# Oracle上的条件SUM

``````A | 3 | 3
B | 7 | 10
C | 6 | 16  -- ====
D | 5 | 5
E | 9 | 14
F | 3 | 17  -- ====
G | 8 | 8
``````

``````-- "test_data" is just a substitute for your real table, which I don't have
-- it is just so people without your table can run this example and would
-- not be part of your real solution.
with test_data ( sort_col, addend ) as
( SELECT 'A', 3 FROM DUAL UNION ALL
SELECT 'B', 7 FROM DUAL UNION ALL
SELECT 'C', 6 FROM DUAL UNION ALL
SELECT 'D', 5 FROM DUAL UNION ALL
SELECT 'E', 9 FROM DUAL UNION ALL
SELECT 'F', 3 FROM DUAL UNION ALL
SELECT 'G', 8 FROM DUAL ),
-- Solution begins here
sorted_inputs ( sort_col, sort_order, addend, running_sum_max_15) as
( SELECT sort_col, row_number() over ( order by sort_col ) sort_order, addend, 0 from test_data )
from sorted_inputs
model
dimension by (sort_order)
measures ( sort_col, addend, running_sum_max_15 )
rules update
running_sum_max_15[sort_order>1] =
case when running_sum_max_15[CV(sort_order)-1] < 15 THEN
)
``````

### 结果

``````+----------+--------+--------------------+
| SORT_COL | ADDEND | RUNNING_SUM_MAX_15 |
+----------+--------+--------------------+
| A        |      3 |                  3 |
| B        |      7 |                 10 |
| C        |      6 |                 16 |
| D        |      5 |                  5 |
| E        |      9 |                 14 |
| F        |      3 |                 17 |
| G        |      8 |                  8 |
+----------+--------+--------------------+
``````

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