请教高难度的SQL查询。
请选出每个班级的前三名的学号和总分数，
记录如下:
学号 班级 英语 语文 总分
11-19888521
21-19586500
31-29477512
41-47571491
51-28181490
61-19191580
1231-28677498
2341-17678412
1451-36971408
1621-36981428
1411-58080488

结果如：
班级　　　学号　　　总分　　名次
1-1 6 580 1
1-1 1 521 2
1-1 2 500 3
1-2 3 512 1
1-2 5 490 2
1-2 234 485 3
1-3 123 498 1
1-3 162 428 1


表结构如下：
create table TBL_SCORE
(
FID NUMBER not null,
FCLASSID VARCHAR2(16),
CHINESE_SCORE NUMBER,
ENGLISH_SCORE NUMBER,
SUM_SCORE NUMBER
);
insert into TBL_SCORE (FID, FCLASSID, CHINESE_SCORE, ENGLISH_SCORE, SUM_SCORE)
values (1, '1-1 ', 98, 88, 521);
insert into TBL_SCORE (FID, FCLASSID, CHINESE_SCORE, ENGLISH_SCORE, SUM_SCORE)
values (2, '1-1 ', 95, 86, 500);
insert into TBL_SCORE (FID, FCLASSID, CHINESE_SCORE, ENGLISH_SCORE, SUM_SCORE)
values (3, '1-2 ', 94, 77, 512);
insert into TBL_SCORE (FID, FCLASSID, CHINESE_SCORE, ENGLISH_SCORE, SUM_SCORE)
values (4, '1-4 ', 75, 71, 491);
insert into TBL_SCORE (FID, FCLASSID, CHINESE_SCORE, ENGLISH_SCORE, SUM_SCORE)
values (5, '1-2 ', 81, 81, 490);
insert into TBL_SCORE (FID, FCLASSID, CHINESE_SCORE, ENGLISH_SCORE, SUM_SCORE)
values (6, '1-1 ', 91, 91, 580);
insert into TBL_SCORE (FID, FCLASSID, CHINESE_SCORE, ENGLISH_SCORE, SUM_SCORE)

values (123, '1-2 ', 86, 77, 498);
insert into TBL_SCORE (FID, FCLASSID, CHINESE_SCORE, ENGLISH_SCORE, SUM_SCORE)
values (234, '1-1 ', 76, 78, 412);
insert into TBL_SCORE (FID, FCLASSID, CHINESE_SCORE, ENGLISH_SCORE, SUM_SCORE)
values (145, '1-3 ', 69, 71, 408);
insert into TBL_SCORE (FID, FCLASSID, CHINESE_SCORE, ENGLISH_SCORE, SUM_SCORE)
values (162, '1-3 ', 69, 81, 428);
insert into TBL_SCORE (FID, FCLASSID, CHINESE_SCORE, ENGLISH_SCORE, SUM_SCORE)
values (141, '1-5 ', 80, 80, 488);

[解决办法]
不好意思,太匆忙了
select 中的字段缺少了 SUM_SCORE,楼主自己加上就可以了