Question

I have some CSV files where I need to delete all lines that contain a date that is greater than a specified date. How would I do this in PowerShell?

BTW: here is the date format: 09/29/2011

Example: I would want to delete all lines that contain the date greater than 09/29/2011.

Answer 1

 foreach ($file in gci *.csv){
   (gc $file) |
     ? {[datetime]$_.split('|')[1] -lt '09/29/2011'
     } | set-content $file

 }

Assuming that’s a pipe-delimited file.