我想在一列中显示所有值。我该怎么做?
数据如下所示:
-----------------------------------------------
| user_id | degree_fi | degree_en | degree_sv |
-----------------------------------------------
| 3601464 | 3700 | 1600 | 2200 |
| 1020 | 100 | 0 | 0 |
| 3600520 | 100 | 1300 | 1400 |
| 3600882 | 0 | 100 | 200 |
| 3600520 | 3200 | 800 | 600 |
| 3600520 | 400 | 3000 | 1500 |
-----------------------------------------------
我想要的是这样的:
-------------------------------------------------------------
| user_id | degree_fi | degree_en | degree_sv |
--------------------------------------------------------------
| 3601464 | 3700 | 1600 | 2200 |
| 1020 | 100 | 0 | 0 |
| 3600520 | 100,3200,400 | 1300, 800, 3000 | 1400, 600, 1500 |
| 3600882 | 0 | 100 | 200 |
--------------------------------------------------------------
如您所见,3600520 的值不仅在一组中,而且也在一列中。我该怎么做?
提前致谢
create table USER_MULTI_DEGREE
(
USER_ID INTEGER not null,
DEGREE_FI VARCHAR2(128),
DEGREE_EN VARCHAR2(128),
DEGREE_SV VARCHAR2(128)
);
insert into USER_MULTI_DEGREE (USER_ID, DEGREE_FI, DEGREE_EN, DEGREE_SV) values (3601464, '3700', '1600', '2200');
insert into USER_MULTI_DEGREE (USER_ID, DEGREE_FI, DEGREE_EN, DEGREE_SV) values (1020, '100', '0', '0');
insert into USER_MULTI_DEGREE (USER_ID, DEGREE_FI, DEGREE_EN, DEGREE_SV) values (3600520, '100', '1300', '1400');
insert into USER_MULTI_DEGREE (USER_ID, DEGREE_FI, DEGREE_EN, DEGREE_SV) values (3600882, '0', '100', '200');
insert into USER_MULTI_DEGREE (USER_ID, DEGREE_FI, DEGREE_EN, DEGREE_SV) values (3600520, '3200', '800', '600');
insert into USER_MULTI_DEGREE (USER_ID, DEGREE_FI, DEGREE_EN, DEGREE_SV) values (3600520, '400', '3000', '1500');