MYSQL cumulative sum by player -

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im having table players , scores. managed create query cumulative sum. want query group cumulative sum player, cumulative sum of previous players not included start cumulative sum of new player. example of result current query:

+--------+--------+-------+ | player | total  | cumul | +--------+--------+-------+ | arne   |     16 |    16 | | arne   |    -48 |   -32 | | arne   |     13 |   -19 | | arne   |    -17 |   -36 | | arne   |      7 |   -29 | | arne   |     41 |    12 | | arne   |    -30 |   -18 | | arne   |     -6 |   -24 | | arne   |     18 |    -6 | | bjorg  |     -5 |   -11 | | bjorg  |      9 |    -2 | | bjorg  |    -38 |   -40 | | bjorg  |    -12 |   -52 | | bjorg  |     11 |   -41 | | bjorg  |      3 |   -38 | +--------+--------+-------+

how should like:

 +--------+--------+-------+  | speler | total  | cumul |  +--------+--------+-------+  | arne   |     16 |    16 |  | arne   |    -48 |   -32 |  | arne   |     13 |   -19 |  | arne   |    -17 |   -36 |  | arne   |      7 |   -29 |  | arne   |     41 |    12 |  | arne   |    -30 |   -18 |  | arne   |     -6 |   -24 |  | arne   |     18 |    -6 |  | bjorg  |     -5 |    -5 |  | bjorg  |      9 |     4 |  | bjorg  |    -38 |   -34 |  | bjorg  |    -12 |   -46 |  | bjorg  |     11 |   -35 |  | bjorg  |      3 |   -32 |  +--------+--------+-------+

the problem first table second player uses cumul of previous player start from. how should alter query in order switch between players?

here's query:

select t.player,      t.total,      @running_total := @running_total + t.total cumul ( select player, id, sum(punten) total `whiteboard_games`  1 group player, id) t join (select @running_total := 0) table1 order t.player, id

thanks in advance!

try query 

select @score:=if(@prevplayer = player, @score+total, total) cumil, total, @prevplayer:=player player (select * tbl order player) join  (select @score:=0, @prevplayer:='')b

results:

| cumil | total | player | -------------------------- |    16 |    16 |   arne | |    34 |    18 |   arne | |    28 |    -6 |   arne | |    -2 |   -30 |   arne | |    39 |    41 |   arne | |    46 |     7 |   arne | |    29 |   -17 |   arne | |    42 |    13 |   arne | |    -6 |   -48 |   arne | |    11 |    11 |  bjorg | |    -1 |   -12 |  bjorg | |   -39 |   -38 |  bjorg | |   -30 |     9 |  bjorg | |   -35 |    -5 |  bjorg | |   -32 |     3 |  bjorg |

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