1

如果我有一个像ID、IntrvalStartPoints、IntervalEndPoints
这样的表， 其中 StartPoints 包含间隔的开始，而 EndPoints 是间隔的结束。

例如：

ID: 1000
StartPoints: 94994731,94997876,94998645,95001520,95005812,95007092, ENDPoints: 94996152,94998036,94998824,95001720,95005924,95007413,

这里我们有 6 个区间 <94994731,94996152>, <94997876,94998036>, ...

我们可以编写一个查询来检查例如ID:1000、Start:95005812、End:95005815 是否与任何间隔重叠。

谢谢！

4

1 回答 1

2

以下是 BigQuery 标准 SQL 

#standardSQL
SELECT t.id, StartPoint, EndPoint, interval_start, interval_end
FROM (
  SELECT id, CAST(StartPoint AS INT64) StartPoint, CAST(EndPoint AS INT64) EndPoint
  FROM `project.dataset.intervals` t,
  UNNEST(SPLIT(StartPoints)) StartPoint WITH OFFSET pos1
  JOIN UNNEST(SPLIT(EndPoints)) EndPoint WITH OFFSET pos2
  ON pos1 = pos2
) t
JOIN `project.dataset.checks` c ON c.id = t.id AND 
(interval_start BETWEEN StartPoint AND EndPoint 
OR interval_end BETWEEN StartPoint AND EndPoint)

您可以使用来自您问题的虚拟数据来测试/玩它，如下所示 

#standardSQL
WITH `project.dataset.intervals` AS (
  SELECT 1000 id, 
    '94994731,94997876,94998645,95001520,95005812,95007092' StartPoints,
    '94996152,94998036,94998824,95001720,95005924,95007413' EndPoints
  UNION ALL
  SELECT 2000 id, 
    '74994731' StartPoints,
    '74996152' EndPoints
), `project.dataset.checks` AS (
  SELECT 1000 id, 95005812 interval_start, 95005815 interval_end
)
SELECT t.id, StartPoint, EndPoint, interval_start, interval_end
FROM (
  SELECT id, CAST(StartPoint AS INT64) StartPoint, CAST(EndPoint AS INT64) EndPoint
  FROM `project.dataset.intervals` t,
  UNNEST(SPLIT(StartPoints)) StartPoint WITH OFFSET pos1
  JOIN UNNEST(SPLIT(EndPoints)) EndPoint WITH OFFSET pos2
  ON pos1 = pos2
) t
JOIN `project.dataset.checks` c ON c.id = t.id AND 
(interval_start BETWEEN StartPoint AND EndPoint 
OR interval_end BETWEEN StartPoint AND EndPoint)

结果为 

Row id      StartPoint  EndPoint    interval_start  interval_end     
1   1000    95005812    95005924    95005812        95005815
于 2018-05-02T02:11:50.593 回答