create external table store_sales
(
    ss_sold_date_sk           int,
    ss_sold_time_sk           int,
    ss_item_sk                int,
    ss_customer_sk            int,
    ss_cdemo_sk               int,
    ss_hdemo_sk               int,
    ss_addr_sk                int,
    ss_store_sk               int,
    ss_promo_sk               int,
    ss_ticket_number          int,
    ss_quantity               int,
    ss_wholesale_cost         float,
    ss_list_price             float,
    ss_sales_price            float,
    ss_ext_discount_amt       float,
    ss_ext_sales_price        float,
    ss_ext_wholesale_cost     float,
    ss_ext_list_price         float,
    ss_ext_tax                float,
    ss_coupon_amt             float,
    ss_net_paid               float,
    ss_net_paid_inc_tax       float,
    ss_net_profit             float                  
)
stored as orc ....