http://blog.csdn.net/a56508820/article/details/49663069
select @rownum:=@rownum+1 AS rownum,A.* from
(
select *,sum(game_scores) as scores from tbl_rank_total_score where school='北京大学' GROUP BY uid order by scores desc
)A,(select @rownum:=0)B
-select @rownum:=@rownum-1 AS rownum,A.* from
(
select *,sum(game_scores) as scores from tbl_rank_total_score where school='北京大学' GROUP BY uid order by scores asc limit 0,10
)A,(select @rownum:=5)B
select @rownum:=@rownum-1 AS rownum,if(@scores=scores,@rank,@rank:=@rownum)as rank,A.* from
(
select *,sum(game_scores) as scores from tbl_rank_total_score where school='北京大学' GROUP BY uid order by scores asc
)A,(select @rank:=0,@rownum:=5,@scores:=null)B
--------------------------
select @rownum:=@rownum+1 AS rownum,if(@scores=scores,@rank,@rank:=@rownum)as rank,@scores:=scores,A.* from
(
select *,sum(game_scores) as scores from tbl_rank_total_score where school='北京大学' GROUP BY uid order by scores desc
)A,(select @rank:=0,@rownum:=0,@scores:=0)B
---------------------------------------
select @rownum:=@rownum+1 AS rownum,if(@scores=scores,@rank,@rank:=@rownum)as rank,@scores:=scores,A.* from
(
select *,sum(game_scores) as scores from tbl_rank_total_score where school='北京大学' GROUP BY uid order by scores desc
)A,(select @rank:=0,@rownum:=0,@scores:=0)B
排名为：
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5
-----------------------------------------
select @rownum:=@rownum+1 AS rownum,
if(@scores=scores,@rank,@rank:=@rank+1)as rank,
@scores:=scores,A.* from
(
select *,sum(game_scores) as scores from tbl_rank_total_score where school='北京大学' GROUP BY uid order by scores desc
)A,(select @rank:=0,@rownum:=0,@scores:=0)B
排名为：
1
2
3
3
4