file comparison

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# 1  
Question file comparison


I have 2 files to comapre ,in file a sible column it is numbers,in file b2 numbers and other values with coma separated.
i want compare numbers in file a with file b,and the out put put should be in C with numbers in both file a and b along with other columns of file b.

i used folowing scripts
for line in `cat gprs2.txt`
more gprs_calls2.txt |grep $line >> NEW2.txt

but it is not giving correct out put.and also this scrpits is not sppedy

plz help..
# 2  
start with something like this:
grep -f gprs2.txt  gprs_calls2.txt > NEW2.txt

I had trouble understanding what you need. This just prints what is in file gprs_calls2.txt. Not what is in both files
# 3  
The files are like this


12345 fsfsdf 76775
23456 ytyy 090890
66444 rytry 878878

The out put should be
12345 fsfsdf 76775
23456 ytyy 090890

The file1 contains arround 1 million lines file2 has 2.5 million lines

pls help..
# 4  
The standard solution will hold the entire file1 in memory:

awk>file3 'NR==FNR{_[$1];next}$1 in _' file1 file2

# 5  

I have Tried .could u plz help..
out 'NR==FNR{_[$1];next}$1 in _' gprs2.txt gprs_calls2.txt

scripts by rplacing the respective filenames ,the out put does not have any data
the actual file lokks like this
Source file

Dest file to be compared(Source file no should be compared with dest file,the out should be the no of desti ,which exists in source,along with othere columns of desti corresponds the number
# 6  
that's because the sample data you provided had a different format.

You may try this:

(use nawk or /usr/xpg4/bin/awk on Solaris)

awk>file3 'NR==FNR{_[$1];next}$1 in _' file1 FS=, file2

# 7  
The field separator is missing from radoulov's script.

awk -F, 'NR==FNR{_[$1];next}$1 in _' gprs2.txt gprs_calls2.txt

Your description of the output you require is not understandable to me. This will print the lines in gprs_calls2.txt whose first field matches a value in (the first field of) gprs2.txt.

Last edited by era; 10-09-2008 at 08:25 AM.. Reason: I mean the earlier version of radoulov's script -- we posted basically at the same time
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