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 2 8900000 0253 4/1/97 10:04:39 8900000 10235000 1 1 1 N002 2 9342788 0250 4/1/97 10:02:48 9342788 10744000 1 1 2