性能修复：join-t，-j99 file2 file1 | awk-F，-v OFS=，'$3==$6&&$4==$8{打印$2、$3、$4、$5、$7、$9}'；

文件1

文件2

输出：

2017,111,560,0.0537
2018,111,560,0.0296
2019,111,560,0.0624

对于文件1，我有31000行 对于文件2，我有130万行

处理文件需要很长时间。 此命令正在unix中运行

有人能帮忙吗？提前谢谢你

你可以试试这个

2017,111,560,0.0537,222,0.7
2017,111,560,0.0537,333,0.2
2017,111,560,0.0537,444,0.1
2018,111,560,0.0296,222,0.7
2018,111,560,0.0296,333,0.2
2018,111,560,0.0296,444,0.1
2019,111,560,0.0624,222,0.7
2019,111,560,0.0624,333,0.2
2019,111,560,0.0624,444,0.1

---

结果是一样的，但应该更快。

另一个

awk/join

 join -t, -1 2 -2 1 file2 file1  | awk -F, -v OFS=, '{print $2, $1, $3, $4, $5, $7}'

---

$join-t，带GNU join:
join-t，-12-21 file2 file1-o 1.1,1.2,2.3,1.4,2.2,2.4
表示文件1中的第2列和文件2中的第1列将确定联接
 join -t, -1 2 -2 1 file2 file1  | awk -F, -v OFS=, '{print $2, $1, $3, $4, $5, $7}'

$ join -t, <(awk -F, '{print $2"_"$3 FS $0}' f2 | sort) \
           <(awk -F, '{print $1"_"$3 FS $2 FS $4}' f1 | sort) | cut -d, -f2-

2017,111,560,0.0537,222,0.7
2017,111,560,0.0537,333,0.2
2017,111,560,0.0537,444,0.1
2018,111,560,0.0296,222,0.7
2018,111,560,0.0296,333,0.2
2018,111,560,0.0296,444,0.1
2019,111,560,0.0624,222,0.7
2019,111,560,0.0624,333,0.2
2019,111,560,0.0624,444,0.1