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Merging two files by matching patial field

Comment:

Hi All, I have two files. cat numbers.csv 9999500123,A,B,CFGGH 01199234984,S,D,CFGde 0023445875554,sddf,fhh,wwr cat prefix.csv 9999,jpr,3.12,60 01199234,dlr,3.23,60 00234458,uee.5,40 002344,upp,8,90 I want output as 9999,jpr,3.12,60,9999500123,A,B,CFGGH 01199234,dlr,3.23,60,01199234984,S,D,CFGde 00234458,uee.5,40,0023445875554,sddf,fhh,wwr Pls help in unix shell script like awk. The numbers.csv is very big file.

Reply:

Solution deleted. Misread the problem.

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