SELECT entropy(SearchEngineID) FROM hits_100m_single settings max_threads = 1 SELECT entropy(SearchPhrase) FROM hits_10m_single SELECT entropy(MobilePhoneModel) FROM hits_100m_single SELECT entropy(URL) FROM hits_10m_single SELECT entropy(URLHash) FROM hits_10m_single SELECT entropy(URL, URLHash) FROM hits_10m_single SELECT entropy(ClientIP) FROM hits_10m_single SELECT entropy(RegionID) FROM hits_100m_single settings max_threads = 1 SELECT entropy(ClientIP, RegionID) FROM hits_10m_single