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Top Forums Shell Programming and Scripting Match columns from two csv files and update field in one of the csv file Post 302926669 by djoseph on Wednesday 26th of November 2014 12:42:54 AM
Old 11-26-2014
Match columns from two csv files and update field in one of the csv file

Hi,

I have a file of csv data, which looks like this:

Code:
file1:
1AA,LGV_PONCEY_LES_ATHEE,1,\N,1,00020460E1,0,\N,\N,\N,\N,2,00.22335321,0.00466628
2BB,LES_POUGES_ASF,\N,200,200,00006298G1,0,\N,\N,\N,\N,1,00.30887539,0.00050312
201,LES_POUGES_ASF,\N,201,201,00006298G1,0,\N,\N,\N,\N,1,00.30887539,0.00050312


The second file has unique rows and fields(particularly field 2):

Code:
file2:
000116T3,1AA
000117T3,888
000118T3,201
000122T3,2BB


What I am trying to achieve is :-
Code:
if (12th field value in file1='1')
	then 
		if  ( match the 1st field value of the first file with 2nd field value of the 2nd file)
			then replace 6th field value of file1 with 1st field value of the matching row of the 2nd file 
		 else
			do nothing
	else do nothing


Code:
Sample required output:
1AA,LGV_PONCEY_LES_ATHEE,1,\N,1,00020460E1,0,\N,\N,\N,\N,2,00.22335321,0.00466628
2BB,LES_POUGES_ASF,\N,200,200,000122T3,0,\N,\N,\N,\N,1,00.30887539,0.00050312
202,LES_POUGES_ASF,\N,201,201,00006298G1,0,\N,\N,\N,\N,1,00.30887539,0.00050312


Does anyone know of any solution?

I tried to modify a solution which I found in a similar thread named "Matching and Merging csv data fields based on a common field" but in vain Smilie

Thanks in advance
Moderator's Comments:
Mod Comment Please use CODE tags (not ICODE tags) for multi-line input, output, and code samples.

Last edited by Don Cragun; 11-26-2014 at 01:58 AM.. Reason: Change ICODE tags to CODE tags for multi-line data.
 

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