Question

我有两个格式如下的文件：

file1：

Sub_amount , date/time

12  ,    2018040412   
78  ,    2018040413   
26  ,    2018040414

file2：

Unsub_amount , date/time   
76     , 2018040412   
98     , 2018040413   
56     , 2018040414

我需要的是，将file2从右边追加到file1。我的意思是：

Sub_amount, Unsub_amount , date/time   
12      ,       76      , 2018040412    
78       ,       98      , 2018040413   
26       ,       56      , 2018040414

最后，需要显示的是：

date/time , Unsub_amount , Sub_amount  
2018040412, 76 , 12  
2018040413, 98 , 78  
2018040414, 26 , 56

如果有人能支持，我将不胜感激:) 感谢。

Answer 1

我会用awk：

awk -F'[[:blank:]]*,[[:blank:]]*'  -v OFS="," '
    # remove leading and trailing blanks from the line
    { gsub(/^[[:blank:]]+|[[:blank:]]+$/, "") }

    # skip empty lines
    /^$/ { next }

    # store the Sub values from file1
    NR == FNR { sub_amt[$2] = $1; next }

    # print the data from file2, matching the cached value from file1
    { print $2, $1, sub_amt[$2] }
' file1 file2

date/time,Unsub_amount,Sub_amount
2018040412,76,12
2018040413,98,78
2018040414,56,26

Answer 2

编辑：不像awk解决方案那样酷或工作得很好，但另类。修剪列（使用sed）并提取它们（使用剪切），然后连接它们（使用粘贴）。假设行匹配。快乐的编码！

#!/usr/bin/env sh
# copy this code
# pbpaste > csv-col-merge.sh # paste/create the file
# chmod u+x csv-col-merge.sh # make it executable
# ./csv-col-merge.sh --gen-example
# ./csv-col-merge.sh demo/subs.csv demo/unsubs.csv demo/combined.csv
# 
# learn more:
# - "paste": https://askubuntu.com/questions/616166/how-can-i-merge-files-on-a-line-by-line-basis
# - "<<- EOF": https://stackoverflow.com/questions/2953081/how-can-i-write-a-heredoc-to-a-file-in-bash-script
# - "$_": https://unix.stackexchange.com/questions/271659/vs-last-argument-of-the-preceding-command-and-output-redirection
# - "cat -": https://stackoverflow.com/questions/14004756/read-stdin-in-function-in-bash-script
# - "cut -d ',' -f 1": split lines with ',' and take the first column, see "man cut"
# - "sed -E 's/find/replace/g'"; -E for extended regex, for ? (optional) support, see "man sed"
# - 

# --gen-example
if [ "$1" = '--gen-example' ]; then
    mkdir -p demo && cd $_

    cat <<- EOF > subs.csv
    sub_amount, date/time
    12, 2018040412
    78, 2018040413
    26, 2018040414
    EOF

    cat <<- EOF > unsubs.csv
    unsub_amount, date/time
    76, 2018040412
    98, 2018040413
    56, 2018040414
    EOF

    exit
fi

# load
trim () { cat - | sed -E 's/ ?, ?/,/g'; }
subs="$(cat "$1" | trim)"
unsubs="$(cat "$2" | trim)"
combined=$3

# intermediate
getcol () { cut -d ',' -f $1; }
col_subs="$(echo "$subs" | getcol 1)"
col_unsubs="$(echo "$unsubs" | getcol 1)"

col_subs_date="$(echo "$subs" | getcol 2)"
col_unsubs_date="$(echo "$unsubs" | getcol 2)"
if [ ! "$col_subs_date" = "$col_unsubs_date" ]; then echo 'Make sure date col match up'; exit; fi

# process
mkdir tmp
echo "$col_subs_date" > tmp/a
echo "$col_unsubs" > tmp/b
echo "$col_subs" > tmp/c
paste -d ',' < tmp/a tmp/b tmp/c
rm -rf tmp

将数据从一个文件追加到右侧

2 个答案: