Remove row of first duplicated column 1 from csv

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I need some help removing first repeated line (for field 1) from a csv file.



I have a large csv file with a structure similar to this:



334050049049426,2018-11-06T20:21:56.591Z,xxx,gdl-qns28-1540279057144
334050049049426,2018-11-06T21:32:47.431Z,xxx,gdl-qns19-1540278993723
334090015032064,2018-11-06T22:22:31.247Z,xxx,gdl-qns15-1540279009813
334090015032064,2018-11-07T01:44:11.442Z,xxx,gdl-qns25-1540279437614
334090015032064,2018-11-07T03:57:18.911Z,xxx,gdl-qns28-1540279710160
334050069888299,2018-11-07T03:32:12.899Z,xxx,gdl-qns29-1540279367769
334050069888299,2018-11-07T03:58:15.475Z,xxx,mgc-qns20-1540281468455


I need to be able to remove the first line found of duplicated values from the first column so for example line # 1,3 and 6 needs to be remove.



any help is greatly appreciated.






shell-script shell







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  • Better use a tool designed to process csv, not the shell directly.
    – Isaac
    2 mins ago














up vote
0
down vote

favorite












I need some help removing first repeated line (for field 1) from a csv file.



I have a large csv file with a structure similar to this:



334050049049426,2018-11-06T20:21:56.591Z,xxx,gdl-qns28-1540279057144
334050049049426,2018-11-06T21:32:47.431Z,xxx,gdl-qns19-1540278993723
334090015032064,2018-11-06T22:22:31.247Z,xxx,gdl-qns15-1540279009813
334090015032064,2018-11-07T01:44:11.442Z,xxx,gdl-qns25-1540279437614
334090015032064,2018-11-07T03:57:18.911Z,xxx,gdl-qns28-1540279710160
334050069888299,2018-11-07T03:32:12.899Z,xxx,gdl-qns29-1540279367769
334050069888299,2018-11-07T03:58:15.475Z,xxx,mgc-qns20-1540281468455


I need to be able to remove the first line found of duplicated values from the first column so for example line # 1,3 and 6 needs to be remove.



any help is greatly appreciated.






shell-script shell







share|improve this question









New contributor




Ian is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.



















  • Better use a tool designed to process csv, not the shell directly.
    – Isaac
    2 mins ago












up vote
0
down vote

favorite









up vote
0
down vote

favorite











I need some help removing first repeated line (for field 1) from a csv file.



I have a large csv file with a structure similar to this:



334050049049426,2018-11-06T20:21:56.591Z,xxx,gdl-qns28-1540279057144
334050049049426,2018-11-06T21:32:47.431Z,xxx,gdl-qns19-1540278993723
334090015032064,2018-11-06T22:22:31.247Z,xxx,gdl-qns15-1540279009813
334090015032064,2018-11-07T01:44:11.442Z,xxx,gdl-qns25-1540279437614
334090015032064,2018-11-07T03:57:18.911Z,xxx,gdl-qns28-1540279710160
334050069888299,2018-11-07T03:32:12.899Z,xxx,gdl-qns29-1540279367769
334050069888299,2018-11-07T03:58:15.475Z,xxx,mgc-qns20-1540281468455


I need to be able to remove the first line found of duplicated values from the first column so for example line # 1,3 and 6 needs to be remove.



any help is greatly appreciated.






shell-script shell







share|improve this question









New contributor




Ian is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











I need some help removing first repeated line (for field 1) from a csv file.



I have a large csv file with a structure similar to this:



334050049049426,2018-11-06T20:21:56.591Z,xxx,gdl-qns28-1540279057144
334050049049426,2018-11-06T21:32:47.431Z,xxx,gdl-qns19-1540278993723
334090015032064,2018-11-06T22:22:31.247Z,xxx,gdl-qns15-1540279009813
334090015032064,2018-11-07T01:44:11.442Z,xxx,gdl-qns25-1540279437614
334090015032064,2018-11-07T03:57:18.911Z,xxx,gdl-qns28-1540279710160
334050069888299,2018-11-07T03:32:12.899Z,xxx,gdl-qns29-1540279367769
334050069888299,2018-11-07T03:58:15.475Z,xxx,mgc-qns20-1540281468455


I need to be able to remove the first line found of duplicated values from the first column so for example line # 1,3 and 6 needs to be remove.



any help is greatly appreciated.






shell-script shell




shell-script shell






share|improve this question









New contributor




Ian is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question









New contributor




Ian is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









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edited 4 mins ago









Isaac

8,92211342




8,92211342






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asked 25 mins ago









Ian

1




1




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New contributor





Ian is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






Ian is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











  • Better use a tool designed to process csv, not the shell directly.
    – Isaac
    2 mins ago
















  • Better use a tool designed to process csv, not the shell directly.
    – Isaac
    2 mins ago















Better use a tool designed to process csv, not the shell directly.
– Isaac
2 mins ago




Better use a tool designed to process csv, not the shell directly.
– Isaac
2 mins ago










1 Answer
1






active

oldest

votes

















up vote
0
down vote













Try the below command,



awk -F',' '!seen[$1]++' file.csv





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  • This does the opposite of what was asked. That is: it will print the first line and remove all following repeats.
    – Isaac
    2 mins ago










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1 Answer
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active

oldest

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1 Answer
1






active

oldest

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active

oldest

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active

oldest

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up vote
0
down vote













Try the below command,



awk -F',' '!seen[$1]++' file.csv





share|improve this answer




















  • This does the opposite of what was asked. That is: it will print the first line and remove all following repeats.
    – Isaac
    2 mins ago














up vote
0
down vote













Try the below command,



awk -F',' '!seen[$1]++' file.csv





share|improve this answer




















  • This does the opposite of what was asked. That is: it will print the first line and remove all following repeats.
    – Isaac
    2 mins ago












up vote
0
down vote










up vote
0
down vote









Try the below command,



awk -F',' '!seen[$1]++' file.csv





share|improve this answer












Try the below command,



awk -F',' '!seen[$1]++' file.csv






share|improve this answer












share|improve this answer



share|improve this answer










answered 19 mins ago









EBIN GLADSON

4156




4156











  • This does the opposite of what was asked. That is: it will print the first line and remove all following repeats.
    – Isaac
    2 mins ago
















  • This does the opposite of what was asked. That is: it will print the first line and remove all following repeats.
    – Isaac
    2 mins ago















This does the opposite of what was asked. That is: it will print the first line and remove all following repeats.
– Isaac
2 mins ago




This does the opposite of what was asked. That is: it will print the first line and remove all following repeats.
– Isaac
2 mins ago










Ian is a new contributor. Be nice, and check out our Code of Conduct.









 

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