Does This Call For A Cursor? How?

Hi, sorry I am kind of stuck how to do this correctly.
The following is my problem statement:

There are three tables: TAB1 TAB2 TAB3

There is a 1 to many relationship between TAB2 and TAB1.

For every row in TAB2 that has a match in TAB1, they are related via
TAB2.col3 = TAB1.col2

I want to delete all those rows in both tables that match, but I have to
delete those rows in TAB1 first because of dependency constraints.
The primary key for TAB2.col1

Therefore I need to have a select block first and store it somewhere(?)

select
TAB2.col1
from
TAB2
where
TAB2.col3 IN
(select
TAB1.col2
from
TAB1
where
TAB1.col1 IN
(select
TAB3.col1
from
TAB3))



Then I delete all those rows in TAB1 that has a match in TAB3

delete from TAB1
where
TAB1.col1 IN
(select
TAB3.col1
from
TAB3))

now i delete those rows in TAB2 from the result set of the first sql block.

thanks for any help.