market freq_block round_num bid_amt bidder_num date time net_bid_amt sort_col_1 sort_col_2 ME22 B 24 88002 1234 4/23/97 15:00:49 88002 4 2 RE08 D 24 42008 1216 4/23/97 15:03:20 27305 13 16 RE09 D 24 4608 1216 4/23/97 15:03:20 2995 13 18