Revise $rand operator documentation

Updated the $rand operator documentation with new examples and corrected metadata.

Author: abinav2307

articles/cosmos-db/mongodb/vcore/operators/miscellaneous-query/$rand.md

@@ -1,13 +1,13 @@
 ---
   title: $rand
-  titleSuffix: Overview of the $rand operation in Azure Cosmos DB for MongoDB (vCore)
+  titleSuffix: Overview of the $rand operator in Azure Cosmos DB for MongoDB (vCore)
   description: The $rand operator generates a random float value between 0 and 1.
   author: suvishodcitus
   ms.author: suvishod
   ms.service: azure-cosmos-db
   ms.subservice: mongodb-vcore
   ms.topic: language-reference
-  ms.date: 02/12/2025
+  ms.date: 09/04/2025
 ---
 
 # $rand
@@ -16,16 +16,130 @@ The `$rand` operator generates a random float value between 0 and 1. This is use
 
 ## Syntax
 
-The syntax for the `$rand` operator is as follows:
-
 ```javascript
-{ $rand: {} }
+{
+  $rand: {}
+}
 ```
 
 ## Examples
 
 Consider this sample document from the stores collection.
 
+```json
+{
+    "_id": "0fcc0bf0-ed18-4ab8-b558-9848e18058f4",
+    "name": "First Up Consultants | Beverage Shop - Satterfieldmouth",
+    "location": {
+        "lat": -89.2384,
+        "lon": -46.4012
+    },
+    "staff": {
+        "totalStaff": {
+            "fullTime": 8,
+            "partTime": 20
+        }
+    },
+    "sales": {
+        "totalSales": 75670,
+        "salesByCategory": [
+            {
+                "categoryName": "Wine Accessories",
+                "totalSales": 34440
+            },
+            {
+                "categoryName": "Bitters",
+                "totalSales": 39496
+            },
+            {
+                "categoryName": "Rum",
+                "totalSales": 1734
+            }
+        ]
+    },
+    "promotionEvents": [
+        {
+            "eventName": "Unbeatable Bargain Bash",
+            "promotionalDates": {
+                "startDate": {
+                    "Year": 2024,
+                    "Month": 6,
+                    "Day": 23
+                },
+                "endDate": {
+                    "Year": 2024,
+                    "Month": 7,
+                    "Day": 2
+                }
+            },
+            "discounts": [
+                {
+                    "categoryName": "Whiskey",
+                    "discountPercentage": 7
+                },
+                {
+                    "categoryName": "Bitters",
+                    "discountPercentage": 15
+                },
+                {
+                    "categoryName": "Brandy",
+                    "discountPercentage": 8
+                },
+                {
+                    "categoryName": "Sports Drinks",
+                    "discountPercentage": 22
+                },
+                {
+                    "categoryName": "Vodka",
+                    "discountPercentage": 19
+                }
+            ]
+        },
+        {
+            "eventName": "Steal of a Deal Days",
+            "promotionalDates": {
+                "startDate": {
+                    "Year": 2024,
+                    "Month": 9,
+                    "Day": 21
+                },
+                "endDate": {
+                    "Year": 2024,
+                    "Month": 9,
+                    "Day": 29
+                }
+            },
+            "discounts": [
+                {
+                    "categoryName": "Organic Wine",
+                    "discountPercentage": 19
+                },
+                {
+                    "categoryName": "White Wine",
+                    "discountPercentage": 20
+                },
+                {
+                    "categoryName": "Sparkling Wine",
+                    "discountPercentage": 19
+                },
+                {
+                    "categoryName": "Whiskey",
+                    "discountPercentage": 17
+                },
+                {
+                    "categoryName": "Vodka",
+                    "discountPercentage": 23
+                }
+            ]
+        }
+    ]
+}
+```
+
+### Example 1: Add a random value
+
+This query adds a random value to each store document. 
+
 ```javascript
 db.stores.aggregate([
    { 
@@ -38,9 +152,8 @@ db.stores.aggregate([
    { $limit: 2 }
 ])
 ```
-### Example 1: Add a random value
 
-This query adds a random value to each store document. When executed, it might return something like:
+The first two results returned by this query are:
 
 ```json
 [
@@ -66,3 +179,4 @@ This query adds a random value to each store document. When executed, it might r
 ## Related content
 
 [!INCLUDE[Related content](../includes/related-content.md)]
+