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Stefan MotzFlag for United States of America

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Prevent inserting duplicate values in SQL Server database

Hi Experts,
I'm using the following code to insert values in my table:
INSERT INTO OT_Table (OT_Line, Emp_Id, Timestamp) VALUES ('"& strOT_Line &"','"& strEmp_Id &"','"& strTimeStamp &"')

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I would like to prevent insertion if the OT_Line and Emp_Id are the same.
In that case I would just like to update the value of the TimeStamp field.

How can I accomplish that on my classic ASP page?
Thank you for your help
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Daniel Van Der Werken
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Kyle Abrahams, PMP
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Stefan Motz
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Thank you very much; it's working now. This is classic ASP so I've used the following code:

IF NOT EXISTS(SELECT * FROM OTEWR WHERE OT_Line = '"& strOT_Line &"' AND Emp_Id  = '"& strEmp_Id &"' ) BEGIN INSERT INTO OTEWR(OT_Line, Emp_Id, PersonAddedOn) VALUES ('"& strOT_Line &"', '"& strEmp_Id &"', '"& strPersonAddedOn &"') END