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

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3answers
14k 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 ...
4
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1answer
3k views

What is a partitioned view?

What is a partitioned view? I googled but could not get a satisfactory result.
4
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1answer
2k views

Do SQL Server Views update their data types automatically based on what tables feed them?

Someone mistakenly created a bunch of nchar fields in database tables. I noticed this, and after examining the issue, we're moving these fields to nvarchar types and trimming the values inside. In my ...
4
votes
2answers
14k views

Problem with mysqldump and view

When using mysqldump to backup MySQL, I got following error. mysqldump --all-databases --routines >> all.sql mysqldump: Couldn't execute 'show table status like 'hdkien'': SELECT command denied ...
4
votes
1answer
34k views

Oracle SQL create view privileges

This is more of a theoritical question but I need help ASAP. Here it is: With the appropriate use of SQL queries, grant as system administrators the required access privileges to a database user ...
4
votes
1answer
3k views

Join To a @Table Variable is running ineficiently

Alright so I have a report sproc that was running incredibly slow. Customers were complaining that the report would not run so I started investigating exactly where in the sproc the problem was and I ...
4
votes
2answers
3k views

Improving performance of nasty nested-view joins

I have a moderate-sized database spread out over a few tables, the rough architecture is: Input Data (Data ID, Session ID and a few fields of statistical importance) Input File (Data ID and a blob) ...
4
votes
2answers
178 views

Partitioned Views - Storage of Indexes

I have a single table that contains 4 billions rows that I plan on splitting up in to separate tables for each Quarter of the year. Then I want to create a partitioned view across all tables. At the ...
4
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1answer
481 views

Adding indices to views

I have a table that contains XML data in a varchar type field. This field is used to store data from a variety of different XML schemas some of which are related via a record stored in another table. ...
4
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1answer
1k views

Determining whether column in view can only contain unique values

I have a SQL Server 2008 database with several views. I'm looking for a way to definitively determine whether a particular view has a column that can only contain unique values (i.e. can be used as a ...
4
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1answer
156 views

Performance problems with TOP and user defined functions in views

I have problem with performance of queries on simple query on view. To keep things simple, assume my view is defined as follows: CREATE VIEW [mon].[ViewDevicesWithGroups] AS SELECT Id, Name, ...
4
votes
2answers
5k views

sql 2008, select from a view as a different user, like owner

In sql server 2008, the system views sys.database_role_members and sys.database_principals, only returns the users and group that the current account is allowed to view. I need to check id a certain ...
4
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2answers
3k views

SQL Server Linked Server to Progress is slow with an openquery view

We have a SQL Server database setup with a Linked Server setup connecting to a Progress OpenEdge database. We created a SQL Server view (for using with SSRS) of some of the OpenEdge tables using code ...
3
votes
2answers
548 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 ...
3
votes
2answers
951 views

Use a view to join tables or a stored procedure for a better execution plan?

First let me state I am a C# developer, not a SQL Server DBA, so please excuse my ignorance on SQL Server database query execution plans. What I want to know is for a stored procedure which the ...
3
votes
3answers
463 views

Why set up static data in views vs. using tables in mysql?

I get an LDAP feed nightly. I get it as a text file and dump/create my LDAPALL table. There are roughly 75K employees times about 50 fields. I have the following too: LDAPIMPORTANT - view that ...
3
votes
2answers
2k 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
1answer
209 views

Error when using views on a linked server

I have this query: SELECT - FROM -.dbo.tblTipoEntrevistador WHERE -IN ( SELECT CASE WHEN EXISTS ( SELECT * ...
3
votes
1answer
3k views

Why is the ORDER BY clause in a view ignored as soon as it's called with a WHERE claue?

I have a view that joins several tables, just to simplify a frequently called query. This view has an ORDER BY clause on a calculated field (the order will never be different). (on SQL Server Express ...
3
votes
1answer
135 views

Bad performance with select on view if check for 'is null'

I have two quite simple tables, and a view to join them on bigint fields: CREATE TABLE foo.ao ( id serial NOT NULL, ao_id bigint NOT NULL, ao_plz text, ao_community text, ao_street text, ...
3
votes
1answer
1k views

Mysql slow select from a view

I would appreciate an approach with this problem, I have a lottery system in mysql, this system receives a lot of transaction per second.. a lot!. I need to check the total amount for each the number ...
3
votes
1answer
4k views

In creating view use SQL Security definer or invoker?

CREATE VIEW syntax is CREATE [OR REPLACE] [ALGORITHM = {UNDEFINED | MERGE | TEMPTABLE}] [DEFINER = { user | CURRENT_USER }] [SQL SECURITY { DEFINER | INVOKER }] VIEW view_name ...
3
votes
1answer
117 views

Is it possible to create a database called C that is a view into all tables in database A + B?

Using SQL 2005 or 2008, is it possible to create a database called C that is a view into all tables in database A + B ? Databases A, B, and C are on the same local server. I am wanting to be able ...
3
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1answer
330 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 ...
3
votes
1answer
802 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?
3
votes
2answers
4k views

Grant permissions on views, deny select on tables

I have a MySQL user and I want it to view ONLY the views I want and not any other table in the database. I've granted this user permissions only on certain views as following: GRANT SHOW VIEW ON ...
3
votes
1answer
491 views

Can indexing views in SQL Server 2005+ speed up SELECT count(*) from a View?

My initial question was How does someone determine if it is a good idea to index a view?. Update: My underlying assumption was that indexing views speeds them up. This is apparently not sensible, ...
3
votes
2answers
2k 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
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2answers
13k views

SQL SERVER - Linked Server and query performance

I have a performance problem related to SQL Server/linked servers/views. I hope you can help me understand what is the best way to do what I want =). I have a database K with 3 linked servers ...
3
votes
1answer
4k views

PostgreSQL 9.1 - Query on VIEWS taking a lot of time

Using PostgreSQL 9.1, we are having problems while executing queries on a VIEW of PostgreSQL. Following is the situation: We have a partitioned Table "buz_scdr" over which we have built a VIEW ...
3
votes
1answer
6k views

Oracle: How to create a not null column in a view

Given a table like: CREATE TABLE "MyTable" ( "MyColumn" NUMBER NOT NULL ); I want to create a view like: CREATE VIEW "MyView" AS SELECT CAST("MyColumn" AS BINARY_DOUBLE) AS "MyColumn" FROM ...
3
votes
2answers
374 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 ...
3
votes
1answer
31 views

Select Permissions Multiple Schema

I have an interesting one that I have not had the pleasure of solving before. I have been asked by a client to implement some views for reporting purposes, the views will be accessed via PowerBI, ...
3
votes
1answer
154 views

How do I make this Postgres view that performs a join updatable?

I've got two tables, products and subscriptions: CREATE TABLE products ( id bigint NOT NULL, title character varying(75), description text, manufacturer_id bigint, created_at ...
3
votes
1answer
125 views

Slow MySQL query, not sure why

I'm working with an intranet application for property tax collection, and I've hit a snag. The following view runs much slower than I'd expect: create or replace view propertytaxessub0 as select ...
3
votes
2answers
3k views

while restoring mysql database, views changed into tables

I have a full database dump and i restored it. But in my new restored server all the views are appeared as MyISAM tables. In early times dumps were restored perfectly. can anyone help me to trigger ...
3
votes
1answer
8k views

Problem with View When Restoring a MySQL Backup

I have a database (InnoDB) with some tables, views and routines... Periodically I do a backup using the command line: mysqldump -u user -ppassword --routines db_name > backup.sql But I have a ...
3
votes
2answers
209 views

Joining two Mysql VIEWs takes a very long time

I have a textbox (for which I used jQuery auto-completion) in my PHP form where user can insert an actor/actress name and then by clicking "Search" button, a new window is opened showing list of ...
3
votes
1answer
151 views

view corrupted when viewed using design feature

All, I had a very strange thing happen last Friday. We have a table that is updated on a daily basis using a job that fires a proc that utilizes a view. The columns were being transposed from the view ...
3
votes
1answer
4k views

Grant select to dbo view without select on non dbo tables

SQL Server 2008 R2 We have a login & user called "JoeBlogs", this user has it's own default schema of JoeBlogs - it has Public access only to the database. We then granted it SELECT on a dbo ...
3
votes
1answer
257 views

Views - Indexes/Keys/Execution Plans

I am working with a SQL 2005 database server that contains multiple databases and tables that are replicated from various sources. No one but administrators have access to this server. There is a ...
3
votes
0answers
47 views

Possible SQLite bug?

I am running into an issue with SQLite that I think might be a bug. When I run the PRAGMA table_info command on a view that uses an aggregate function, the data type always comes up empty. To ...
2
votes
2answers
373 views

Why the WHERE clause is not pushed down in the view's query?

With Postgres 9.4, I'm doing the following query quite often: SELECT DISTINCT ON(recipient) * FROM messages LEFT JOIN identities ON messages.recipient = identities.name WHERE timestamp BETWEEN timeA ...
2
votes
1answer
59 views

How to use a view to span two tables that are identical

We have table A that receives data from our shop floor and we currently have it so that the data is moved from table A to table B after 5 years. I want to streamline this but need help creating a ...
2
votes
2answers
584 views

What reason is there to create a physical table for a report output?

I've noticed that for Crystal Reports made by our organization and by some of our ERA software providers have a tendency to use physical tables for their reports' data sets, rather than using a view ...
2
votes
3answers
2k views

do MYSQL views occupy physical space?

do MYSQL views occupy physical space? Or in other words, is a MYSQL database limited to a certain number of views?
2
votes
1answer
4k views

How to pass a parameter into a function

At the moment I have a view created, see it here in the answer. How can I create a function based on that crosstab() query , so I can pass a date, and get data for the specific date? Also is it good ...
2
votes
2answers
910 views

View column has an 8000 character limit?

In SQL Server 2008 R2 we are using an updateable view to update a varchar(max) column. When we update the column with text and then check the number of characters, it is showing a length of 8000 ...
2
votes
2answers
62 views

Why am I able to query for more than 1024 columns but I can not make a view of the same query?

My boss is requesting a view with greater than 1024 columns where in he will only select a few columns he wants when he queries the view so that the actual returned columns are less than 1024. Why am ...
2
votes
1answer
450 views

Does view take advantage of table indexes

I have a table with a clustered index and 2 non clustered index. Now, in my view I am selecting everything from my table create view dbo.MyView as Select * from MyTable Now, when I am using this ...