Does addition exist in SQL?

Question

PHP

In the mysql database cell, there is a value of 10. In php, this is select then +1 then update. It will become 11.
Question: is it possible to add the required value purely on sql, or at least make +1?
Google led only to SUM www.sql.ru/docs/sql/u_sql/ch6.shtml but it adds up all the values ​​in a column, which is not it.

Answer 1

This is?
UPDATE tablename SET val = val + 1 WHERE .....

Answer 2

Google did not lead to the manual on mysql?