added timestamp to the file name

Author: Alexander Nosov

samples/manage/azure-hybrid-benefit/README.md

@@ -8,7 +8,7 @@ ms.date: 12/15/2020
 
 # Overview 
 
-This script is provided to help you manage the SQL Server licenses that are consumed by the SQL Servers deployed to Azure. The script's output is a `sql-license-usage.csv` file with the consolidated SQL Server license usage by all SQL resources in the specific subscriptions or the entire account. The usage is broken into the following license categories:
+This script is provided to help you manage the SQL Server licenses that are consumed by the SQL Servers deployed to Azure. The script's output is a `sql-license-usage_<timestamp>.csv` file with the consolidated SQL Server license usage by all SQL resources in the specific subscriptions or the entire account. By periodically generating the usage report you can track your license utilization over time. The usage is broken into the following license categories:
 
 - AHB Standard vCores
 - AHB Enterprise vCores

samples/manage/azure-hybrid-benefit/sql-license-usage.ps1

@@ -40,14 +40,19 @@ if ($args[0] -ne $null) {
     }
 }
 
+#Initialize arrays
 [System.Collections.ArrayList]$usage = @()
 if ($ec -eq $null){
     $usage += ,(@("Subscription Name", "Subscription ID", "AHB Std vCores", "AHB Ent vCores", "PAYG Std vCores", "PAYG Ent vCores", "HADR Std vCores", "HADR Ent vCores", "Developer vCores", "Express vCores"))
 }else{
     $usage += ,(@("Subscription Name", "Subscription ID", "AHB ECs", "PAYG ECs", "AHB Std vCores", "AHB Ent vCores", "PAYG Std vCores", "PAYG Ent vCores", "HADR Std vCores", "HADR Ent vCores", "Developer vCores", "Express vCores"))
 }
-$total = [pscustomobject]@{ahb_std=0; ahb_ent=0; payg_std=0; payg_ent=0; hadr_std=0; hadr_ent=0; developer=0; express=0}
 
+$subtotal = [pscustomobject]@{ahb_std=0; ahb_ent=0; payg_std=0; payg_ent=0; hadr_std=0; hadr_ent=0; developer=0; express=0}
+$total = [pscustomobject]@{}
+foreach( $property in $subtotal.psobject.properties.name ){
+    $total | Add-Member -MemberType NoteProperty -Name $property -Value 6
+}
 
 #Save the VM SKU table
 $VM_SKUs = Get-AzComputeResourceSku
@@ -66,9 +71,11 @@ foreach ($sub in $subscriptions){
         {continue}
     }
 
-    # Total counts of different license types 
-    $subtotal = [pscustomobject]@{ahb_std=0; ahb_ent=0; payg_std=0; payg_ent=0; hadr_std=0; hadr_ent=0; developer=0; express=0}
-
+    # Reset the subtotals     
+    foreach( $property in $subtotal.psobject.properties.name ){
+        $subtotal.$property = 0
+    }
+    
     #Get all logical servers
     $servers = Get-AzSqlServer 
 
@@ -231,7 +238,8 @@ foreach ($sub in $subscriptions){
         }
     }
 
-    foreach( $property in $total.psobject.properties.name ){
+    # Increment the totals and add subtotals to the usage array
+    foreach( $property in $subtotal.psobject.properties.name ){
         $total.$property += $subtotal.$property
     }
     if ($ec -eq $null){
@@ -249,6 +257,7 @@ if ($ec -eq $null){
 
 $table = ConvertFrom-Csv ($usage | %{ $_ -join ','} ) 
 $table | Format-table
+$fileName = '.\sql-license-usage_' + (Get-Date -f yyyy-MM-dd_HH-mm-ss) + '.csv'
 $table | Export-Csv .\sql-license-usage.csv -NoTypeInformation
 
 Write-Host ([Environment]::NewLine + "-- The usage data is saved to .\sql-license-usage.csv")