troubleshooting Question

SQL query help

Avatar of Mani Pazhana
Mani PazhanaFlag for United States of America asked on
Microsoft SQL ServerMicrosoft SQL Server 2005Microsoft SQL Server 2008
13 Comments1 Solution526 ViewsLast Modified:
I have this SQL query:

Select       
      TR.Serial_Number,      
      MAX(CASE
        WHEN (TR.Test_Result LIKE '%PASS%' ) THEN  'Pass'
        ELSE ''      
      END)  as 'ChamberResults',
      MIN(TR.Date_Time) as 'ChamberDate'
FROM
      dbo.Test_Results TR WITH (NOLOCK)  
WHERE       
      (TR.Date_Time BETWEEN '2013-12-23 00:32:35.757' AND '2013-12-23 23:32:35.757')       
      AND (ISNULL(TR.Serial_Number,'')<>'') AND LEN(TR.Serial_Number) > = 14
      AND (System_ID LIKE '%Chamber%')       
Group By
      TR.Serial_Number



I want to modify the above query to pick only  the first unique serial_number based on the Date_Time ascending and do CASE statement check on the first serial_number...


For e.g: C037197 2089 13 appears 3 times , but I need the first row to evaluate CASE statement..ignore the other 2 rows...



Input Data is attached..

Any idea?

Thanks
Capture.PNG
ASKER CERTIFIED SOLUTION
Surendra Nath
Technology Lead

Our community of experts have been thoroughly vetted for their expertise and industry experience.

Join our community to see this answer!
Unlock 1 Answer and 13 Comments.
Start Free Trial
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 13 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros