Merge pull request #236992 from mbrat2005/arg-casing-note

Resource Graph Casing Inconsistency Note

Author: prmerger-automator[bot]

articles/governance/resource-graph/concepts/explore-resources.md

@@ -11,6 +11,13 @@ Azure Resource Graph provides the ability to explore and discover your Azure res
 at scale. Engineered for fast responses, it's a great way to learn about your environment and also
 about the properties that exist on your Azure resources.
 
+> [!NOTE]
+> Depending on the Resource Graph table, properties will either match the casing as shown in the Azure portal or be lowercased. 
+> For example, the name of a resource group when querying the `resourceContainers` table will match the portal, but the 
+> `resourceGroup` property of resources from the `resources` table will be lowercase. This may cause unexpected results and 
+> can be accounted for in your queries using case-insensitive comparison operators such as `=~` instead of `==` and 
+> converting properties to lowercase in joins with the `tolower()` function. 
+
 ## Explore virtual machines
 
 A common resource in Azure is a virtual machine. As a resource type, virtual machines have many