How to check for missing records in MySQL?

Question

MySQL

Hello.
There is a list of values. Of these, some are present in the table and some are not. How can I find out which values ​​are missing in the table?

Answer 1

SELECT * FROM t1 WHERE NOT EXISTS (SELECT * FROM t2 where t1.id = t2.id);

Answer 2

Select values ​​that are not in the table