around on my system trying to figure out why. One query I ran returned this result.
Got error: 1449: The user ...
8
votes
3answers
799 views
What are the alternatives for an ORDER BY clause in a View?
This question just had to be in this site :)
ORDER BY is forbidden to use in a view, as I understood because of the possibility for multiple order by's when using this view.
I know that there are ...
6
votes
1answer
641 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
240 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 ...
7
votes
1answer
1k 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
580 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
354 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?
5
votes
2answers
4k 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?
6
votes
1answer
627 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 & ...
6
votes
1answer
2k 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
1k 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 ...
