Question

When the authentication code in the Tuser is not null it means the users didnt login the site within 24 hours so i have to delete the rows.

Here is the query which I wrote but it is not deleting correctly

 DELETE FROM tusers WHERE auth_code IS NOT NULL 
AND auth_code !=''
AND STR_TO_DATE(NOW(),'%Y-%m-%d %T')
> (DATE_SUB(STR_TO_DATE(created_date,'%Y-%m-%d  %T'),INTERVAL -1 DAY))

Answer 1

I got the perfect delete which is working perfectly:

  DELETE FROM tusers WHERE auth_code IS NOT NULL AND auth_code !=''
 AND DATE_SUB(NOW() , INTERVAL 24 HOUR) > STR_TO_DATE(created_date,'%Y-%m-%d %T');

This query deletes the rows by comparing the current date of the system with the created date of the rows which reaches above 24 hours of the current date.