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Comparing files

 
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# 8  
Old 11-14-2008
Use nawk.
Code:
awk '  FILENAME=="file2" {arr[$0]++}
         FILENAME=="file1" {
           if( $0 in arr) 
               {continue} else  {print $0}        
         }'  file2  file1 > file3

# 9  
Old 11-14-2008
Yet another one:
Code:
nawk 'NR==FNR{_[$0];next}!($0 in _)' file2 file1

# 10  
Old 11-14-2008
Workaround
I'm already use this script:

Code:
for i in `cat file1`
do
 grep $i file2|| echo "$i" >> file3
done

but my file1 and and file2 are soo big, like 200.000 rows, it is taking toom uch time (arround 6 howrs) and the file3 have already 40.000 rows, the total must be around 70.000.

Any better option?
# 11  
Old 11-14-2008
Yes,
read the two posts above ...
# 12  
Old 11-14-2008
MySQL
Quote:
Originally Posted by radoulov
Yes,
read the two posts above ...

Thanx radoulov, your code works:

Code:
nawk 'NR==FNR{_[$0];next}!($0 in _)' file1 file2 > file3

Thanx again. Smilie
# 13  
Old 11-15-2008
try comm command if available in HP-UX
try the command

comm -23 file1 file2

you can reverse file1 and file 2 also....

i got it working on my hpux system
# 14  
Old 11-17-2008
If the files are sorted, then join command can help

refer man pages for join...

join -v1 file1 file2 should work
 
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