How do I exclude values in a Column in select from a table

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Dear Sir,
The values in a table are

P124,P125,9871780998,P126,BPPQ,P127,PBNN ;

A query is:

SQL

select top 1 PatCode
from Patient_Detail
where PatCode  like 'P%'
order by PatID desc

Purpose is to select P127, but it is PBNN. It generate error [reason P+127(numeric)], so please modify the query to exclude PBNN and result is P127.

Posted 8-Sep-15 1:39am

LebneizTech

Updated 8-Sep-15 1:56am

Maciej Los

v2

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Maciej Los 8-Sep-15 7:57am

Does PatCode is used to store comma separated data?

LebneizTech 8-Sep-15 8:53am

NO

Michael_Davies 8-Sep-15 8:36am

If I get the question right then try:

select top 1 PatCode
from Patient_Detail
where PatCode like '%P127%' AND patcode NOT like '%PBNN%'
order by PatID desc

Not certain of the question as can not see your schema can only guess.

LebneizTech 8-Sep-15 8:53am

The Values in cloumn is not fix, it may P127,PA127,P128,P129,PADV122 ......
but by mistake it may be PA127,PADV122, etc it generate error, so I require to pick P129 in this case.

Maciej Los 8-Sep-15 10:25am

What kind of error message? I don't get you...

Michael_Davies 8-Sep-15 11:01am

Then either set the '%P127%' to '%P129%' or alter the WHERE to :

WHERE PatCode NOT like '%PBNN%'

That will get everything that does not contain PBNN regardless.

ZurdoDev 8-Sep-15 10:13am

Are you saying you want the PatCode that has the largest number in it?

LebneizTech 9-Sep-15 7:25am

yes, I got the Solution 1 from lmaycock980 can see.

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lmaycock · Accepted Answer · 2015-09-08T04:08:00

Solution 1

How about:

SQL

SELECT top 1 PatCode 
FROM Patient_Detail 
WHERE PatCode LIKE 'P%'
AND ISNUMERIC(SUBSTRING(PatCode, 2,LEN(PatCode)-1))=1
ORDER BY PatID DESC

?

Posted 8-Sep-15 4:08am

lmaycock

Comments

LebneizTech 9-Sep-15 7:13am

Thanks a lot, it is working fine.