Oracle - 将值从行转换为范围
是否有任何技术可以允许像这样的行集
WITH
base AS
(
SELECT 1 N FROM DUAL UNION ALL
SELECT 2 N FROM DUAL UNION ALL
SELECT 3 N FROM DUAL UNION ALL
SELECT 6 N FROM DUAL UNION ALL
SELECT 7 N FROM DUAL UNION ALL
SELECT 17 N FROM DUAL UNION ALL
SELECT 18 N FROM DUAL UNION ALL
SELECT 19 N FROM DUAL UNION ALL
SELECT 21 N FROM DUAL
)
SELECT a.N
FROM base a
产生结果
1 3
6 7
17 19
21 21
它实际上是行到范围操作。 我正在 Oracle Land 玩,非常感谢任何建议。
Are there any techniques that would allow a row set like this
WITH
base AS
(
SELECT 1 N FROM DUAL UNION ALL
SELECT 2 N FROM DUAL UNION ALL
SELECT 3 N FROM DUAL UNION ALL
SELECT 6 N FROM DUAL UNION ALL
SELECT 7 N FROM DUAL UNION ALL
SELECT 17 N FROM DUAL UNION ALL
SELECT 18 N FROM DUAL UNION ALL
SELECT 19 N FROM DUAL UNION ALL
SELECT 21 N FROM DUAL
)
SELECT a.N
FROM base a
to yield results
1 3
6 7
17 19
21 21
It is in effect a rows to ranges operation.
I'm playing in Oracle Land, and would appreciate any suggestions.
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我觉得这可能可以改进,但它有效:
I feel like this can probably be improved on, but it works:
另一种方式:
Another way:
还有另一种方式:
Yet another way: