This SELECT statement uses READ_NOS to query a file in Google Cloud Storage. Instead of using an authorization object, the authorization credentials are including in the AUTHORIZATION keyword.
SELECT payload FROM (
LOCATION='/gs/storage.googleapis.com/td-usgs/JSONDATA/'
AUTHORIZATION='{"ACCESS_ID":"","ACCESS_KEY":""}'
) AS dt;
Depending on the user credentials, Analytics Database uses either the S3-compatible connector or the native Google connector.
Your result is similar to the following:
{ "site_no":"09380000", "datetime":"2018-06-27 00:00", "Flow":"16200", "GageHeight":"9.97", "Temp":"11.0", "Conductance":"669", "Precipitation":"0.00"}
{ "site_no":"09380000", "datetime":"2018-06-28 00:00", "Flow":"15900", "GageHeight":"9.91", "Temp":"11.0", "Conductance":"671", "Precipitation":"0.00"}
[...]