Using DISTINCT and COUNT together in a MySQL Query

Question

Is something like this possible:

SELECT DISTINCT COUNT(productId) WHERE keyword=\'$keyword\'

What I want is to get the number of unique pro

Answer 1

FYI, this is probably faster,

SELECT count(1) FROM (SELECT distinct productId WHERE keyword = '$keyword') temp

than this,

SELECT COUNT(DISTINCT productId) WHERE keyword='$keyword'