Solved

SQL Select Case

Posted on 2013-05-22
7
317 Views
Last Modified: 2013-06-04
I have a Select statement that returns user messages, please see code below.
As you see I (try to) use a Select Case method to set correct values to "DeletedId" and "DeletedOut". What I want to do is this:

1. If [To]=@To then DeletedId must be 0, else DeletedId can be 0 or 1 (doesn't matter).
2. If [From]=@From then DeletedOut must be 0, else DeletedOut can be 0 or 1 (doesn't matter).

		
SELECT Id, [From], [To] FROM tblUserMessage
WHERE ([To] = @To OR [From] = @From) AND (SiteId = @SiteId) AND (Deleted = '0') AND DeletedIn = (Case when [To] = @To Then '0' else '[0 or 1]' END) AND DeletedOut = (Case when [From] = @From Then '0' else '[0 or 1]' END)

Open in new window

Hope someone please can help :)
0
Comment
Question by:webressurs
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
7 Comments
 
LVL 7

Expert Comment

by:Ross Turner
ID: 39187185
I would do you case statement on a select within a select e.g

Select
*
from
(
Select
Case
where field = field then 'something'
else 'other'
End as [Field]
from [YourTable]

) as Temp

where <inset your variables here>
0
 
LVL 7

Expert Comment

by:Ross Turner
ID: 39187213
i've created this example to give you a better idea of what i'm talking about

http://sqlfiddle.com/#!3/fc87a/3
0
 
LVL 1

Author Comment

by:webressurs
ID: 39187329
Thanks for your reply RossTurner!
I did not fully understand your example, hope is it possible to get some help with my code below.

SELECT Id, [From], [To] FROM tblUserMessage
WHERE ([To] = 'jason' OR [From] = 'jason') AND (SiteId = '2') AND (Deleted = '0') AND DeletedIn = (Case when [To] = 'jason' Then '0' else '[DONT CARE]' END) AND DeletedOut = (Case when [From] = 'jason' Then '0' else '[DONT CARE]' END)            

Thanks :)
0
Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

 
LVL 1

Accepted Solution

by:
webressurs earned 0 total points
ID: 39187348
I guess this is the solution I'm looking for?

SELECT Id, [From], [To] FROM tblUserMessage
WHERE ([To] = 'jason' OR [From] = 'jason') AND (SiteId = '2') AND (Deleted = '0') AND DeletedIn = (Case when [To] = 'jason' Then '0' else DeletedIn END) AND DeletedOut = (Case when [From] = 'jason' Then '0' else DeletedOut END)
0
 
LVL 69

Expert Comment

by:Scott Pletcher
ID: 39188390
SELECT Id, [From], [To]
FROM dbo.tblUserMessage
WHERE
    ([To] = 'jason' OR [From] = 'jason') AND
    (SiteId = '2') AND
    (Deleted = '0') AND
    ([To] <> 'jason' OR DeletedIn = '0') AND
    ([From] <> 'jason' OR DeletedOut = '0')
0
 
LVL 41

Expert Comment

by:Sharath
ID: 39189429
If you have data like this. Can you let us know which records you want? DO you want all of them?
To	From	DeletedIn	DeletedOut
jason	jason	0	0
jason	jason	1	0
jason	jason	0	1
jack	jason	0	0
jack	jason	1	0
jason	jack	0	0
jason	jack	0	1

Open in new window

0
 
LVL 1

Author Closing Comment

by:webressurs
ID: 39218373
This is the correct solution.
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 this article we will get to know that how can we recover deleted data if it happens accidently. We really can recover deleted rows if we know the time when data is deleted by using the transaction log.
This post looks at MongoDB and MySQL, and covers high-level MongoDB strengths, weaknesses, features, and uses from the perspective of an SQL user.
Via a live example combined with referencing Books Online, show some of the information that can be extracted from the Catalog Views in SQL Server.
Using examples as well as descriptions, and references to Books Online, show the documentation available for datatypes, explain the available data types and show how data can be passed into and out of variables.

689 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