Delete from a table when not in 2 other tables

hihi,
Have problem deleting from a table when "no" is not found in 2 other tables.
Delete table cant use alias like tbOne a
Delete from tbCost1 where Not EXISTS (select * from tbCost2 a Inner Join tbCost3 b where a.no='222' and b.no='222') and no='222'
neither is this working:
Delete from t1 a left join t2 b on t2.no=t1.no
left join t3 c on t3.no=t1.no where a.no='222'
and b.no is null and c.no is null

Melon,
Frank is given your answer.
Thank you,
Sandy.

Thank you and it works =)