如何获取今天午夜到昨天午夜的数据

Question

I am looking for data from today's midnight to yesterday's midnight. If today's date "2020-06-10 03:20:25". I want createdate between "2020-06-09 00:00:00" TO "2020-06-10 00:00:00"

Answer 1

Assuming createdate is a timestamp column:

where createdate >= date_trunc('day', current_timestamp) - interval '1 day'
  and createdate < date_trunc('day', current_timestamp) + interval '1 day';

Answer 2

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

Answer 3

Assuming createdate is data type timestamp , it can be as simple as:

WHERE createdate >= CURRENT_DATE - 1
AND   createdate <  CURRENT_DATE

CURRENT_DATE returns the current date . You can add / subtract integer values to add / subtract days.

When compared to a timestamp , date is coerced to the first instant of that day. So date '2020-06-09' equals timestamp '2020-06-09 00:00:00' .

BTW, BETWEEN is almost always the wrong tool for timestamps. See:

• How to add a day/night indicator to a timestamp column?