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Full Discussion: Merge two csv files using column name
Top Forums UNIX for Dummies Questions & Answers Merge two csv files using column name Post 302950476 by Don Cragun on Saturday 25th of July 2015 02:28:33 AM
Old 07-25-2015
What have you tried?

What operating system and shell are you using?

What tools do you want to use?

If File 1 contained the additional line:
Code:
MKIOU8712T,Swathi,80000

how would that be combined with the line:
Code:
MKIOU8712T,Swathi,TRY,87900

from File 2?

Is there some field that will always be present in every input file?

Is there some field or combination of fields that is to be used a way to match lines from two files? Or, all all lines from all input files to be considered independent from all other input files and the only change in the output from the input lines is to add empty fields to lines from input files that don't have one or more of the headings from the combined list of input files?

Are you always processing two input files to produce one output file, or can there be more than two input files?

What determines the order of the fields in the output file? If you're processing File 1 and File 2 in that order, why couldn't the output field order be:
Code:
PAN,NAME,Salary,Dept

instead of:
Code:
PAN,NAME,DEPT,Salary

and why did the heading you showed in File 3 change Dept (from File 2) to DEPT?

If one input file has the heading line: a,b,c,d and another input file has the heading line: D,C,A,B, are there supposed to be four fields in the output file or eight? (I.e., are heading labels case sensitive?)
 

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LEARN ABOUT DEBIAN

bb-csvinfo.cgi

BB-CSVINFO.CGI(1)					      General Commands Manual						 BB-CSVINFO.CGI(1)

NAME

       bb-csvinfo.cgi - CGI program to show host information from a CSV file

SYNOPSIS

       bb-csvinfo.cgi

DESCRIPTION

       bb-csvinfo.cgi  is  invoked  as	a CGI script via the bb-csvinfo.sh CGI wrapper.  Based on the parameters it receives, it searches a comma-
       separated file for the matching host, and presents the information found as a table.

       bb-csvinfo.cgi is passed a QUERY_STRING environment variable with the following parameters:

	  key (string to search for, typically hostname)
	  column (columnnumber to search - default 0)
	  db  (name of the CSV database file in $BBHOME/etc/, default hostinfo.csv)
	  delimiter (delimiter character for columns, default semi-colon)

       CSV files are easily created from e.g. spreadsheets, by exporting them in CSV format. You should have one host per  line,  with	the  first
       line  containing  the  column headings. Despite their name, the default delimiter for CSV files is the semi-colon - if you need a different
       delimiter, invoke bb-csvinfo.cgi with the "delimiter=<character>" in the query string.

Example usage
       This example shows how you can use the bb-csvinfo CGI. It assumes you have a CSV-formatted file with information about the hosts stored	as
       $BBHOME/etc/hostinfo.csv, and the hostname is in the first column of the file.

       Use with the bbgen --docurl
	      The  --docurl  option to bbgen(1) sets up all of the hostnames on your Xymon webpages to act as links to a CGI script. To invoke the
	      bb-csvinfo CGI script, run bbgen with the option

		 --docurl=/cgi-bin/bb-csvinfo.sh?db=hostinfo.csv&key=%s

SEE ALSO

       bb-hosts(5), hobbitserver.cfg(5), bbgen(1)

Xymon							    Version 4.2.3:  4 Feb 2009						 BB-CSVINFO.CGI(1)
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