这是我的初始表，（日期是DD / MM / YY格式）
ID DAY_INI DAY_END TYPE_ID TYPE NUM START_DATE END_DATE
---- --------- --------- ------- ---- ---- --------- ---------
4241 15/09/15 16/09/15 2 1 66 01/01/00 31/12/99
4241 17/09/15 18/09/15 9 1 59 17/09/15 18/09/15
4241 19/09/15 20/09/15 2 1 66 01/01/00 31/12/99
4241 15/09/15 15/09/15 3 2 63 01/01/00 31/12/99
4241 16/09/15 17/09/15 8 2 159 16/09/15 17/09/15
4241 18/09/15 20/09/15 3 2 63 01/01/00 31/12/99
2134 15/09/15 16/09/15 2 1 66 01/01/00 31/12/99
2134 17/09/15 18/09/15 9 1 59 17/09/15 18/09/15
2134 19/09/15 20/09/15 2 1 66 01/01/00 31/12/99
2134 15/09/15 15/09/15 3 2 63 01/01/00 31/12/99
2134 16/09/15 17/09/15 8 2 159 16/09/15 17/09/15
2134 18/09/15 20/09/15 3 2 63 01/01/00 31/12/99
我要创建具有初始DAY和结束DAY的组，以获得相同的ID和TYPE。
我不想白天分组，我需要在每次TYPE_ID更改时创建一个组，基于初始顺序（ID，TYPE，DAY ASC）
这是我想要实现的结果：
$this->element()你能否提供关于如何做到这一点的任何线索？谢谢！
答案 0 :(得分：0)
将枚举添加到原始数据集（使用Row_Number或rownum）。为每个组添加MIN（枚举）。然后按枚举对组进行排序。
答案 1 :(得分：0)
Oracle 11g R2架构设置：
CREATE TABLE TEST ( ID, DAY, TYPE_ID, TYPE, NUM, START_DATE, END_DATE ) AS
SELECT 4241, DATE '2015-09-15', 2, 1, 66, DATE '2000-01-01', DATE '1999-12-31' FROM DUAL
UNION ALL SELECT 4241, DATE '2015-09-16', 2, 1, 66, DATE '2000-01-01', DATE '1999-12-31' FROM DUAL
UNION ALL SELECT 4241, DATE '2015-09-17', 9, 1, 59, DATE '2015-09-17', DATE '2015-09-18' FROM DUAL
UNION ALL SELECT 4241, DATE '2015-09-18', 9, 1, 59, DATE '2015-09-17', DATE '2015-09-18' FROM DUAL
UNION ALL SELECT 4241, DATE '2015-09-19', 2, 1, 66, DATE '2000-01-01', DATE '1999-12-31' FROM DUAL
UNION ALL SELECT 4241, DATE '2015-09-20', 2, 1, 66, DATE '2000-01-01', DATE '1999-12-31' FROM DUAL
UNION ALL SELECT 4241, DATE '2015-09-15', 3, 2, 63, DATE '2000-01-01', DATE '1999-12-31' FROM DUAL
UNION ALL SELECT 4241, DATE '2015-09-16', 8, 2, 159, DATE '2015-09-16', DATE '2015-09-17' FROM DUAL
UNION ALL SELECT 4241, DATE '2015-09-17', 8, 2, 159, DATE '2015-09-16', DATE '2015-09-17' FROM DUAL
UNION ALL SELECT 4241, DATE '2015-09-18', 3, 2, 63, DATE '2000-01-01', DATE '1999-12-31' FROM DUAL
UNION ALL SELECT 4241, DATE '2015-09-19', 3, 2, 63, DATE '2000-01-01', DATE '1999-12-31' FROM DUAL
UNION ALL SELECT 4241, DATE '2015-09-20', 3, 2, 63, DATE '2000-01-01', DATE '1999-12-31' FROM DUAL
UNION ALL SELECT 2134, DATE '2015-09-15', 2, 1, 66, DATE '2000-01-01', DATE '1999-12-31' FROM DUAL
UNION ALL SELECT 2134, DATE '2015-09-16', 2, 1, 66, DATE '2000-01-01', DATE '1999-12-31' FROM DUAL
UNION ALL SELECT 2134, DATE '2015-09-17', 9, 1, 59, DATE '2015-09-17', DATE '2015-09-18' FROM DUAL
UNION ALL SELECT 2134, DATE '2015-09-18', 9, 1, 59, DATE '2015-09-17', DATE '2015-09-18' FROM DUAL
UNION ALL SELECT 2134, DATE '2015-09-19', 2, 1, 66, DATE '2000-01-01', DATE '1999-12-31' FROM DUAL
UNION ALL SELECT 2134, DATE '2015-09-20', 2, 1, 66, DATE '2000-01-01', DATE '1999-12-31' FROM DUAL
UNION ALL SELECT 2134, DATE '2015-09-15', 3, 2, 63, DATE '2000-01-01', DATE '1999-12-31' FROM DUAL
UNION ALL SELECT 2134, DATE '2015-09-16', 8, 2, 159, DATE '2015-09-16', DATE '2015-09-17' FROM DUAL
UNION ALL SELECT 2134, DATE '2015-09-17', 8, 2, 159, DATE '2015-09-16', DATE '2015-09-17' FROM DUAL
UNION ALL SELECT 2134, DATE '2015-09-18', 3, 2, 63, DATE '2000-01-01', DATE '1999-12-31' FROM DUAL
UNION ALL SELECT 2134, DATE '2015-09-19', 3, 2, 63, DATE '2000-01-01', DATE '1999-12-31' FROM DUAL
UNION ALL SELECT 2134, DATE '2015-09-20', 3, 2, 63, DATE '2000-01-01', DATE '1999-12-31' FROM DUAL
查询1 ：
WITH group_changes AS (
SELECT t.*,
CASE TYPE_ID WHEN LAG( TYPE_ID ) OVER ( PARTITION BY ID, TYPE ORDER BY DAY ) THEN 0 ELSE 1 END AS HAS_CHANGED_GROUP
FROM TEST t
),
groups AS (
SELECT ID, DAY, TYPE_ID, TYPE, NUM, START_DATE, END_DATE,
SUM( HAS_CHANGED_GROUP ) OVER ( PARTITION BY ID, TYPE ORDER BY DAY ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW ) AS GRP
FROM group_changes
)
SELECT ID,
MIN( DAY ) AS DAY_INI,
MAX( DAY ) AS DAY_END,
MIN( TYPE_ID ) AS TYPE_ID,
TYPE,
MIN( NUM ) AS NUM,
MIN( START_DATE ) AS START_DATE,
MIN( END_DATE ) AS END_DATE
FROM groups
GROUP BY ID, TYPE, GRP
<强> Results ：
| ID | DAY_INI | DAY_END | TYPE_ID | TYPE | NUM | START_DATE | END_DATE |
|------|-----------------------------|-----------------------------|---------|------|-----|-----------------------------|-----------------------------|
| 4241 | September, 17 2015 00:00:00 | September, 18 2015 00:00:00 | 9 | 1 | 59 | September, 17 2015 00:00:00 | September, 18 2015 00:00:00 |
| 2134 | September, 15 2015 00:00:00 | September, 15 2015 00:00:00 | 3 | 2 | 63 | January, 01 2000 00:00:00 | December, 31 1999 00:00:00 |
| 2134 | September, 18 2015 00:00:00 | September, 20 2015 00:00:00 | 3 | 2 | 63 | January, 01 2000 00:00:00 | December, 31 1999 00:00:00 |
| 4241 | September, 15 2015 00:00:00 | September, 16 2015 00:00:00 | 2 | 1 | 66 | January, 01 2000 00:00:00 | December, 31 1999 00:00:00 |
| 4241 | September, 19 2015 00:00:00 | September, 20 2015 00:00:00 | 2 | 1 | 66 | January, 01 2000 00:00:00 | December, 31 1999 00:00:00 |
| 4241 | September, 15 2015 00:00:00 | September, 15 2015 00:00:00 | 3 | 2 | 63 | January, 01 2000 00:00:00 | December, 31 1999 00:00:00 |
| 4241 | September, 16 2015 00:00:00 | September, 17 2015 00:00:00 | 8 | 2 | 159 | September, 16 2015 00:00:00 | September, 17 2015 00:00:00 |
| 2134 | September, 17 2015 00:00:00 | September, 18 2015 00:00:00 | 9 | 1 | 59 | September, 17 2015 00:00:00 | September, 18 2015 00:00:00 |
| 2134 | September, 15 2015 00:00:00 | September, 16 2015 00:00:00 | 2 | 1 | 66 | January, 01 2000 00:00:00 | December, 31 1999 00:00:00 |
| 2134 | September, 19 2015 00:00:00 | September, 20 2015 00:00:00 | 2 | 1 | 66 | January, 01 2000 00:00:00 | December, 31 1999 00:00:00 |
| 2134 | September, 16 2015 00:00:00 | September, 17 2015 00:00:00 | 8 | 2 | 159 | September, 16 2015 00:00:00 | September, 17 2015 00:00:00 |
| 4241 | September, 18 2015 00:00:00 | September, 20 2015 00:00:00 | 3 | 2 | 63 | January, 01 2000 00:00:00 | December, 31 1999 00:00:00 |