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08-04-2008
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comparison of 2 files
Kindly help on follows.
I have 2 files. One file contains only one column of mobile numbers. And total records in a file 12 million. Second file contains 2 columns mobile numbers and balance. and total records 30 million. I want to find out balance of each data in file 1 corresponding to file 2. I tried egrep -f but it will take very long time. And also use awk '{OFS="|"}NR<=FNR{a[$1]=$1}NR>FNR{print $1,$2,a[$1]}' a b but its given error after 7 million says long data. Can you provide me other commands. please Thanks in advance.. Last edited by kamal_418; 08-04-2008 at 05:20 AM.. |
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08-04-2008
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For that amount of data, maybe it would make sense to import the information into a database.
Search this site for NR=FNR for a number of awk solutions to similar problems. |
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08-04-2008
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You can use the join command (input files must be sorted on the first column) :
Code:
join kamal1.dat kamal2.dat Code:
111 222 333 888 Code:
000 1000 111 1111 222 1222 444 1444 777 1777 888 1888 999 1999 Code:
111 1111 222 1222 888 1888 |
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