Sql 如何在Oracle中查询列值的分布（按值范围分组）？

假设Oracle中有一个名为distance的表，其中有一个名为distance的浮点型列。距离的范围为[0，1000]。我想知道距离的分布，例如，以下每个范围中有多少行：0,10]、10,50]、50,100]、100,500]。。。5000，10000]

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如何构建此SQL查询？

使用派生表将每个距离放入其组中。然后分组并计数：

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请理想地显示表的完整定义，因为create table sql工作正常。还有一个问题，如果我想同时知道每个组的百分比呢？我不是Oracle用户，但我认为他们在这方面有很好的功能。无论如何，在ANSI SQL中，只需将count 100.0/select count*从距离添加到选择列表中即可。

select dist_group, count(*)
from
(
 select case when distance between 0  and 10 then '(0, 10)'
             when distance between 10 and 50 then '(10, 50)'
             ...
             when distance between 5000 and 10000 then '(5000, 10000)' end as dist_group
 from distances
)
group by dist_group

SELECT COUNT( CASE WHEN   0 <= distance AND distance <=   10 THEN distance END ) AS in_range_0_10,
       COUNT( CASE WHEN  10 <  distance AND distance <=   50 THEN distance END ) AS in_range_10_50,
       COUNT( CASE WHEN  50 <  distance AND distance <=  100 THEN distance END ) AS in_range_50_100,
       COUNT( CASE WHEN 100 <  distance AND distance <=  500 THEN distance END ) AS in_range_100_500,
       COUNT( CASE WHEN 500 <  distance AND distance <= 1000 THEN distance END ) AS in_range_500_1000
FROM   Distance;