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2015-04-23 (first published: 2015-04-17)
8,898 reads
Access-control within the database is important for the security of data, but it should be simple to implement. It is easy to become overwhelmed by the jargon of principals, securables, owners, schemas, roles, users and permissions, but beneath the apparent complexity, there is a schema-based system that, in combination with database roles and ownership-chaining, provides a relatively simple working solution.
2015-04-22
6,866 reads
There are several different approaches to automating deployment of SQL Server Infrastructure-as-a-Service virtual machines in Microsoft Azure. Marcin Policht examines an approach that involves uploading or creating a custom operating system image which is well suited for scenarios where you want to deploy a custom-configured SQL Server instance to multiple virtual machines with minimal effort and maximum consistency.
2015-04-21
7,452 reads
One of the most certain ways of going wrong with any relational database is to get data conversion wrong. Implicit data conversion is a good feature for the expert but can cause a lot of trouble to the unwary. These boil down to seven ways of failing to get data conversion right. Rob Sheldon explains and gives sage advice on how to avoid the problems.
2015-04-20
7,337 reads
The job of a DBA requires a fusion of skill and knowledge. To acquire this requires a craftsman mindset. Craftsmen find that the better they get at the work, the more enjoyable the work gets, and the more successful they become. Deliberate practice, Specialization and an appetite for overcoming difficulty are good habits to deliberately adopt to successfully grow those craftsmanlike skills to the point that you become “so good they can’t ignore you”.
2015-04-17
9,586 reads
Using SQL to perform cluster analysis to gain insight into data with unknown groups
2015-04-16
5,182 reads
There are times when you don’t what to return a complete set of records. When you have this kind of requirement to only select the TOP X number of items Transact SQL (TSQL) has the TOP clause to meet your needs. In this article Greg Larsen explores how to select a subset of data from a record set.
2015-04-16
9,580 reads
2015-04-15
532 reads
Spatial Data in SQL Server has special indexing because it has to perform specialised functions. It is able, for example, to break down an indexed space into a grid hierarchy by using a technique called tessellation. This is a rules-based system that, when you compare a shape to an index, works out how many cells in the the grid hierarchy are touched by that shape , and how deep down the grid hierarchy to search. There is powerful magic in Spatial Indexes as Surenda and Roy explain.
2015-04-15
7,242 reads
Aaron Bertrand presents a more elegant to prevent developers from attempting to log into production databases using application logins (and to log any such attempts).
2015-04-14
7,318 reads
By Steve Jones
dolorblindness – n. the frustration that you’ll never be able to understand another person’s...
By Steve Jones
I had a customer ask about analyzing their Test Data Manager (TDM) usage to...
By Steve Jones
I had an idea for an animated view of a sales tool, and started...
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In SQL Server 2025, if I want to remove an IP from a listener, what do I do?
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