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Top Forums Shell Programming and Scripting comparing two files using awk. Post 302096969 by jerome Sukumar on Tuesday 21st of November 2006 12:34:41 AM
Old 11-21-2006
comparing two files using awk.

Hi All,

a new bie to awk,

How to compare substring of col1,file 1 with
col2file2 and get file1contents+col3file2 as output.

file1
-----
kumarfghh,23,12000,5000
rajakumar,24,14000,2500
rajeshchauhan,25,16000,2600
manoj,26,17000,2300

file 2
--------
123,kumar,US,
123,sukumar,UK
123,raj,Germany
40,rajesh,Australia
40,jerome,swiss
40,rakesh,india

output
-----------------------
kumarfghh,23,12000,5000,kumar,US
rajakumar,24,14000,2500,raj,Germany
rajeshchauhan,25,16000,2600,rajesh,Australia
manoj,26,17000,2300,,

Note:so if nothing matched i should get a default value as null.

Please help me,as i have been trying very hard to acheive
 

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DIFF(1) 						      General Commands Manual							   DIFF(1)

NAME
diff - print differences between two files SYNOPSIS
diff [-c | -e | -C n] [-br]file1 file2 OPTIONS
-C n Produce output that contains n lines of context -b Ignore white space when comparing -c Produce output that contains three lines of context -e Produce an ed-script to convert file1 into file2 -r Apply diff recursively to files and directories of EXAMPLES
diff file1 file2 # Print differences between 2 files diff -C 0 file1 file2 # Same as above diff -C 3 file1 file2 # Output three lines of context with every diff -c file1 file2 # Same diff /etc /dev # Compares recursively the directories /etc and /dev diff passwd /etc # Compares ./passwd to /etc/passwd DESCRIPTION
the same name, when file1 and file2 are both directories" difference encountered" Diff compares two files and generates a list of lines telling how the two files differ. Lines may not be longer than 128 characters. If the two arguments on the command line are both directories, diff recursively steps through all subdirectories comparing files of the same name. If a file name is found only in one directory, a diagnostic message is written to stdout. A file that is of either block special, character special or FIFO special type, cannot be compared to any other file. On the other hand, if there is one directory and one file given on the command line, diff tries to compare the file with the same name as file in the directory directory. SEE ALSO
cdiff(1), cmp(1), comm(1), patch(1). DIFF(1)
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