sql update a table with join code example

Example 1: update with join

UPDATE
        first_table ft
        JOIN second_table st ON st.some_id = ft.some_id
        JOIN third_table tt  ON tt.some_id = st.some_id
        .....
    SET
        ft.some_column = some_value
    WHERE ft.some_column = 123456 AND st.some_column = 123456

Example 2: joins in update query

update a
join b 
on a.a_id=b.b_id 
set b.is_active = 1 
where ....;