您好我需要将两个表与间隔日期相交
时间轴1
start | end
---------------------------------------------
2016-12-19 08:00:00 | 2016-12-19 08:30:00
2016-12-19 09:30:00 | 2016-12-19 11:00:00
时间轴2
start | end
---------------------------------------------
2016-12-19 08:30:00 | 2016-12-19 10:00:00
2016-12-19 10:30:00 | 2016-12-19 11:00:00
这是我尝试的SQL:
SELECT * FROM start, end FROM timeline1
INTERSECT
SELECT * FROM start, end FROM timeline2
需要这样的结果:
总计:00:60:00
使用范围运算符*和&&:
select tsrange(t1."start", t1."end") * tsrange(t2."start", t2."end") as "intersections"
from timeline1 t1
join timeline2 t2
on tsrange(t1."start", t1."end") && tsrange(t2."start", t2."end");
intersections
-----------------------------------------------
["2016-12-19 09:30:00","2016-12-19 10:00:00")
["2016-12-19 10:30:00","2016-12-19 11:00:00")
(2 rows)
间隔总和:
select sum(upper("intersections")- lower("intersections")) as total
from (
select tsrange(t1."start", t1."end") * tsrange(t2."start", t2."end") as "intersections"
from timeline1 t1
join timeline2 t2
on tsrange(t1."start", t1."end") && tsrange(t2."start", t2."end")
) s
total
----------
01:00:00
(1 row)
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