SQL query for subtraction?

Question

MySQL

Hello!
Tell me, plz, on a simple sql query for mysql?
The table has two fields (timestamp) and you need to select rows where one field is 1 more than the other.
It should be something simple, but it doesn't work ;)

Answer 1

WHERE `timestamp2` = `timestamp1`+1

Answer 2

...
where (timestamp1-timestamp2) = 1

not knowing MySQL - subtraction operation may be different