How to Categorize Uncategorized Data
Using SQL to perform cluster analysis to gain insight into data with unknown groups
2015-04-16
5,183 reads
Articles
Selecting Data Using the TOP Clause
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
534 reads
SQL Server Spatial Indexes
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
Prevent and Log Certain SQL Server Login Attempts
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
Never Ignore a Sort Warning in SQL Server
It is always bad news if your SQL queries are having to use the SORT operator. It is worse news if you get a warning that sort operations are spilling onto TempDB. If you have a busy, slow TempDB, then the effect on performance can be awful. You should check your query plans to try to eliminate SORTs and never leave a SORT warning unheeded. Fabiano Amorim shows the range of ways of getting information on what is going on with a query that is doing a SORT and when requests are made for memory.
2015-04-13
8,822 reads
Five Rules For Successful Conversations With DBAs
As a developer working with SQL Server, you'll need to work with DBAs at one point or another. Here are some easy ways to make those conversations go smoothly.
2015-04-10 (first published: 2013-09-24)
18,362 reads
The Internet of Things: A New World Order?
Was the marketing hook 'The Internet of Things' conjured up before the technical definition? Are we being persuaded to spend money on fending off yet another fantasy tsunami of data? Already, we have televisions that listen to, and report, your conversations; so are we facing the Science Fiction future of gadgets that report where you go, who you visit and what medications you take? As Robert Sheldon says; "It's big, almost too big to get your arms around".
2015-04-10
11,037 reads
Cardinality Estimator – What’s new in SQL Server 2014
SQL Server 2014 has introduced a rebuilt Cardinality Estimator (CE) with new algorithms. Which are the biggest differences between the new CE and the previous one? Which one works better? Read more to find out.
2015-04-09
6,828 reads
Creating a multi-option parameter report for SQL Server Reporting Services
If you have a reporting requirement where users want to enter report parameters by either selecting values from a dropdown list or entering To and From range values, Ghanesh Prasad explains how to accomplish this in a Reporting Services report?.
2015-04-09
9,591 reads
Blogs
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Backup to Immutable Storage
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Question of the Day
Backup to Immutable Storage
In SQL Server 2025, a backup can be made on Azure Immutable Storage. What changes in how the backup is created?
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