Home/ Questions/Q 6565091
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-25T14:02:59+00:00

I work on unix server. I have many csv files containing, among other info,

  • 0

I work on unix server.
I have many csv files containing, among other info, date fields.

I have to replace some of this date fields with another value, for example 20110915 to 20110815. Their position is variable from a file to another.

The problem is that the substitution is position field specific. For example, if my file has row like this:

blablabla;12;0.2121;20110915;20110915;19951231;popopo;other text;321;20101010

I have to replace only first date fields and not other, transforming row in:

blablabla;12;0.2121;20110815;20110915;19951231;popopo;other text;321;20101010

Is there a way to restrict the replace in file, using some constraints?

Thanks

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    You can try awk:

    awk  'BEGIN {FS=";";OFS=";"} {if($4=="20110915")$4="20110815"; print}' input.csv

    How it works:

    FS and OFS define the input and output field separators. It compares the fourth field ($4) against 20110915. If it matches, it is changed to 20110815. The line is then printed.

    • 0