market freq_block bid_round bid_amt bidder_num date time net_bid_amt min_accept num_of_bids sort_col_1 sort_col_2 N001 13 38023613 0252 4/1/97 14:47:06 38023613 43727000 1 1 1 N002 13 37700000 0253 4/1/97 14:45:51 37700000 43355000 2 1 2