I have solved it, thanks to you, you're the best. Thanks to you, you're the best. thank, thank much.

Hi, sorry, I do not speak English well, I already verified that the query works, but without using the "TIMESTAMPDIFF ..."I am not sure if it is because I am using wrong the TIMESTAMPDIFF, can you explain me how to use this function in the right way? thank you

Hi, thanks for answering my friend, and for your time. Now If I want to prove that the query actually does, should I store a value as a variable in $fieldname and $fieldvalue? for example: $fieldname = '111'... Thanks.

@czerspalace Hi, It is a mistake I made, the thought that has to call the field of a table that way. haha