INNER JOIN ON vs WHERE clause

For simplicity, assume all relevant fields are NOT NULL. You can do: SELECT table1.this, table2.that, table2.somethingelse FROM table1, table2 WHERE table1.foreignkey = table2.primarykey AND (some other conditions) Or else: SELECT table1.this, table2.that, table2.somethingelse FROM table1 INNER JOIN table2 ON table1.foreignkey = table2.primarykey WHERE (some other conditions) Do these two work on