Question

我正在尝试编写一个查询，该查询仅返回日期时间为 当月的第01天和当天的行。但我不确定是否可以做到。所以，我知道函数NOW()给了我当前的DATETIME ，但我仍然不知道如何自动获取BETWEEN的另一端应用程序，我不想让用户输入日期时间。

Ex：我想要您咨询当月的所有订单。

Select * from orders where date between (the function I am looking for) and NOW();

Answer 1

select * from table_name 
where (date between  DATE_ADD(LAST_DAY(DATE_SUB(CURDATE(), interval 30 day), interval 1 day) AND CURDATE() )

或你的方法..

select * from table_name 
where (date between  DATE_FORMAT(NOW() ,'%Y-%m-01') AND NOW() )

或者您也可以这样做

select * from table_name 
where `date` between curdate() - dayofmonth(curdate()) + 1
                 and curdate()

Answer 2

这更好地使用索引（如果有的话）

DECLARE @iniDate DATE
DECLARE @endDate DATE

SET @endDate = curdate()
SET @iniDate = @endDate - dayofmonth(@endDate) + 1

SELECT *
FROM My_table
WHERE `My_date` BETWEEN @iniDate AND @endDate

MySQL选择DATETIME BETWEEN

2 个答案: