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How to assign Unique key?

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  • 5 weeks later...
I am new to this as well but I will try to answer the question.
set one field as a unique key in the database and then create the unique key on the client. Example, I need to keep track of applications that people fill out. I require them to enter their email address and use that as part of the unique key. I then concatenate the email address with a date and time stamp. I use this as a reference for that person. The likely hood of someone with the same email address filling out the form at the exact same time and second is highly unlikely.

Now this is different from a primary key.

hope this helps.
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  • 2 weeks later...
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