Sql 查找给定年份和月份之间的日期范围

我的日期范围如下表所示：

create table stf
(
    d1 date,
    d2 date
);

insert into stf values
('2020-01-01','2020-12-31'),
('2020-11-25','2020-11-25'),
('2019-01-01','2020-11-29'),
('2020-11-01','2021-01-06'),
('2019-01-23','2021-06-06'),
('2019-01-20','2019-12-30');

我正在寻找的日期范围是当前日期的月份和年份之间

预期结果应为：对于当前日期

d1      d2
--------------------------
2020-01-01  2020-12-31
2019-01-01  2020-11-29
2020-11-01  2021-01-06
2019-01-23  2021-06-06
2020-11-25  2020-11-25

注意：

2020-11

将介于上述范围之间

尝试1：

select * 
from stf
where to_char(now(),'YYYY-MM') between to_char(d1,'YYYY-MM') and to_char(d2,'YYYY-MM');

select * 
from stf
where ((date_part('month',now()) between date_part('month',d1) and date_part('month',d2))or date_part('year',now()) between date_part('year',d1) and date_part('year',d2))

输出：

d1      d2
--------------------------
2020-01-01  2020-12-31
2020-11-25  2020-11-25
2019-01-01  2020-11-29
2020-11-01  2021-01-06
2019-01-23  2021-06-06

d1      d2
--------------------------
2020-01-01  2020-12-31
2020-11-25  2020-11-25
2019-01-01  2020-11-29
2020-11-01  2021-01-06
2019-01-23  2021-06-06

试试2：

select * 
from stf
where to_char(now(),'YYYY-MM') between to_char(d1,'YYYY-MM') and to_char(d2,'YYYY-MM');

select * 
from stf
where ((date_part('month',now()) between date_part('month',d1) and date_part('month',d2))or date_part('year',now()) between date_part('year',d1) and date_part('year',d2))

输出：

d1      d2
--------------------------
2020-01-01  2020-12-31
2020-11-25  2020-11-25
2019-01-01  2020-11-29
2020-11-01  2021-01-06
2019-01-23  2021-06-06

d1      d2
--------------------------
2020-01-01  2020-12-31
2020-11-25  2020-11-25
2019-01-01  2020-11-29
2020-11-01  2021-01-06
2019-01-23  2021-06-06

---

您只需检查当前月初是否属于以下范围：

select *
from stf
where date_trunc('month', current_date) between d1 and d2

---

缺少此范围

2020-11-25 2020-11-25

。对不起，我的不好，没有在预期结果中提到。现在编辑。我想这应该可以

to_char（now（），'YYYYMM'）介于to_char（d1，'YYYYMM'）和to_char（d2，'yyyyymm'）之间。

对吗？@MAK:是的。或者是介于日期（月份，d1）和日期（月份，d2）之间的日期（月份，当前日期）