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Headlines today   September 22, 2014

Premature Optimisation

Learning how to tune a system is a bit of science and a bit of an art. Gail Shaw gives some guidelines on when you might want to tune and how to go about it so as not to unnecessarily undertake the effort.  Read more...
By Gail Shaw 2014/09/22 | Source: SQLServerCentral.com | Category: performance tuning
Rating: |  Discuss |   Briefcase | 3,331 reads

Prevent Confidential Data at the Application Layer from getting into SQL Server

In this tip Tim Smith looks at different approaches to stop confidential data from getting into the database.  Read more...
By Additional Articles 2014/09/22 | Source: MSSQLTips.com | Category: security
Rating: (not yet rated)  Rate this |   Briefcase | 4,384 reads
Previous headlines

Hierarchies on Steroids #1: Convert an Adjacency List to Nested Sets

SQL Server MVP Jeff Moden shows us a new very high performance method to convert an "Adjacency List" to “Nested Sets” on a million node hierarchy in less than a minute and 100,000 nodes in just seconds. Not surprisingly, the "steroids" come in a bottle labeled "Tally Table".  Read more...
By Jeff Moden 2014/09/19 (first published: 2012/11/13) | Source: SQLServerCentral.com | Category: hierarchy
Rating: |  Discuss |   Briefcase | 13,717 reads

A TDD Journey: 3- Mocks vs. Stubs; Test Frameworks; Assertions; ReSharper Accelerators

Test-Driven Development (TDD) involves the repetition of a very short development cycle that begins with an initially-failing test that defines the required functionality, and ends with producing the minimum amount of code to pass that test, and finally refactoring the new code. Michael Sorens continues his introduction to TDD by implementing the first tests and introducing the topics of Test doubles; Test Runners, Constraints and Assertions.  Read more...
By Additional Articles 2014/09/19 | Source: SimpleTalk | Category: test driven development
Rating: (not yet rated)  Rate this |   Briefcase | 4,843 reads

Data Mining Part 17: Working with Reports

In this chapter, we will learn how to create Data Mining Reports using Reporting Services.  Read more...
By Daniel Calbimonte 2014/09/18 | Source: SQLServerCentral.com | Category: data mining
Rating: |  Discuss |   Briefcase | 2,640 reads

Azure Virtual Machines Part 0: A VM Primer

Mike Martin kicks off his series on Azure Virtual Machines with a primer, full of background and terms. To fully understand the Azure Virtual Machines offering, Mike explains how everything is connected and co-existing.   Read more...
By Additional Articles 2014/09/18 | Source: Just Azure | Category: azure
Rating:  Rate this |   Briefcase | 5,263 reads

Stairway to PowerPivot and DAX - Level 7: Function / Iterator Function Pairs: The DAX AVERAGE() and AVERAGEX() Functions

Business Intelligence architect, Analysis Services Maestro, and author Bill Pearson explores the DAX AVERAGE() and AVERAGEX() functions, comparing and contrasting the two. He then provides some hands-on exposure to the use of each, particularly in combination with other DAX functions, in generating arithmetic means within our PowerPivot model designs.  Read more...
By Bill Pearson 2014/09/17 | Source: SQLServerCentral.com | Category: stairway series
Rating: |  Discuss |   Briefcase | 1,589 reads

Free eBook: SQL Server Transaction Log Management

When a SQL Server database is operating smoothly and performing well, there is no need to be particularly aware of the transaction log, beyond ensuring that every database has an appropriate backup regime and restore plan in place. When things go wrong, however, a DBA's reputation depends on a deeper understanding of the transaction log, both what it does, and how it works.  Read more...
By Press Release 2014/09/17 (first published: 2013/08/14) | Source: Red-Gate | Category: transaction logs
Rating:  Rate this |   Briefcase | 33,974 reads

The Mindset of the Enterprise DBA: Harnessing the Power of Automation

After you have done the necessary groundwork of standardising and centralising your database adminstration processes, you are now in a position to implement some effective automation of some of these processes. Which ones do you choose, and how do you set about automating these tasks?  Read more...
By Additional Articles 2014/09/17 | Source: SimpleTalk | Category: dba skills
Rating:  Rate this |   Briefcase | 6,718 reads

The Ins and outs of In-Memory OLTP

As you may know, SQL Server is a very robust database, but SQL server has its performance bottlenecks. With the introduction of In-Line memory OLTP, there is a chance to get rid of the performance bottlenecks   Read more...
By Roy Ernest 2014/09/16 | Source: SQLServerCentral.com | Category: microsoft sql server
Rating: |  Discuss |   Briefcase | 4,754 reads
 
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From the SQLServerCentral Blogs

I Am Running For the PASS Board of Directors: #passvotes

This year, I submitted my application to run for the PASS Board and it was accepted. This then is my...  Read more...
By Grant Fritchey 2014/09/22 | Source: SQLServerCentral Blogs | Category: blogs
Rating: (not yet rated) |  Discuss |   Briefcase | 3,300 reads

Why I’m Not Excited About Hekaton (In-Memory OLTP)

A while back I had written a post about why I’m excited about Hekaton (now called ‘In-Memory OLTP’ – not sure...  Read more...
By Adam Kreul 2014/09/22 | Source: SQLServerCentral Blogs | Category: blogs
Rating: (not yet rated) |  Discuss |   Briefcase | 4,693 reads
Question of the Day

ISNULL

By Don Simpson 2014/09/22 | Category: t-sql
Rating: (not yet rated) |  Discuss |   Briefcase | 1,151 reads

What is returned by this batch?


DECLARE @testA TABLE ( i INT )
DECLARE @test INT

SELECT @test = ISNULL(i, -1)
    FROM @testA
SELECT @test
  Read more...
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