Solved

Tsql select statement

Posted on 2011-02-10
3
471 Views
Last Modified: 2012-05-11
What does it mean when a select statement has a @?
for example

Select @column1, @column2
From table1
0
Comment
Question by:SPLady
3 Comments
 
LVL 4

Expert Comment

by:IceCode
ID: 34864509
"The @CustID means it's a parameter that you will supply a value for later in your code. This is the best way of protecting against SQL injection. Create your query using parameters, rather than concatenating strings and variables. The database engine puts the parameter value into where the placeholder is, and there is zero chance for SQL injection."

From

http://stackoverflow.com/questions/361747/what-does-the-symbol-do-in-sql
0
 
LVL 14

Expert Comment

by:leoahmad
ID: 34864517
An identifier beginning with the "at" sign denotes a local variable or parameter.
0
 
LVL 5

Accepted Solution

by:
skrga earned 125 total points
ID: 34864528
@ is defining a variable

eg.:

The following example returns the SIGN values of numbers from -1 to 1.

DECLARE @value real
SET @value = -1
WHILE @value < 2
   BEGIN
      SELECT SIGN(@value)
      SET NOCOUNT ON
      SELECT @value = @value + 1
      SET NOCOUNT OFF
   END
SET NOCOUNT OFF
GO

.. i think :-)
0

Featured Post

Three Reasons Why Backup is Strategic

Backup is strategic to your business because your data is strategic to your business. Without backup, your business will fail. This white paper explains why it is vital for you to design and immediately execute a backup strategy to protect 100 percent of your data.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Hi, I have heard from my friends that it’s not possible to create Label Printing report using SSRS. I am amazed after hearing this words not possible in SSRS. I googled lot and found that it is possible to some of people know about the Report Bui…
This article explains how to reset the password of the sa account on a Microsoft SQL Server.  The steps in this article work in SQL 2005, 2008, 2008 R2, 2012, 2014 and 2016.
In a recent question (https://www.experts-exchange.com/questions/29004105/Run-AutoHotkey-script-directly-from-Notepad.html) here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…

829 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question