T-SQL - How to write a conditional join

Question

I have a stored procedure with a number of parameters. I would like to write my query so that it joins with certain tables but only if a particular parameter has a value. Take

Answer 1

What Quntin posted is nice however there are some performance issues with it. Believe it or not what is faster is to check each parameter and write the SQL Join based on the case

In addition:

IF @AddressParameter IS NOT NULL
BEGIN
SELECT blah1, blah2 FROM OneTable INNER JOIN AddressTable WHERE ....
-more code
END
ELSE...
BEGIN
END
...

Another thing you can do is perform the joins and in the query filter (the where clause) you can do:

WHERE
(Address = @Address OR @Address IS NULL)

Performance here is shady as well.