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in Technique[技术] by (100 points)

Extract multiple columns with no duplicate data with bash on linux

Hi all, i have a csv file like this: 

ecStudentID,StudentNetworkUsername,StudentName,StudentFirstName

100,ASTDTBJ001,"Andrew,Logan Connor",Logan

100,ASTDTBJ001,"Andrew,Logan Connor",Logan

101,BSTLTAN001,"Isaac,Matthew ",Matthew  

with bash how can I get column ID and first name without the duplicate. Example:

 ecStudentID,StudentFirstName

100,Logan

101,Matthew

Thank in advance 

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