SQL Server high availability. Log shipping or replication, clustering or some other solution. It's a challenge and as companies grow more dependent on their databases, it's one that more and more DBAs face everyday. Paul Ibison has taken a look at how log shipping and replication can be compared in the quest for high availability.
2008-06-27 (first published: 2004-06-17)
66,421 reads
One of the four high availability technologies in SQL Server is replication, though this can be very cumbersome to setup and get working. Longtime author Paul Ibison looks at how this has changed from SQL Server 2000 to 2005 and what you should consider before setting this up.
2008-04-17
7,790 reads
SQL Server MVP Paul Ibison takes a look at how transactions are handled in replicated environments and the implications of rollbacks.
2008-04-03
6,953 reads
This article explains how to import text files using SSIS in those cases where the text files have different formatted data on different rows. The solution recommended involves minimal coding and is highly maintainable.
2008-03-05
8,875 reads
Longtime author Paul Ibison brings us a short look at a common problem in Integration Services: your source has no column names.
2008-02-27
7,438 reads
Integration Services allows you to import all kinds of data easily into SQL Server as well as transform is along the way. Longtime author Paul Ibison brings us a look at how you should set your transformations to deal with NULL values.
2008-02-13
14,204 reads
SQL Server 2000 replication is usually simple and easy to setup and work with. However there are many restrictions to ensure this, one of which is the alteration of a column which is engaged in replication. Author Paul Ibison brings us two options for altering columns.
2008-01-14 (first published: 2005-01-19)
45,610 reads
SQL Server 2000 replication is a great feature, but it can cause some headaches at times. Since the use of identities is something many people take advantage of, learning to handle these in a replication scenario is critical. Author Paul Ibison has done extensive work with replication and brings us two techniques to help manage the ranges of values.
2005-01-13
12,802 reads
There are many times when you might be concatenating text in a stored procedure to make a where clause, because the input parameters are optional. An alternative is to create many versions of the stored procedure - one for each possible combination of parameters - which can soon become too big. There is a more […]
2001-11-25
4,295 reads
When implementing a pilot study of audit trail triggers, you often want a way of removing all triggers in the database in order to retest your scripts: here it is!
2001-11-08
1,523 reads
By Steve Jones
Redgate is a for-profit company. We look to make money by building and selling...
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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