count multiple distinct columns

I want to build query to return how many rows are in this query:
select distinct c1, c2 from t1

But SQL won't accept this syntax:
select count (distinct c1, c2) from t1

Does someone know how to count multiple distinct columns? Thanks.

--
Disclaimer: This post is solely an individual opinion and does not speak on
behalf of any organization.One method is to use a derived table:

SELECT COUNT(*)
FROM (
SELECT DISTINCT c1, c2
FROM t1) AS t1

--
Hope this helps.

Dan Guzman
SQL Server MVP

"Dean" <noreply@.fakeaddress.com> wrote in message
news:cd1o36$aho$1@.news01.intel.com...
> I want to build query to return how many rows are in this query:
> select distinct c1, c2 from t1
> But SQL won't accept this syntax:
> select count (distinct c1, c2) from t1
> Does someone know how to count multiple distinct columns? Thanks.
>
> --
> Disclaimer: This post is solely an individual opinion and does not speak
on
> behalf of any organization.|||"Dan Guzman" <danguzman@.nospam-earthlink.net> wrote in message
news:8D_Ic.1568
> One method is to use a derived table:
> SELECT COUNT(*)
> FROM (
> SELECT DISTINCT c1, c2
> FROM t1) AS t1

Thanks! I was trying
SELECT COUNT(*) FROM (SELECT DISTINCT c1, c2 FROM t1)
but it wouldn't work without the "AS t1" at the end.

--
Disclaimer: This post is solely an individual opinion and does not speak on
behalf of any organization.|||Try this out..

SELECT COUNT(*) FROM (select distinct c1, c2 from t1)T