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teleview=# \d dim_time;
                               Table "public.dim_time"
   Column    |   Type   |                         Modifiers                          
-------------+----------+------------------------------------------------------------
 time_id     | integer  | not null default nextval('dim_time_time_id_seq'::regclass)
 bus_date    | date     | not null
 bus_day     | smallint | not null
 bus_month   | smallint | not null
 bus_quarter | smallint | not null
 bus_semi    | smallint | not null
 bus_year    | integer  | not null
Indexes:
    "dim_time_pkey" PRIMARY KEY, btree (time_id)
 
teleview=# \d dim_time2;
                               Table "public.dim_time2"
   Column    |   Type   |                          Modifiers                           
-------------+----------+--------------------------------------------------------------
 time2_id    | integer  | not null default nextval('dim_time2_time2_id_seq'::regclass)
 bus_month   | smallint | not null
 bus_quarter | smallint | not null
 bus_semi    | smallint | not null
 bus_year    | integer  | not null
Indexes:
    "dim_time2_pkey" PRIMARY KEY, btree (time2_id)
 
teleview=# \d fact_sales;
                                  Table "public.fact_sales"
    Column     |  Type   |                             Modifiers                              
---------------+---------+--------------------------------------------------------------------
 fact_sales_id | integer | not null default nextval('fact_sales_fact_sales_id_seq'::regclass)
 time_id       | integer | not null
 region_id     | integer | not null
 dealer_id     | integer | not null
 product_id    | integer | not null
 contract_id   | integer | not null
 promotion_id  | integer | not null
 sales         | real    | not null
Indexes:
    "fact_sales_pkey" PRIMARY KEY, btree (fact_sales_id)
    "ix_fact_sales_fact_sales_id" btree (fact_sales_id)
Foreign-key constraints:
    "fact_sales_contract_id_fkey" FOREIGN KEY (contract_id) REFERENCES dim_contract(contract_id)
    "fact_sales_dealer_id_fkey" FOREIGN KEY (dealer_id) REFERENCES dim_dealer(dealer_id)
    "fact_sales_product_id_fkey" FOREIGN KEY (product_id) REFERENCES dim_product(product_id)
    "fact_sales_promotion_id_fkey" FOREIGN KEY (promotion_id) REFERENCES dim_promotion(promotion_id)
    "fact_sales_region_id_fkey" FOREIGN KEY (region_id) REFERENCES dim_region(region_id)
    "fact_sales_time_id_fkey" FOREIGN KEY (time_id) REFERENCES dim_time(time_id)
 
teleview=# \d fact_sales_month_agg;
                                            Table "public.fact_sales_month_agg"
         Column          |  Type   |                                       Modifiers                                        
-------------------------+---------+----------------------------------------------------------------------------------------
 fact_sales_month_agg_id | integer | not null default nextval('fact_sales_month_agg_fact_sales_month_agg_id_seq'::regclass)
 time2_id                | integer | not null
 region_id               | integer | not null
 dealer_id               | integer | not null
 product_id              | integer | not null
 contract_id             | integer | not null
 promotion_id            | integer | not null
 sales                   | real    | not null
 prediction              | real    | not null
 trend                   | real    | not null
 avcpv                   | real    | not null
 nonusage                | real    | not null
 qosales                 | real    | not null
 rank                    | real    | not null
Indexes:
    "fact_sales_month_agg_pkey" PRIMARY KEY, btree (fact_sales_month_agg_id)
Foreign-key constraints:
    "fact_sales_month_agg_contract_id_fkey" FOREIGN KEY (contract_id) REFERENCES dim_contract(contract_id)
    "fact_sales_month_agg_dealer_id_fkey" FOREIGN KEY (dealer_id) REFERENCES dim_dealer(dealer_id)
    "fact_sales_month_agg_product_id_fkey" FOREIGN KEY (product_id) REFERENCES dim_product(product_id)
    "fact_sales_month_agg_promotion_id_fkey" FOREIGN KEY (promotion_id) REFERENCES dim_promotion(promotion_id)
    "fact_sales_month_agg_region_id_fkey" FOREIGN KEY (region_id) REFERENCES dim_region(region_id)
    "fact_sales_month_agg_time2_id_fkey" FOREIGN KEY (time2_id) REFERENCES dim_time2(time2_id) 


now i want to load all the data from the fact_sales in month wise aggreated form of sales