InnoDB Lockings

[Leonardo Carreira ☼]

Hello Friends..

i have a question..
i uses InnoDB Storage engine on MySQL v5.0.81..
i want to use Row Level locking..

if i just want to update/delete some table..
do i have to write "Select.. FOR UPDATE" also?..

example like this : (update data)
START Transaction;
Select * From MyTable FOR UPDATE;
Update MyTable set MyColumn=NewValue;
COmmit;

(delete data)
START Transaction;
Select * From MyTable FOR UPDATE;
Delete From MyTable Where MyColumn=MyValue;
COmmit;

is this true?..
correct me if iam wrong..

Thanks in advance.. :)