?
Solved

SQL select statement

Posted on 2013-06-24
5
Medium Priority
?
593 Views
Last Modified: 2013-06-26
I am trying to build a transact-SQL statment that I can paste into an xml document.
This Transact-SQL statement gives me what I want:

Select
'<wp:comment_author>'+name+'</wp:comment_author>'+  CHAR(13)+CHAR(10) +
'<wp:comment_author_IP>'+source_ip+'</wp:comment_author_IP>'+  CHAR(13)+CHAR(10)

Result:
 <wp:comment_author>john Doe</wp:comment_author>  <wp:comment_author_IP>170.12.14.133</wp:comment_author_IP>  

However when the source_IP field is null all I get returned is
NULL
I would like to get the output below: (so if source_ip is null it will list out everything else, with nothing at all as the value where the source_ip normally goes.
Below is what I want:
 <wp:comment_author>john Doe</wp:comment_author>  
<wp:comment_author_IP></wp:comment_author_IP>
0
Comment
Question by:cbeverly
  • 2
  • 2
5 Comments
 
LVL 16

Expert Comment

by:Surendra Nath
ID: 39271474
you have to do this

Select
'<wp:comment_author>'+name+'</wp:comment_author>'+  CHAR(13)+CHAR(10) +
'<wp:comment_author_IP>'+isnull(source_ip,'')+'</wp:comment_author_IP>'+  CHAR(13)+CHAR(10) 

Open in new window

0
 
LVL 27

Accepted Solution

by:
Zberteoc earned 2000 total points
ID: 39274761
When you build text from values of SQL variables or columns you will always have to wrap all the columns in ISNULL(col/variable, '<null_replacement_value>') especially when you concatenate. NULL involved in any oeration will result in NULL. SO just in case you should have the name wrapped in ISNULL as well:

Select
'<wp:comment_author>'+ISNULL(name,'')+'</wp:comment_author>'+  CHAR(13)+CHAR(10) +
'<wp:comment_author_IP>'+isnull(source_ip,'')+'</wp:comment_author_IP>'+  CHAR(13)+CHAR(10) 

Open in new window

0
 

Author Closing Comment

by:cbeverly
ID: 39277908
Thank you so much!!!
0
 
LVL 16

Expert Comment

by:Surendra Nath
ID: 39278796
Hey I posted the same solution a day before....
0
 
LVL 27

Expert Comment

by:Zberteoc
ID: 39278988
I agree, however is one thing to drop a solution "as is" and another thing to to give the solution along with some explanations of why and what. Split points could have worked though.
0

Featured Post

Visualize your virtual and backup environments

Create well-organized and polished visualizations of your virtual and backup environments when planning VMware vSphere, Microsoft Hyper-V or Veeam deployments. It helps you to gain better visibility and valuable business insights.

Question has a verified solution.

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

In the first part of this tutorial we will cover the prerequisites for installing SQL Server vNext on Linux.
This month, Experts Exchange sat down with resident SQL expert, Jim Horn, for an in-depth look into the makings of a successful career in SQL.
Using examples as well as descriptions, and references to Books Online, show the different Recovery Models available in SQL Server and explain, as well as show how full, differential and transaction log backups are performed
Viewers will learn how to use the INSERT statement to insert data into their tables. It will also introduce the NULL statement, to show them what happens when no value is giving for any given column.
Suggested Courses

850 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