2009-08-03
3,110 reads
alzdba
- Interests: family, mantrailing / dogs, riding my motorbike, volleyball
- Twitter: @forget this one @alzdba
Scope: The drastic caveat with Logon Triggers.
In this article, Johan Bijnens shows how logon triggers can bite you in the back.
2008-12-15
9,196 reads
2008-09-10
4,469 reads
HowTo prevent BOL getting Online help
Books Online will try to connect to the net and it may get stuck if there is no internet connection.
2008-06-16 (first published: 2008-05-07)
436 reads
2007-12-21 (first published: 2007-10-25)
1,424 reads
How to handle lost LF/CR when copying [code]
A quick workaround from a longtime community member that helps you prevent the LF/CR from being lost if you copy scripts from the code tags in your posts.
2007-11-27
1,306 reads
SQL Server and SOX
The Sarbanes-Oxley act has changed many IT jobs, usually requiring more work and documentation. Johan Bijnens brings us a list of some things his team has had to do to comply with SOX regulations.
2007-10-02
5,760 reads
Getting SQLAgent to Respond Faster
One limitation of SQLAgent is that granularity to which you can schedule jobs: every minute. Sometimes there are things that you would like to happen more frequently, like alerting. Johan Bijnens brings us a technique for getting your SQL Agent to respond to alerts in as little as every 10 seconds.
2007-08-16
5,827 reads
help to tighten use of cmdshell or sp_start_job
-- The goal is to avoid the use of sp_start_job in an application. So we have the application use RAISERROR to activate the job.-- 1) because you can only start jobs you own-- 2) we don't want to open the cmdshell to everyone-- 3) we want control regarding jobs that run on our server.-- 4) […]
2007-05-31 (first published: 2004-01-21)
2,175 reads
Detect invalid FK-data after using "WITH NOCHECK"
In situations where FK's have been created using the "WITH NOCHECK" option you can get into troubles because the FK-data is not checked ! (so there may be invalid data in the FK-column !)E.g. ALTER TABLE [dbo].[mytable] WITH NOCHECK add constraint [FK__USED_RESO__Actio__1162CF5F] FOREIGN KEY ( Action_Type ) REFERENCES [dbo].[Action_Types] ( Action_Type ) BOL states "... […]
2007-05-29 (first published: 2006-10-09)
555 reads
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Question of the Day
The string_agg function
We create the following table and then insert some records in it:
create table t1 ( id int primary key, category char(1) not null, product varchar(50) ); insert into t1 values (1, 'A', 'Product 1'), (2, 'A', 'Product 2'), (3, 'A', 'Product 3'), (4, 'B', 'Product 4'), (5, 'B', 'Product 5');What happens if we execute the following query in both Sql Server and PostgreSQL?
select id,
category,
string_agg(product, ';')
over (partition by category order by id
rows between unbounded preceding and unbounded following) as stragg
from t1; See possible answers