Hi thanks alot for solution.But this script is not considering all the records.
My input file having million records.
30/03/2009,17981-G,MIDAS,,FX Euro Option,,MELLON ADM,MELLON ADM,DBSA,DBSA,26/03/2009,84450.7476,30/03/2009,,4200000,BRL,,,USD,C,B,26/05/2009,139,USD,199061.35,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17980-G,MIDAS,,FX Euro Option,,MELLON ADM,MELLON ADM,DBSA,DBSA,26/03/2009,183108.5122,30/03/2009,,6600000,BRL,,,USD,C,B,26/05/2009,137,USD,374182.77,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17978-G,MIDAS,,FX Euro Option,,QUEST MACRO 30,QUEST MACRO 30,DBSA,DBSA,24/03/2009,-7841.8551,30/03/2009,,-390000,BRL,,,USD,C,S,26/05/2009,139,USD,-20803.77,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17977-G,MIDAS,,FX Euro Option,,ADVANTAGE QUEST,ADVANTAGE QUEST,DBSA,DBSA,24/03/2009,-1709.1223,30/03/2009,,-85000,BRL,,,USD,C,S,26/05/2009,139,USD,-4534.15,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17976-G,MIDAS,,FX Euro Option,,QUEST90 FIM,QUEST90 FIM,DBSA,DBSA,24/03/2009,-9651.514,30/03/2009,,-480000,BRL,,,USD,C,S,26/05/2009,139,USD,-25604.64,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17975-G,MIDAS,,FX Euro Option,,QUESTX FIM,QUESTX FIM,DBSA,DBSA,24/03/2009,-8042.9283,30/03/2009,,-400000,BRL,,,USD,C,S,26/05/2009,139,USD,-21337.2,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17974-G,MIDAS,,FX Euro Option,,MELLONQUEST30,MELLONQUEST30,DBSA,DBSA,24/03/2009,-51173.1316,30/03/2009,,-2545000,BRL,,,USD,C,S,26/05/2009,139,USD,-135757.93,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17973-G,MIDAS,,FX Euro Option,,MELLONQUEST I,MELLONQUEST I,DBSA,DBSA,24/03/2009,-6032.1963,30/03/2009,,-300000,BRL,,,USD,C,S,26/05/2009,139,USD,-16002.9,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17972-G,MIDAS,,FX Euro Option,,QUEST MACRO 30,QUEST MACRO 30,DBSA,DBSA,24/03/2009,-16923.6655,30/03/2009,,-610000,BRL,,,USD,C,S,26/05/2009,137,USD,-34583.55,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17971-G,MIDAS,,FX Euro Option,,QUEST90 FIM,QUEST90 FIM,DBSA,DBSA,24/03/2009,-21085.2226,30/03/2009,,-760000,BRL,,,USD,C,S,26/05/2009,137,USD,-43087.7,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17970-G,MIDAS,,FX Euro Option,,QUESTX FIM,QUESTX FIM,DBSA,DBSA,24/03/2009,-17201.1027,30/03/2009,,-620000,BRL,,,USD,C,S,26/05/2009,137,USD,-35150.49,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17969-G,MIDAS,,FX Euro Option,,MELLONQUEST30,MELLONQUEST30,DBSA,DBSA,24/03/2009,-110974.8559,30/03/2009,,-4000000,BRL,,,USD,C,S,26/05/2009,137,USD,-226777.44,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17968-G,MIDAS,,FX Euro Option,,MELLONQUEST I,MELLONQUEST I,DBSA,DBSA,24/03/2009,-13316.9827,30/03/2009,,-480000,BRL,,,USD,C,S,26/05/2009,137,USD,-27213.28,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17962-G,MIDAS,,FX Euro Option,,ADVANTAGE QUEST,ADVANTAGE QUEST,DBSA,DBSA,23/03/2009,-3606.6828,30/03/2009,,-130000,BRL,,,USD,C,S,26/05/2009,137,USD,-7370.26,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17960-G,MIDAS,,FX Euro Option,,MELGLOMKTFICFIM,MELGLOMKTFICFIM,DBSA,DBSA,18/03/2009,-149704.8449,30/03/2009,,-15000000,BRL,,,USD,C,S,01/04/2011,2.3,USD,-6880999.5,BRL,BRL,BRZ,,,,01/04/2011,,
30/03/2009,17959-G,MIDAS,,FX Euro Option,,MELGLOMKTFICFIM,MELGLOMKTFICFIM,DBSA,DBSA,18/03/2009,-435720.3749,30/03/2009,,-20000000,BRL,,,USD,C,S,03/01/2011,2,USD,-12858000,BRL,BRL,BRZ,,,,03/01/2011,,
30/03/2009,17958-G,MIDAS,,FX Euro Option,,MELGLOMKTFICFIM,MELGLOMKTFICFIM,DBSA,DBSA,18/03/2009,-256346.867,30/03/2009,,-15000000,BRL,,,USD,C,S,03/01/2011,2.2,USD,-7200000,BRL,BRL,BRZ,,,,03/01/2011,,
30/03/2009,17957-G,MIDAS,,FX Euro Option,,MELGLOMKTFICFIM,MELGLOMKTFICFIM,DBSA,DBSA,18/03/2009,-762701.3198,30/03/2009,,-30000000,BRL,,,USD,C,S,01/07/2010,2,USD,-16455000,BRL,BRL,BRZ,,,,01/07/2010,,
30/03/2009,17956-G,MIDAS,,FX Euro Option,,MELGLOMKTFICFIM,MELGLOMKTFICFIM,DBSA,DBSA,18/03/2009,-269765.1783,30/03/2009,,-15000000,BRL,,,USD,C,S,01/07/2010,2.2,USD,-5856999,BRL,BRL,BRZ,,,,01/07/2010,,
@
when I ran ur script I got following results.
30/03/2009,17981-G,MIDAS,,FX Euro Option,,MELLON ADM,MELLON ADM,DBSA,DBSA,26/03/2009,84450.7476,30/03/2009,,4200000,BRL,,,USD,C,B,26/05/2009,139,USD,199061.35,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17980-G,MIDAS,,FX Euro Option,,MELLON ADM,MELLON ADM,DBSA,DBSA,26/03/2009,183108.5122,30/03/2009,,6600000,BRL,,,USD,C,B,26/05/2009,137,USD,374182.77,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17978-G,MIDAS,,FX Euro Option,,QUEST MACRO 30,QUEST MACRO 30,DBSA,DBSA,24/03/2009,-7841.8551,30/03/2009,,-390000,BRL,,,USD,C,S,26/05/2009,139,USD,-20803.77,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17977-G,MIDAS,,FX Euro Option,,ADVANTAGE QUEST,ADVANTAGE QUEST,DBSA,DBSA,24/03/2009,-1709.1223,30/03/2009,,-85000,BRL,,,USD,C,S,26/05/2009,139,USD,-4534.15,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17976-G,MIDAS,,FX Euro Option,,QUEST90 FIM,QUEST90 FIM,DBSA,DBSA,24/03/2009,-9651.514,30/03/2009,,-480000,BRL,,,USD,C,S,26/05/2009,139,USD,-25604.64,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17975-G,MIDAS,,FX Euro Option,,QUESTX FIM,QUESTX FIM,DBSA,DBSA,24/03/2009,-8042.9283,30/03/2009,,-400000,BRL,,,USD,C,S,26/05/2009,139,USD,-21337.2,BRL,BRL,BRZ,,,,26/05/2009,,
30/03/2009,17974-G,MIDAS,,FX Euro Option,,MELLONQUEST30,MELLONQUEST30,DBSA,DBSA,24/03/2009,-51173.1316,30/03/2009,,-2545000,BRL,,,USD,C,S,26/05/2009,139,USD,-135757.93,BRL,BRL,BRZ,,,,26/05/2009,,
27/03/2009,17927-G,MIDAS,,FX American Option,,VENTURA HEDGE,VENTURA HEDGE,DBSA,DBSA,09/03/2009,,27/03/2009,,4100000,BRL,,,USD,C,B,10/09/2009,.000001,USD,784248,BRL,BRL,BRZ,,,,10/09/2009,,
27/03/2009,16058-G,MIDAS,,FX Euro Option,,BES,BES,DBSA,DBSA,29/09/2006,,27/03/2009,,62900000,BRL,,,USD,C,B,05/10/2009,2.95,USD,8900350,BRL,BRL,BRZ,,,,05/10/2009,,
So if you see output file it didn't fetch recods from 17973 and so on.........
Also nawk command is not working on my bash shell.so ran this command by creating awk file(sample.awk) with "FNR <=8 {print; next} {a[$2]=$0} END {for (i in a) print a[i]}" and then ran it as awk -f sample.awk trade.txt