''' powershell:sp2.ps1
$csvFiles = Get-ChildItem . *.csv -rec
foreach ($file in $csvFiles)
{
(Get-Content $file.PSPath) |
Foreach-Object { $_ -replace "201706", "201707" } |
Set-Content $file.PSPath
}
Get-ChildItem *.csv | Rename-Item -NewName { $_.Name -replace '201706','201707' }
'''