57. DATEDIFF Function in SQL

How to get it all "Years, Month, Days" at once..

I appreciate the way you explain

how do i select all records that have an event datetime witin 1 hour before, for example mysql select all that time_diff less than 1 hour from datetime? its for a reminder email i want to make on a cronjob can you help with this sql query?

Thanks!

Nice explanation!