使用PowerShell对CSV文件中的列进行排序

Question

我有一个1600行的csv文件,下面给出了前十行

N,EQ,ADANIPORTS,ADANI PORT & SEZ LTD,384.5,385,387.8,375,376.75,792818726.1,2085488,Y, ,40850,452.35,350.45
N,EQ,ASIANPAINT,ASIAN PAINTS LIMITED,1394.75,1395,1411,1385.05,1393.5,1284559258,919355,Y, ,36117,1490.6,1090.1
N,EQ,AXISBANK,AXIS BANK LIMITED,631.75,638.05,643.4,634,639.9,9599936309,15035968,Y, ,144038,644.65,447.5
N,EQ,BAJAJ-AUTO,BAJAJ AUTO LIMITED,2685.55,2683.9,2697,2664,2682.25,1476618943,551229,Y, ,23611,3468.35,2605
N,EQ,BAJAJFINSV,BAJAJ FINSERV LTD.,7092.1,7092,7129,7025.25,7050.65,909166393.3,128111,Y, ,19707,7200,4500
N,EQ,BAJFINANCE,BAJAJ FINANCE LIMITED,2893.85,2892,2943.4,2891.05,2916.6,3884349778,1327710,Y, ,52356,2943.4,1511.2
N,EQ,BHARTIARTL,BHARTI AIRTEL LIMITED,369.9,370,370.8,365,368.95,768282183.8,2089422,Y, ,26515,564.8,331
N,EQ,BPCL,BHARAT PETROLEUM CORP LT,357.75,358.25,362,353.5,356.95,1738725370,4865929,Y, ,77863,551.55,353.5
N,EQ,CIPLA,CIPLA LTD,657.95,658,658,645,651.2,1235846442,1904031,Y, ,38575,665,507.2
N,EQ,COALINDIA,COAL INDIA LTD,289.05,287.85,293.6,287.8,291,791484837,2713583,Y, ,55421,316.95,235.85

我想按降序排列10列,以便我可以找到前20名.文件名是Pd240818.csv 我的powershell代码如下.

# To remove unwanted few lines

sls ",BE,",",EQ," .\Pd240818.csv | select -exp line | Where-Object {$_ -notmatch ',EQ, ,'} > .\temp.csv

#Sorting line is as follows

gc .\temp.csv | Where-Object {$_ -notmatch 'MKT,'}|%{$_.split(",")[9]}|Sort-Object -Descending| Select-Object -first 20 > temp.txt

排序

我得到temp.txt如下:

99988.7
99896.5
9989273.6
99769.75
996134.55
9933960.45
99228.65
99199.95
989418.15
988423057.7
9884111.1
98572145.2
982146.5
981497584.9
97982.75
9786178.9
9775915.05
9760482.5
97384498.85
971033.85

好像我在excel中对同一列进行排序,我得到如下.

28818819313
9599936309
8459873415
6175554483
5889553012
5690666055
5439638100
5121938441
5079530750
5042021707
4972762046
4889394601
4742835986
3884349778
3690976213
3486309023
3388956937
3336437125
3206801588
3114870807

我在哪里做错了.怎么纠正呢？

Answer 1

线索是看到不同长度的数字,所有数据都排序在一起:

这是一个常见的问题,数字按文本排序,而不是数字值 - 当我们对单词进行排序时,它们无关紧要,我们将所有内容放在a一起,然后将所有数据放在b一起......用数字进行排序并放入所有9在一起,然后所有8在一起,你看到这种不同的长度排序:

99896.5
9989273.6
99769.75

解决方案是将文本转换为数字,同时排序,然后他们将对值进行排序:

.. | Sort-Object -Descending -Property { $_ -as [decimal] } | ..

然后输出更像你想要的:

988423057.7
981497584.9
98572145.2
97384498.85
9989273.6