COPY INTO <..> FROM @%<table_name> #using tbl stg
FROM @/<file_name> #user stg, single file
FROM @/. FILE_FORMAT = (..) #user stg, multiple files
#Using named internal stage, when you'll load the data from the named internal stage into the table using the COPY command. You do not provide a file format in the COPY command if the named internal stage already has an associated file format.