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Using CASE Condition for Prefixing a field from a table


Using CASE Condition for Prefixing a field from a table

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mynkdby
mynkdby
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Hi All,
I want to retain the same Employee Code when an employee is rehired and prefix with A,B,C based on no of times the employee has been rehired with CASE statement

CASE WHEN LEFT(EMPLOYEECODE,1) = 'Z' THEN 'A'+EMPLOYEECODE ELSE CASE WHEN ISNUMERIC(LEFT(EMPLOYEECODE,1)) = 1 THEN 'A'+EMPLOYEECODE ELSE CHAR(ASCII(LEFT(EMPLOYEECODE,1))+1)+SUBSTRING(EMPLOYEECODE,2,99) END END

and it is working fine with these parameters : Employee Code is 'A10010' then its returning B10010 and when it is 10010 it is returning A10010 which is correct but the challenge comes when the employee code is Z10010 then it should return AA10010 not AZ10010 ....how can i do that?? help
Keith Tate
Keith Tate
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This will depend on the number of levels you want to go with this, but this should accomplish what you wanted:

CASE 
when PATINDEX('%Z%',EmployeeCode) > 0 then REPLICATE('A',PATINDEX('%[0-9]%',EmployeeCode)) + SUBSTRING(EMPLOYEECODE,PATINDEX('%[0-9]%',EmployeeCode),99)
WHEN ISNUMERIC(LEFT(EMPLOYEECODE,1)) = 1 THEN 'A'+EMPLOYEECODE
ELSE CHAR(ASCII(LEFT(EMPLOYEECODE,1))+1)+SUBSTRING(EMPLOYEECODE,2,99)
END





Microsoft Certified Master - SQL Server 2008
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John Mitchell-245523
John Mitchell-245523
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Another way to do it is to create a RehireCode table with (1,A), (2,B), ... , (27,AA), (28, AB), ... and join to that.

27 is an awful lot of times for an employee to be hired by the same company!

John
mynkdby
mynkdby
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thanx keith that was a help
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