如何合并2个csv文件+所有内容+ cygwin / bash / awk / sed / paste

Question

如何合并2个CSV文件（finle1.csv和file2.csv）？ 我已经探索过awk / sed / paste，但它超出了我的范围。

file1.csv

Time,Object,Integrity,KPI 1-A Name A unit(unit/s),KPI 2-A Name B unit(unit/s)
2014-06-04 11:00,ObjectA,100%,0.0316,0.0012
2014-06-04 21:00,ObjectB,100%,40.0332,7.2601

file2.csv

Time,Object,Integrity,KPI 1-C Name A unit(unit),KPI 1-D Name A unit(unit)
2014-06-04,ObjectA,100%,0.024,0.0014
2014-06-04,ObjectB,100%,60.6176,29.0913

whatIwant.csv

Time,Object,Integrity,KPI 1-A Name A unit(unit/s),KPI 2-A Name B unit(unit/s),Time,Object,Integrity,KPI 1-C Name A unit(unit),KPI 1-D Name A unit(unit)
2014-06-04 11:00,ObjectA,100%,0.0316,0.0012,2014-06-04,ObjectA,100%,0.024,0.0014
2014-06-04 21:00,ObjectB,100%,40.0332,7.2601,2014-06-04,ObjectB,100%,60.6176,29.0913

注意：我假设时间，对象将相应地排列。

这将用于N行。

每个文件中的列数也可能会增加。

我可能必须从whatIwant.csv删除“第二时间”，“对象”，“完整性”列，但稍后可以执行此操作。

Answer 1

使用awk ：

awk -F, 'NR==FNR{a[$2]=$0;next}$2 in a{ print a[$2],$4, $5 }' OFS=, file1.csv file2.csv
Time,Object,Integrity,KPI 1-A Name A unit(unit/s),KPI 2-A Name B unit(unit/s),KPI 1-C Name A unit(unit),KPI 1-D Name A unit(unit)
2014-06-04 11:00,ObjectA,100%,0.0316,0.0012,0.024,0.0014
2014-06-04 21:00,ObjectB,100%,40.0332,7.2601,60.6176,29.0913

使用join ：

join -t, -j 2 -o 1.1 1.2 1.3 1.4 1.5 2.4 2.5 file1.csv file2.csv
Time,Object,Integrity,KPI 1-A Name A unit(unit/s),KPI 2-A Name B unit(unit/s),KPI 1-C Name A unit(unit),KPI 1-D Name A unit(unit)
2014-06-04 11:00,ObjectA,100%,0.0316,0.0012,0.024,0.0014
2014-06-04 21:00,ObjectB,100%,40.0332,7.2601,60.6176,29.0913

更新：

要加入日期和对象，您可以使用awk作为join只加入1列。

awk -F, 'NR==FNR{sub(/ .*/,"",$1);map[$1,$2]=$0;next}(($1,$2) in map){print map[$1,$2],$4,$5}' OFS=, f1 f2
Time,Object,Integrity,KPI 1-A Name A unit(unit/s),KPI 2-A Name B unit(unit/s),KPI 1-C Name A unit(unit),KPI 1-D Name A unit(unit)
2014-06-04,ObjectA,100%,0.0316,0.0012,0.024,0.0014
2014-06-04,ObjectB,100%,40.0332,7.2601,60.6176,29.0913