QA for Data
Often DBAs and developers might make quick data changes to correct user problems or application shortfalls. Steve Jones notes that we can make mistakes, and perhaps we should ensure we QA, or at least log, our changes.
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.
Stairway to SQL Server Security Level 8: Data Encryption
This stairway level will explore data protection through encryption, both when the data is in motion across the network or in memory and at rest in a table. You’ll learn about the encryption key hierarchy and the various kinds of keys you can use to encrypt data, as well as how you can manage the keys or let SQL Server do it for you.
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.
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).
Don't exaggerate the difficulties of the RDBMS
Phil Factor argues that in learning about relational databases such as SQL Server, we should encourage people to "break a few pots".
Maps in SQL Server Reporting Services
Learn how to add maps to your Reporting Services reports with this article from expert Adam Aspin.
Pre-built or Ad Hoc
Steve Jones talks about the ad hoc nature of some NoSQL databases and whether that's something that most users want.
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.
Blogs
T-SQL Tuesday #198 Roundup: How Do You Detect Data Changes?
Thank you to everyone who participated in T-SQL Tuesday #198! When I wrote the...
Optimizing Redshift Performance by Configuring WLM Queues
Efficient query performance in Amazon Redshift often comes down to how well you manage...
PowerShell Strikes Back: Return of the Loop
By gbargsley
Welcome back to PowerShell Strikes Back. We’re three weeks in, and the training is...
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Question of the Day
QUOTENAME Quote Parameters
When I use QUOTENAME(), I can optionally provide the character used to surround the string in the result. Can I use any character?
See possible answers