Remove row of first duplicated column 1 from csv

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP











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












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.









share|improve this question




share|improve this question








edited 4 mins ago









Isaac

8,92211342




8,92211342






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.









asked 25 mins ago









Ian

1




1




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.





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





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










Your Answer








StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "106"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);

else
createEditor();

);

function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);



);






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









 

draft saved


draft discarded


















StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f479304%2fremove-row-of-first-duplicated-column-1-from-csv%23new-answer', 'question_page');

);

Post as a guest

















1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes








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.









 

draft saved


draft discarded


















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












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











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













 


draft saved


draft discarded














StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f479304%2fremove-row-of-first-duplicated-column-1-from-csv%23new-answer', 'question_page');

);

Post as a guest
































































-

Popular posts from this blog

How to check contact read email or not when send email to Individual?

Image
Clash Royale CLAN TAG #URR8PPP up vote 1 down vote favorite I'm using WordPress 4.9.8, CiviCRM to 5.5.1, I usually send email to contact by Search> Find contacts View contact details Action> Send email Send email ok, Contact received mail ok like picture But status only Email sent though contact read email or not. So, can CiviCRM can change status to Email read when contact read email? wordpress email share | improve this question asked Sep 26 at 0:12 ToanLuong 49 9 add a comment  |  up vote 1 down vote favorite I'm using WordPress 4.9.8, CiviCRM to 5.5.1, I usually send email to contact by Search> Find contacts View contact details Action> Send email Send email ok, Contact received mail ok like picture But status only Email sent though contact read email or not. So, can CiviCRM can change status to Email read when contact read email? wordpress email share | improve this questi...
Read more

Displaying single band from multi-band raster using QGIS

Image
Clash Royale CLAN TAG #URR8PPP 1 How can I extract a single band from multi-band raster in QGIS? I have an remote sensed image which has 6 bands (including NDVI band), I want to display each band separately, but have no idea how to do. I have seen some questions similar here but none worked for me. The original image (has 6 bands) is: I want to display the band 6 which should be like this: But I tried gdal_translate, and couldn't get the correct result. What I have got is: qgis raster multi-band share | improve this question edited Mar 5 at 0:53 Summer asked Mar 4 at 6:42 Summer Summer 23 6 Is this any help gis.stackexchange.com/questions/220658/… ? if not gis.stackexchange.com/questions/62133/… might help. – Michael Stimson Mar 4 at 6:46 Thanks for answering but when I used gdal_translate, qgis showed that 'Error 4: Kayena.tif: No such file or directory". Would you know how to fi...
Read more

How many registers does an x86_64 CPU actually have?

Image
Clash Royale CLAN TAG #URR8PPP up vote 2 down vote favorite I am currently learning reverse engineering and am studying the flags register. I had in my mind that rflags was just another name for one of the 16 general purpose registers, for example rax or rbx . But it looks like rflags is actually an additional register. So that makes 17 registers in total... how many more could there be? I have spent at least an hour on this and found numerous different answers. The best answer so far is this, which says that there are 40 registers in total. 16 General Purpose Registers 2 Status Registers 6 Code Segment Registers 16 SSE Registers 8 FPU/MMX Registers But if I add that up, I get 48. Could anybody provide an official answer on how many registers an x86_64 CPU has (e.g. an Intel i7). Additionally, I have seen references to 'hardware' and 'architectural' registers. What are those registers and how many are there? register x86-64 share | improve this...
Read more