Join question

Hi All, 

I have two tables that i would like to join A and B. 

I would like All from table B and left join table A (meaning those from A that are not present in B) 

I now do it in two steps: 

1. Left join table A 

2. Append table B with A to get final result

Maybe a stupid question but is there a Join that combines step 1 and 2?

I am asking this as i also have many other tables to join and when wondering if the steps could be compressed.