Have you ever wanted to run a query across every database on a server with the convenience of a stored procedure? If so, Microsoft provided a stored procedure to do so. It’s unreliable, outdated, and somewhat obfuscated, though. Let’s improve on it!
2016-04-15 (first published: 2014-12-01)
17,005 reads
Sometimes, in the quest for raw SQL performance, you are forced to sacrifice legibility and maintainability of your code, unless you then document your code lavishly. Phil Factor's SQL Speed Phreak challenge produced some memorable code, but can SQL features introduced since then help to produce code that performs as well and is also easy to understand? Kathi Kellenberger investigates.
2016-04-15
5,825 reads
This new chapter will show you how to work with the SSIS Data Mining Query Transformation Task
2016-04-14
2,544 reads
Code coverage is a practice that goes hand in hand with automated testing, reporting the percentage of your code that has been exercised during a test run. Ed Elliott and Redgate have partnered to make a code coverage tool available for SQL Server, both free and open source. SQL Cover measures the coverage of your SQL Server stored procedures and functions. It has built-in support for the popular tSQLt unit testing framework, but can also be used alongside any automated testing framework of your choosing. Find out more in this blog post.
2016-04-14
4,457 reads
Paul White shows how an update may fail when a partition has some data on a read-only filegroup, and explains several workarounds.
2016-04-13
2,455 reads
Learn about deadlocks and how you might better troubleshoot the issues involved.
2016-04-12
5,177 reads
The 2015/16 Simple-Talk Awards have concluded, the votes have been counted and recounted, and the winners have now been announced.
2016-04-12
2,372 reads
With the new temporal table feature, SQL Server 2016 internally manages two tables: a base table, which contains the latest data all the time, and a history table, which contains a history of all of the changes. Arshad Ali looks at the new feature, how it works, and how to either create a new table with this feature or enable it for an existing table.
2016-04-11
4,139 reads
Special Characters can lead to many problems. Identifying and reporting on them can save a lot of headache down the road.
2016-04-08 (first published: 2014-08-19)
147,896 reads
With database deployments, not all script-based processes are equal. Some use change scripts in a free-and-easy way, and some, which are normally called ‘migrations-based approaches’, have more discipline around them. In this article, Redgate Product Manager Elizabeth Ayer covers ‘migrations’, and shows some of the benefits that have come with new tooling which is specifically designed to assist the change script processes.
2016-04-08
3,078 reads
By Steve Jones
Redgate is a for-profit company. We look to make money by building and selling...
I’ve uploaded the slides for my Techorama session Microsoft Fabric for Dummies and my...
If you've ever loaded a 2 GB CSV into pandas just to run a...
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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