mysql排序的问题与获取第几高的分数的信息

1：先截图看效果

2：完整的SQl语句

 SELECT * FROM studentscore;
 -- ------------------
 SET @maxscore=(SELECT MAX(score) FROM studentscore LIMIT );
   SELECT  MAX(A.score)score FROM studentscore A
 INNER join studentscore B  ON A.id=B.id
  AND A.score!=@maxscore LIMIT ;

 -- ----------------
  SELECT
  S.id,S.score,
 @myrow:=@myrow+  AS myrow
 FROM
 (SELECT id,score
 FROM studentscore
 ORDER BY score DESC) S,(SELECT @myrow:=)r ;

 -- ------------------
  SELECT
  S.id,S.score,
  (CASE WHEN
  @sameScore=S.score THEN @myrow WHEN @sameScore:=S.score THEN @myrow:=@myrow+ END) AS myrow
 FROM
 (SELECT id,score
 FROM studentscore
 ORDER BY score DESC) S,(
 SELECT @myrow:=,@sameScore:= NULL)r ;
 -- --------可以求N条----------
 SELECT * FROM(
 SELECT
  S.id,S.score,
  (CASE WHEN
  @sameScore=S.score THEN @myrow WHEN @sameScore:=S.score THEN @myrow:=@myrow+ END) AS myrow
 FROM
 (SELECT id,score
 FROM studentscore
 ORDER BY score DESC) S,(
 SELECT @myrow:=,@sameScore:= NULL)r
 ) qq
 WHERE myrow= -- 可以取 @N高的信息，具体看需求