Add column to GroupNumeric/Date in PivotTables.

Examples/Grouping/GroupDateColumn.ps1

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+try {Import-Module $PSScriptRoot\..\..\ImportExcel.psd1} catch {throw ; return}
+
+#Get rid of pre-exisiting sheet
+$xlSourcefile = "$env:TEMP\ImportExcelExample.xlsx"
+Write-Verbose -Verbose -Message  "Save location: $xlSourcefile"
+Remove-Item $xlSourcefile -ErrorAction Ignore
+
+$PivotTableDefinition = New-PivotTableDefinition -Activate -PivotTableName Points `
+    -PivotRows Driver -PivotColumns Date -PivotData @{Points = "SUM"} -GroupDateColumn Date -GroupDatePart Years, Months
+
+Import-Csv "$PSScriptRoot\First10Races.csv" |
+    Select-Object Race, @{n = "Date"; e = {[datetime]::ParseExact($_.date, "dd/MM/yyyy", (Get-Culture))}}, FinishPosition, Driver, GridPosition, Team, Points |
+    Export-Excel $xlSourcefile -Show -AutoSize -PivotTableDefinition $PivotTableDefinition

Examples/Grouping/GroupNumericColumn.ps1

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+try {Import-Module $PSScriptRoot\..\..\ImportExcel.psd1} catch {throw ; return}
+
+#Get rid of pre-exisiting sheet
+$xlSourcefile = "$env:TEMP\ImportExcelExample.xlsx"
+Write-Verbose -Verbose -Message  "Save location: $xlSourcefile"
+Remove-Item $xlSourcefile -ErrorAction Ignore
+
+$PivotTableDefinition = New-PivotTableDefinition -Activate -PivotTableName Places `
+    -PivotRows Driver -PivotColumns FinishPosition -PivotData @{Date = "Count"} -GroupNumericColumn FinishPosition -GroupNumericMin 1 -GroupNumericMax 25 -GroupNumericInterval 3
+
+Import-Csv "$PSScriptRoot\First10Races.csv" |
+    Select-Object  Race, @{n = "Date"; e = {[datetime]::ParseExact($_.date, "dd/MM/yyyy", (Get-Culture))}}, FinishPosition, Driver, GridPosition, Team, Points |
+    Export-Excel $xlSourcefile -Show -AutoSize -PivotTableDefinition $PivotTableDefinition