market freq_block round_num bid_amt bidder_num date time net_bid_amt sort_col_1 sort_col_2 E036 A 234 232000 3060 12/8/97 14:00:26 232000 1 106 E079 A 234 317000 3011 12/8/97 14:00:10 317000 1 235 E079 A 234 317000 3060 12/8/97 14:08:58 317000 1 235