Update query with Join

[Hu Qinan]

Dear all, 

Which records in tbl1 are to be updated are determined by an INNER JOIN with tbl2. I 
have tried the following:

UPDATE tbl1 INNER JOIN tbl2 ON tbl1.id = tbl2.id
SET tbl1.col1 = 0;

UPDATE tbl1, tbl2
SET tbl1.col1 = 0
WHERE tbl1.id = tbl2.id;

UPDATE tbl1
SET tbl1.col1 = 0
INNER JOIN tbl2 ON tbl1.id = tbl2.id;

But none of the above codes work. How to write this query?