| checkHttpStatus | private function for check the http status |
| dataJson2df | private function to convert the returned jason data to a dataframe |
| genDfwds | private function for constructing the query parameter for dfwds |
| milSec | private function for sec |
| statscnDbs | the available dbs |
| statscnQueryData | query data in the statscn db |
| statscnQueryLastN | fetch the lastN data |
| statscnQueryZb | the data categories |
| statscnRegions | the regions in db |
| statscnRowNamePrefix | statscnRowNamePrefix |