hi
I have got a table for "internet access" with user ID, it has 3 columns user ID, starttime and endtime, i want to make another column which will show how many mins or hours that user was logged in to the internet and also add the total time if the user logged in more than once. can anyone please help me...
thanks
kaz
Hi debasisdas,
i also have the same problem and have a mysql table with two columns 'purchases' and 'sales' and would like to have another column 'balance' which is the result of subtracting purchases from sales. I am newbie to MySQL, would you kindly explain more about the simple subtract?
I highly appreciate your help and anyone out there with good ideas.
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