Very simple procedurally (though not in SQL).
Here's the pseudo-code:
Execute:
SELECT * FROM Y WHERE U = 'me'
ORDER BY Y, X
$flag = "last_y" ; // flag indicating whether or not your
mysql_fetch_array() brings a new value of Y
Loop your query result {
if Y <> $flag['last_y'] {
// thi
I think you should first make a new datamodel, cause if I see this, it isn't
right
(just my 2 cents)
:-)
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I don't see an easy way to do this in one SQL statement. But, the
following PHP does the trick for me (assuming MySQL):
// get the list of Y values
$r = mysql_query( "SELECT * FROM table GROUP BY Y" );
while( $y_val = mysql_fetch_array( $r ) )
$y_vals[] = $y_val['Y'];
// For each Y, fetch
