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Removing first 4 characters from date field in csv file

Posted on 2016-10-19
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Last Modified: 2016-10-19
I have a csv that is an export from a student information system. Lets say field J is the student enrollment date. it comes out as 09/02/2012 i need to change it to just read 2012 (essentially losing the first four characters) for each line of J in the CSV file ?

Does anyone have a quick batch or VB script that would do something like that ?
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Question by:sattermc
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by:NVIT
ID: 41850858
Can you submit a sample csv file?
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by:oBdA
ID: 41850866
Batch can be tricky when handling text files containing special characters.
Powershell is safer (and not as nineties as VB Script).
If the csv has no header line, you need to provide at least the number of columns in the file.
Assuming the csv has a header line, and the column is called "J":
$ColumnHeader = "J"
Get-Content C:\Temp\Input.csv | % {$_.$ColumnHeader = ($_.$ColumnHeader).Split('/')[2]; $_} | Export-Csv C:\Temp\Output.csv -NoTypeInformation

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And you'd lose the first 6 characters ...
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by:sattermc
ID: 41850884
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Expert Comment

by:oBdA
ID: 41850904
This will add quotes around the fields as well; is that a problem?
Import-Csv -Path C:\Temp\Input.csv -Header (1..17 | % {"Col_$($_)"}) |
	ForEach-Object {$_.Col_10 = ($_.Col_10).Split('/')[2]; $_} | 
	Export-Csv C:\Temp\Output.csv -NoTypeInformation

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Author Comment

by:sattermc
ID: 41850918
with ps script get "You cannot call a method on a null-valued expression."

script i'm running is:
$ColumnHeader = "m"
Get-Content d:\ioeducation\iostudent.csv | % {$_.$ColumnHeader = ($_.$ColumnHeader).Split('/')[2]; $_} | Export-Csv D:\ioeducation\student1.csv -NoTypeInformation

quotes would be a problem
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Accepted Solution

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oBdA earned 500 total points
ID: 41850948
Try this then:
$InputFile = "C:\Temp\Input.csv"
$OutputFile = "C:\Temp\Output.csv"
Import-Csv -Path $InputFile -Header (1..17 | % {"Col_$($_)"}) |
	ForEach-Object {$_.Col_10 = ($_.Col_10).Split('/')[2]; $_} | 
	ConvertTo-Csv -NoTypeInformation |
	Select-Object -Skip 1 |
	ForEach-Object {$_ -replace '"', ''} |
	Set-Content -Path $OutputFile

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Alternative, string-based split:
$InputFile = "C:\Temp\Input.csv"
$OutputFile = "C:\Temp\Output.csv"
Get-Content -Path $InputFile |
	ForEach-Object {
		$Cols = $_.Split(',')
		$Cols[9] = $Cols[9].Split('/')[2]
		$Cols -join ','
	} |
	Set-Content -Path $OutputFile

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Author Closing Comment

by:sattermc
ID: 41850971
Perfect,

Thank you
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