.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
Gaurav Pal
Post New Web Links

Explicit Expression Aliasing in SQL Queries

Posted By:      Posted Date: October 07, 2010    Points: 0   Category :Sql Server

Due to restrictions on implicit column alias usage in SQL queries (only in ORDER BY), Emtucifor (Erik) suggested the idea of explicit expression aliasing. I like the approach because it makes the query easier to read and increases the SQL developer productivity. What do you think?

Example query for explicit expression aliasing:

  SUM (H.TotalDue) TotalSales
FROM AdventureWorks2008.Sales.SalesOrderHeader H
  YEAR (H.OrderDate) AS [Year],
  MONTH (H.OrderDate) AS [Month]
WHERE [Year] > 2002
GROUP BY [Year], [Month]
ORDER BY [Year], [Month]

This thread is a spin-off from: http://social.msdn.microsoft.com/Forums/en/transactsql/thread/4ad14cad-1e61-43a0-96f8-70a506106a00


Kalman Toth, SQL Server & Bu

View Complete Post

More Related Resource Links

Automatic vs Explicit Properties

If the reason that motivated the change from automatically implemented property to explicitly implemented property was to change the semantics of the property then you should evaluate whether the desired semantics when accessing the property from within the class are identical to or different from the desired semantics when accessing the property from outside the class.

Which tier do Linq queries belong?


Started in middle of a new project.  Our design architecture uses an n-tier (not MVC - no controllers) structure with Presentation, Data, Business and Service tiers.  However the lead analyst has the majoriety of code all in the Business tier claiming it all contains Business logic.  Our data tier is nothing more than a single .dbml model of the primary database to support all of the Linq queries in the Business tier.  To my mind Linq queries and classes they use are data access and belong in the data tier  but our lead analyst says they contain business logic therefore have to be in business layer.  

Combining two LDAP queries


Hey guys, I have these two queries I'd like to combine into one.  Is there any way of doing it?
Query 1: (&(!cn=SystemMailbox{*})(&(&(ou>="")(name=executive*)(objectCategory=organizationalUnit)(ou=*operations))))
Query 2: (&(!cn=SystemMailbox{*})(&(ou>="")(name=50*)))
Thanks in advance.

Hey guys, I have these two queries I'd like to combine into one.  Is there any way of doing it?


[How??] Lamda expression with ByRef parameter


How to write lamda expression with ByRef/ref parameter in c# ??

The code below causing syntax error:

item.OnAction = (p1, p2, ref p3) => {
   return true;

item.OnAction = (p1, p2, & p3) => {
   return true;

Express Yourself: Encoding Videos Using Microsoft Expression Encoder 3 SDK


Video on the Web involves huge amounts of data. Learn the best way to manage and move that data with the help of Microsoft Expression Encoder 3.

Adam Miller

MSDN Magazine June 2010

Data Points: LINQ Projection Queries and Alternatives in WCF Services


LINQ's ability to project randomly shaped data into anonymous types can be a blessing and a source of frustration, says Julie Lerman. It's great when you just need to grab a special view of your data, but it can be problematic in certain circumstances. She explains what the limitations are and how to get around them.

Julie Lerman

MSDN Magazine May 2010

Security Briefs: Regular Expression Denial of Service Attacks and Defenses


Microsoft security expert Bryan Sullivan believes denial-of-service blackmail attacks will become more common as privilege escalation attacks become more difficult to execute. He demonstrates how to protect your apps against regular expression DoS threats.

Bryan Sullivan

MSDN Magazine May 2010

Data Points: Precompiling LINQ Queries


Did you know that by precompiling LINQ queries you might actually be degrading your app's performance if you're not careful? Julie Lerman explains how to ensure you're not re-precompiling queries each time and losing the expected performance benefits across post-backs, short-lived service operations and other code where critical instances are going out of scope.

Julie Lerman

MSDN Magazine March 2010

Toolbox: Easy LINQ Queries, Becoming A Better Developer, And Logging Help


This month Toolbox provides help with error logging, finds an app that helps you write LINQ queries, and explores the non-technical side of development.

Scott Mitchell

MSDN Magazine September 2008

Silverlight: Create Animations with XAML and Expression Blend


In this excerpt from his upcoming book, Laurence Moroney explains the basics of Silverlight animation and the animation tools available in Expression Blend.

Lawrence Moroney

MSDN Magazine August 2008

Silverlight: Create a Custom Expression Encoder Publishing Plug-In


Laurence Moroney demonstrates how to employ the Expression Encoder plug-in APIs by building and debugging a simple FTP upload plug-in.

Laurence Moroney

MSDN Magazine February 2008

Parallel LINQ: Running Queries On Multi-Core Processors


Use Parallel Language Integrated Query (PLINQ) to take advantage of multi-processor computers and the newer wave of multi-core processors.

Joe Duffy and Ed Essey

MSDN Magazine October 2007

Hanselminutes Podcast 227 - Inside Expression SuperPreview with developer Mike Calvo

Scott talks to Mike Calvo, a Microsoft Lead Developer based out of Minnesota (!) about Expression SuperPreview. SuperPreview helps developers and designers with cross-browser CSS and HTML issues. How'd they build it and with what? What's inside? How does the cloud fit in and how do they support Safari? I played with SuperPreview a bit last year, but started looking at it again last month when I noticed that version 4 has introduced support for Safari on Mac via a Cloud-based Remote Service. I fired up Expression SuperPreview 4, and saw this: Then I signed up: Which enabled Mac Safari for this initial beta. I assume they'll add a pile of other browsers. If I don't see immediate browser support for ALynx, the Amiga port of Unix...(read more)

Help with regular expression


I am using this regular expression: /.*-lyrics-.*$

and I need the expression find urls like this:

and it do really does that!

The problem is that it finds also this URL:

Whar regular expression should I use to exclude urls that end with /lyrics ?

Thanks :]



Regular Expression to Match


Here is the kind of text I want to match via a regular Expression

The id="dgSchedule" is always present in the TAG but its location may differ

The table is span over multiple line/contains white spaces/tabs...

I have the regular expression to match the start and end tag respectively over a single line

\<table .*\>


The problem is to match the whole table span over multiple lines

<table cellspacing="0" rules="all" border="1" id="dgSchedule" style="border-style:None;height:100%;width:100%;border-collapse:collapse;">
	<tr class="blackbar" align="center" style="background-color:#7FB4DE;font-family:Verdana;font-weight:bold;height:20px;">
		<td>From Place</td><td>To Place</td><td>Time</td><td>Bus Type</td>

	</tr><tr style="background-color:#DEECF5;">
	</tr><tr style="background-color:#EFF5FA;">
	</tr><tr style="background-color:#DEECF5;">

ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend