id      pid      gid        money       time
1 1 1 30.00 2012-04-07 21:25:06.810
2 2 1 80.00 2012-04-07 00:00:00.000
3 3 1 60.00 2012-04-07 00:00:00.000
4 4 1 120.00 2012-04-07 00:00:00.000
5 5 5 110.00 2012-04-07 00:00:00.000
6 6 6 200.00 2012-04-07 00:00:00.000如何得到如下结果
id      pid      gid        money       time
1 1 1 290.00 2012-04-07 21:25:06.810
2 2 1 80.00 2012-04-07 00:00:00.000
3 3 1 60.00 2012-04-07 00:00:00.000
4 4 1 120.00 2012-04-07 00:00:00.000
5 5 5 110.00 2012-04-07 00:00:00.000
6 6 6 200.00 2012-04-07 00:00:00.000