postgresql - 计算当前月份的数据 - 不是 30 天前 Postgres 语句

Question

我这个查询返回从当前日期起 30 天的数据，需要修改它以仅返回当前月份的数据，而不是从当前日期起 30 天

SELECT count(1) AS counter FROM users.logged WHERE createddate >= date_trunc('month', CURRENT_DATE);

基于 Postgres 如何调整此查询的任何提示

问候

Answer 1

像这样的东西应该工作。

SELECT count(1) AS counter
FROM users.logged
WHERE date_trunc('month', createddate) = date_trunc('month', current_date);

Answer 2

它已经应该返回当月的值。截断进行转换10 Nov 2013 14:16 -> 01 Nov 2013 00:00，它将返回本月初以来的数据。问题似乎是别的。

Answer 3

Ive this query which return data for 30 days from current date , need to modify it to return data for current month only not 30 days from current date

That's incorrect. Your query:

SELECT count(1) AS counter FROM users.logged WHERE createddate >= date_trunc('month', CURRENT_DATE);

returns all dates >= Nov 1st 00:00:00, in other words what you say that you want already. Or then, you've simplified your query and left out the more important bits — those that are broken. If not:

It might be that you've dates in the future and that you're getting incorrect counts as a result. If so, add an additional criteria in the where clause:

AND created_date < date_trunc('month', CURRENT_DATE) + interval '1 month'

It might also be that your sample data has a bizarre row with a time zone such that it looks like the timestamp is from this month but the date/time arithmetics land it last month.

Answer 4

这只会为您提供当月的数据。我尝试提取month和year. 最后一步是您可以将创建日期与当前日期时间进行比较。

SELECT count(1) AS counter 
FROM users.logged 
WHERE 
    EXTRACT(MONTH FROM createddate) = EXTRACT(MONTH FROM current_date)
    AND EXTRACT(YEAR FROM createddate) = EXTRACT(YEAR FROM current_date);