先看看原来两个文件的内容:
cat employee.txt
100 Jason Smith
200 John Doe
300 Sanjay Gupta
400 Ashok Sharma
cat bonus.txt
100 $5,000
200 $500
300 $3,000
400 $1,250
下面是合并后的内容:
# join employee.txt bonus.txt
100 Jason Smith $5,000
200 John Doe $500
300 Sanjay Gupta $3,000
400 Ashok Sharma $1,250
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