<i>Time complexity O(N) with N being the total number of elements of all the sets</i><blockquote>Return the members of a set resulting from the difference between the firstset provided and all the successive sets. Example:</blockquote>
key1 = x,a,b,c
key2 = c
key3 = a,d
SDIFF key1,key2,key3 => x,b
</pre><blockquote>Non existing keys are considered like empty sets.</blockquote>
<h2><aname="Return value">Return value</a></h2><ahref="ReplyTypes.html">Multi bulk reply</a>, specifically the list of common elements.