l_shipmode AIR FOB MAIL RAIL REG AIR SHIP TRUCK l_shipmode AIR FOB MAIL RAIL REG AIR SHIP TRUCK l_shipmode AIR FOB MAIL RAIL REG AIR SHIP TRUCK l_shipmode AIR FOB MAIL RAIL REG AIR SHIP TRUCK l_shipmode AIR FOB MAIL RAIL REG AIR SHIP TRUCK t1_a t1_b t2_b 1 2 3 2 4 5 t1_a t1_b t2_b 1 2 3 2 4 5 t1_a t1_b t2_b 1 2 3 2 4 5 t1_a t1_b t2_b 1 2 3 2 4 5 t1_a t1_b t2_b 1 2 3 2 4 5 t1_a t1_b t2_b 2 4 5 t1_a t1_b t2_b 2 4 5 t1_a t1_b t2_b 1 2 3 2 4 5 3 6 NULL t1_a t1_b t2_b 1 2 3 2 4 5 3 6 NULL t1_a t1_b t2_b 1 2 3 2 4 5 3 6 NULL t1_a t1_b t2_b 1 2 3 2 4 5 3 6 NULL t1_a t1_b t2_b 1 2 3 2 4 5 3 6 NULL t1_a t1_b t2_b 2 4 5 3 6 NULL t1_a t1_b t2_b 2 4 5 3 6 NULL a b 2 4 3 6 a b 1 2 2 4 a b 2 4 3 6 a b 1 2 a b 3 6 a b 2 4 3 6 a b 2 4 3 6 a b 3 6 a SUM(b) 1 12 2 4 3 6 a SUM(b) 1 12 a SUM(b) 1 12 2 4 3 6 a SUM(b) 1 12 a SUM(b) 1 12 2 4 3 6 a SUM(b) 1 12 2 4 3 6 a SUM(b) 1 12 a SUM(b) 1 12 2 4 3 6 a SUM(b) 1 12 i 45 -45 10 i 46 -46 10 i 46 460 10 i 46 10 i 10