shell out for nested aggregates[0]. one 'sql querry' to run a batch shell containing all multiple aggregate levels in a file, import back in to return table ref

shell out for nested aggregates[0]. one 'sql querry' to run a batch shell containing all multiple aggregate levels in a file, import back in to return table reference. [0] : https://medium.com/r3d-buck3t/command-execution-with-postgresql-copy-command-a79aef9c2767 https://medium.com/r3d-buck3t/command-execution-with-postgre...