Facing problem Increamenting by one in Sql Server Field whose data type in character

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I have data base field intr_prod_id char(10) Now i want to generate the Primary key like IP-1. After 1P-10 it will not increamenting.
I write the Query for this above id Generation IP-10. It will increaming upto 10 after that it will not increamenting

SQL

Select isnull(max(substring(intr_prod_id,4,50)),0)+1 From InterimProducts

Posted 26-Dec-11 18:29pm

waqar ahmad (Dev)

Updated 26-Dec-11 20:06pm

v4

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milannaughty 27-Dec-11 1:11am

Can you please describe your question.

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Om Prakash Pant · Answer 1 · 2011-12-26T18:55:00

Try This:

SQL

DECLARE @tbl TABLE ( StaffNumber varchar(10) )
INSERT INTO @tbl VALUES ( 'IP-1' )
INSERT INTO @tbl VALUES ( 'IP-9' )

SELECT TOP 1
CASE WHEN ISNUMERIC(SUBSTRING(StaffNumber,PATINDEX('%[0-9]%',StaffNumber),LEN(StaffNumber)))= 1 THEN
REPLACE
(
StaffNumber,
SUBSTRING(StaffNumber,PATINDEX('%[0-9]%',StaffNumber),LEN(StaffNumber)),
SUBSTRING(StaffNumber,PATINDEX('%[0-9]%',StaffNumber),LEN(StaffNumber))+1
)
ELSE
StaffNumber + '1' END AS NewstaffNumber,
SUBSTRING(StaffNumber,PATINDEX('%[0-9]%',StaffNumber),LEN(StaffNumber))+1
FROM @tbl ORDER by 2 desc

More Info:

http://archive.msdn.microsoft.com/SQLExamples/Wiki/View.aspx?title=IncrementAlphaNumericValues[^]