Do you have a really good reason to store a computed value? It's only useful
if you will perform a search on the column, else you could just do the
subtraction when you SELECT columns A and B.
On Sat, Aug 21, 2010 at 11:55 AM, <b@stripped> wrote:
> For simplicity's sake, let's say I have three fields, A, B and C, all
> of which are integers. I'd like the value of C to be equal to A less B
> (A-B). Is there a way I can perform this calculation? I'm guessing it
> would happen when I INSERT a row and specify the values for A and B.
> Feel free to direct me to the fine manual I should have read.
> Thank you.
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