> Here is some pseudocode.
>
> P0 = 2;
> foreach loop {
> read next row from returned mysql query resource
> get P and time from this row
> if (P != P0) {
> P0 = P;
> output time and P
> }
>
> }
I'm using this solution, but on the client side.
If the connection is over the internet, this is
a very long way to get results.