I would like to set READ_COMMITTED_SNAPSHOT to ON on my SQL Azure database, but the following code, which works with other versions of SQL Server, is not supported in Azure:
ALTER DATABASE [database_name]
SET READ_COMMITTED_SNAPSHOT ON
GO
First question: Is it still a good idea to set READ_COMMITTED_SNAPSHOT to ON in SQL Azure (or whatever achieves the same result)? My intention is not to lock records when they are just being read, in order to improve performance.
Second question: If it is a good idea, what's the Azure syntax for doing it?
From what I can tell based on this MSDN article the setting you are after is on by default and cannot be changed. More details about the Isolation Levels themselves can be found here.
Related
I have two users on windows server
Administrator
devUser
Both can use SQL Developer to connect to Oracle 11g Server (Oracle e-Business suite) but in the same query (from synonym) they got the difference result: devUser got the correct result and Administrator got null in first three columns.
SELECT * from XXAUTO.XXFND_OU_COMPANY_V
where ou_name like 'ASL%'
Query Result from Administrator(Windows User)
Seems like the view has some form of VPD in place. Oracle supports Fine-Grained Access Control through its DBMS_RLS package, which despite the name allows us to implement security policies on columns as well as rows (since 10g). Find out more.
The common model is, when users connect to the database a LOGON trigger populates an application context with details about them. These details are used to generate as additional filters on tables and views which have security policies in place. You can confirm this by using the pertinent views: start with ALL_POLICIES and drill down depending on what you find.
It's possible the view implements a hand-rolled version of this (FGAC is an Enterprise Edition feature) but if you're using EBS that seems unlikely.
Another option is that your database is protected by Oracle Database Vault. This product is a chargeable extra to the EE license. It is a very powerful tool, and one of its uses is to prevent super users like sysadmins or DBAs abusing their privileges to look at sensitive data. It seems unlikely that an organisation would put Database Vault in place on a server that developers have access to but I offer this suggestion for completeness. Find out more.
Thank you for all.
Now I found the problem that is both user set the different Windows locale.
I want to develop indicators using Microsoft Power BI.
I have a Datawarehouse on SQL Server and I directly query from the DW.
I would like to display different information according to the user accessing the report.
I didn't find a way on how I can dynamically filter the data according to the user account.
Is it possible?
If not, then what are the possible solutions to do it?
I believe what you are looking for is Row-Level Security and it is out with Sql server 2016 and Azure Sql DB, check here: https://msdn.microsoft.com/en-us/library/dn765131.aspx
I too have been looking for a similar solution to the same problem, I am using Azure SQL DW and I have been told the Row-Level Security will be coming to AzureSQLDW with GA, but not sure of the date on that.
So back to your question as far as I know the only possible solutions would be to use Sql 2016 Row-Level Security or you can also use SSAS in front of your data warehouse.
Hope that helps.
This came up once before: Use DataContext.CreateDatabase in SQL Azure
The answer accepted was "maybe it's not possible". Didn't seem like a full answer.
I have a set of classes fully defined and I am wanting to create a database on Azure for this. It's not working because the USE statement does not work: http://msdn.microsoft.com/en-us/library/azure/ee336288.aspx
So, the database gets created as blank, and internally Linq generates a USE statement to move to that database and start adding tables. This fails and it throws an exception.
So how can I create my database? Can I use Linq to add tables to an existing database? Can I enable USE on Azure somehow? Seems ridiculous this does not work.
After messing around for a while on this, I ended up creating the database against a local SQL Server instance. Then used SQL Server Management Studio -> Tasks -> Script Database, and turned on the export type to be Microsoft Azure. Then I had the script file needed to run on the Azure server. I'll leave the question open for a day or two because I am curious if this can work with Azure directly somehow. If I don't hear anything, I will close it.
The USE statement does not switch between databases in Azure SQL Database. You will have to connect to the database to create a table on that database.
Regards
Dhruv
My delayed job has something to do with exporting slightly edited version of most of the tables in the app's database, and while doing so, it is critical that none of the current data is being edited.
Is it possible to lock the entire database while running this delayed job?
More Information:
The database to be exported is in PostgreSQL, Heroku's postgresql database, to be more specific.
The flow is something like (all below should be done automatically by the code):
site would be put in maintenance mode,
freeze then export the database, then
when exporting is complete, re-activate the site back
Given there is not a lot of information with your question, I am going to answer you as best I can.
1) What is the database type and model? Is it a standalone DB like MS Access or Informix SE?
2) If not a standalone engine, does this database support replication. I used to work a lot with MS SQL Server, and replication had implications while the database was live and being edited. That is the implications were whether edited data was replicated. In this case, consult the docs. Is it an option to use replication to preserve the current database?
3) What kind of task is this? It sounds like maintenance. Our Informix SE databases lock when being imported or exported. On the production server, it is my job to make sure no local server applications are trying to access the locked DB, and that our external payments web site cannot interfere while the db is locked.
4) If this is a production site that is not in maintenance mode, then I suggest you probably do not want to lock an entire database.
I am sorry for not answering your question directly, but more information is needed like are you asking if this can be done from the Ruby DB interface on some model of db.
I have an Access application with a SQL server back-end, mixed with quite a few DB objects local to the Access app. I've tried running SQL Profiler, but I got very little except a cryptic sp_execute 2,4288,4289,4290,4291,4292,4293,4294,4295,4296,4297.
I would like a trace tool that is local to the Access DB, so I also pick up any activity that doesn't go back to the SQL server.
As far as I know there is no such facility within Access but, depending on your case, you could try these few things:
Write a wrapper against SQL executables: that would mean replacing all calls to Execute, OpenRecordset etc within your VBA to an alternative version that would log the query.
This isn't going to catch everything obviously but it could help.
Move your local tables to another database and use ODBC to relink them to your original Access application. You can then use ODBC's logging facilities.
This could be the best altenative as it's fairly easy to setup for debugging.
It's not the best solution for a production environment though as all your calls to local tables will in fact go through ODBC, but again, it's a temporary solution for debugging.
Use ShowPlan and ISAMStats to view how Jet/ACE interprets your queries and get other database activity stats.
It's easy to setup by writing a key to the registry and you'll end-up with a log describing how your queries are analysed.
It's more useful for optimisation than logging but again, it could help.
Use Flextracer, a shareware, free for 30 days or so. My colleague here has just found this for us as we were going through a similar situation. Problem solved.
http://www.geardownload.com/development/flextracer-download.html
[]s,
Pedro Carneiro Jr.
pedrokarneiro#hotmail.com