sql: select not in

Question

how can I rewrite the following query using JOIN

SELECT * 
FROM table1 
WHERE id NOT IN 
( 
    SELECT t1Id 
    FROM table2 
);

Answer 1

SELECT * 
FROM table1 t1
left outer join table2 t2 on t1.id=t2.id
where t2.id is null

Answer 2

       SELECT * FROM table1 t1
       WHERE NOT EXISTS( 
        SELECT *
        FROM table2 t2 
        Where t1.Id = t2.t1Id);