Many Fields Update From A Group By Clause

Hi All,

In Oracle, I can easily make this query :

UPDATE t1 SET (f1,f2)=(SELECT AVG(f3),SUM(f4)
FROM t2
WHERE t2.f5=t1.f6)
WHERE f5='Something'

I cannot seem to be able to do the same thing with MS-SQL. There are
only 2 ways I've figured out, and I fear performance cost in both cases,
which are these :
1)
UPDATE t1 SET f1=(SELECT AVG(f3)
FROM t2
WHERE t2.f5=t1.f6)
WHERE f5='Something'

and then the same statement but with f2, and

2)
UPDATE t1 SET f1=(SELECT AVG(f3)
FROM t2
WHERE t2.f5=t1.f6),
f2=(SELECT SUM(f4)
FROM t2
WHERE t2.f5=t1.f6)
WHERE f5='Something'

Is there a way with MS-SQL to do the Oracle equivalent in this case ?

Thanks,

Michel