两个DateTime之间的Postgresql提取但只忽略秒

Question

两个DateTime之间的Postgresql提取，但只忽略秒（两个datetime = 00的秒）

06.09.2014 18:54:35   -  06.09.2014 18:54:35
DD.MM.YYYY HH24:MI    -  DD.MM.YYYY HH24:MI

Answer 1

听起来就像你正在寻找date_trunc（）函数一样。

with test_data as (
  select timestamp '2015-01-01 08:00:13' as ts union all
  select timestamp '2015-01-01 08:13:27'       union all
  select timestamp '2015-01-01 09:00:27'       union all
  select timestamp '2015-01-01 09:01:42' 
)
select *, date_trunc('minute', ts) 
from test_data
where date_trunc('minute', ts) between '2015-01-01 08:00' and '2015-01-01 09:00';

ts                    date_trunc
--
2015-01-01 08:00:13   2015-01-01 08:00:00
2015-01-01 08:13:27   2015-01-01 08:13:00
2015-01-01 09:00:27   2015-01-01 09:00:00

如果您需要此类查询来使用索引，则需要在表达式date_trunc('minute', your_column_name)上创建索引。