我正在寻找从今天午夜到昨天午夜的数据。如果今天的日期是"2020-06-10 03:20:25"。我想在"2020-06-09 00:00:00"到"2020-06-10 00:00:00"之间创建
假设createdate
是timestamp
列:
where createdate >= date_trunc('day', current_timestamp) - interval '1 day'
and createdate < date_trunc('day', current_timestamp) + interval '1 day';
create table midnight_test(id int, createdate timestamptz);
insert into midnight_test values (1, '06/08/2020 17:15'), (2, '06/09/2020 00:00'), (3, '06/09/2020 13:25'), (4, '06/10/2020 00:00');
select * from midnight_test where createdate between '06/09/2020 00:00'::timestamptz and '06/10/2020 00:00'::timestamptz;
id | createdate
----+------------------------
2 | 2020-06-09 00:00:00-07
3 | 2020-06-09 13:25:00-07
4 | 2020-06-10 00:00:00-07
假设createdate
是数据类型timestamp
,它可以像这样简单:
WHERE createdate >= CURRENT_DATE - 1
AND createdate < CURRENT_DATE
CURRENT_DATE
返回当前date
。您可以添加/减去integer
值以添加/减去天数。
与timestamp
相比,date
被胁迫到当天的第一瞬间。所以date '2020-06-09'
等于timestamp '2020-06-09 00:00:00'
.
顺便说一句,BETWEEN
几乎总是时间戳的错误工具。看:
- 如何将日/夜指示器添加到时间戳列?