title: How to lock out a field within a row after it has been updated SQL
body: <p>I am using SQl, ASP.net. I have a system which has multiple users. I have a search that searched for a client which will then display their specific information. I want to be able to update a field Eg: Final Mark for that client. I then do not want the user who updated it to be able to change it again. What would be the best way of doing this? Detailed answers would be great as I am new to this!</p>