获取MySQL中两个日期之间的差异天数

Question

I'm trying to get the inactive users for the last 30 days. by that i did this query:

SELECT * FROM users WHERE (30 - lastlogin) > 30

However I'm not getting any value, i wanted to see who are the users that did not loggin for the last 30 days. The date of the last login is like that in the database:

DD/MM/YYYY

Answer 1

SELECT * 
FROM users 
WHERE DATEDIFF(NOW(), str_to_date(`lastlogin`, '%d/%m/%Y')) > 30

Hope this helps.

Answer 2

try use between constraction, for MySql must work follows:

select *
from users
where lastlogin between date_sub(now(), interval 30 day) and now();

See also: how to subtrack 30 days from the current datetime in mysql