Get count of distinct values in SQL

I have a table with 23 total rows. One of the columns is called thing. There are only 11 distinct things out of the 23 total rows.

When I run:

SELECT DISTINCT thing FROM tablename WHERE condition

I correctly get 11 rows.

However, when I run:

SELECT DISTINCT COUNT(thing) FROM tablename WHERE condition

I get 23 for the total count. However, I want to get 11, which is the count of the distinct things. How can I rewrite my query so that it gives me a total count of 11?

>Solution :

SELECT COUNT(DISTINCT thing) FROM tablename WHERE condition