Practical/Assignment-B2/Queries-B2.md

@@ -28,19 +28,16 @@ db.Employee.aggregate([
 ```mongodb
 db.Employee.aggregate([
     {
-    $match: {
-      Designation: "Developer"
-    }
+        $match: { Designation: "Developer" }
     },
     {
         $group: {
-      _id: "$Address.PAddr",
-      Total: { $sum: "$Salary" }
+            _id: { $arrayElemAt: ["$Address.PAddr", 0] },
+            TotalSalary: { $sum: "$Salary" }
         }
     }
 ])
 
-
 ```
 
 3. Find Total Salary of Employee with Designation "Tester" for Each Company: