Use PowerShell to Mass Delete Resource Groups

Do not do this in production systems, you can use this for clearing up old test resource groups.

1. Open Azure Portal https://portal.azure.com
2. Click on Resource Groups
3. Select the Resource Groups that you want to delete
4. Click “Assign tags”
5. Assign name "deleteme"
6. Open PowerShell

In PowerShell

1. az login
   
2. az account set -s "yoursubid"
   
3. az group list --tag deleteme --query [].name -o tsv | ForEach-Object {az group delete --no-wait -n $_}
4. The script will start executing after you have confirmed "y" for every group
5. You can amend point 3 above if you want to bypass individual "y" to delete step