Question

我有2个文件，其中包含超过1000万行，我想以有效的方式比较这2个文件，在我的情况下，我试图使用 awk 获得以下答案，我是坚持获得修改内容部分

Sample FIle (a1.txt)
A,1
B,2
C,3
D,4

Sample FIle (b1.txt)   
B,2
C,55 <- Mod data
D,4
E,5  <- new data
F,6  <- new data
Z,11 <- new data

* ** A，1删除和修改仅适用于第2列

这是我的代码和预期输出

新增内容 - 工作正常

awk -F',' 'NR==FNR{++a[$1];next} {line++;if(!(a[$1])){print $0}}' a1.txt b1.txt 

E,5
F,6
Z,11

已删除的内容 - 正常运行

awk -F',' 'NR==FNR{++a[$1];next} {line++;if(!(a[$1])){print $0}}' b1.txt a1.txt

A,1

修改内容

awk -F',' 'NR==FNR{++a[$2];next} {line++;if(!(a[$2])){print $0}}' a1.txt b1.txt

当前输出（不需要）

C,55
E,5
F,6
Z,11

但需要输出

C,55

这将返回bot新增内容+修改内容

请帮我解决这个问题

Answer 1

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<html>

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使用awk提取修改的文件内容

1 个答案: