Postgrex v0.13.0 Postgrex.Result
Result struct returned from any successful query. Its fields are:
command- An atom of the query command, for example::selector`:insert`;columns- The column names;rows- The result set. A list of tuples, each tuple corresponding to arow, each element in the tuple corresponds to a column;num_rows- The number of fetched or affected rows;connection_id- The OS pid of the Postgres backend that executed the query;