diff --git a/app/Http/Controllers/CommentController.php b/app/Http/Controllers/CommentController.php
index a1159e7..89fe0eb 100644
--- a/app/Http/Controllers/CommentController.php
+++ b/app/Http/Controllers/CommentController.php
@@ -6,8 +6,6 @@
 
 use App\Comment;
 
-use Illuminate\Support\Facades\DB;
-
 class CommentController extends Controller
 {
     public function create(Request $request)
diff --git a/app/Http/Controllers/TaskController.php b/app/Http/Controllers/TaskController.php
index f38c743..710fb5d 100644
--- a/app/Http/Controllers/TaskController.php
+++ b/app/Http/Controllers/TaskController.php
@@ -115,17 +115,20 @@ public function spotInfo($spotId)
                     AND `longitude`
                         BETWEEN '.$long.' - '.$radius.'/(69 * COS(RADIANS('.$lat.')))
                         AND '.$long.' + '.$radius.'/(69 * COS(RADIANS('.$lat.'))))r
-                    WHERE `distance` < '. $radius .'
-                    ORDER BY `distance` ASC');
-                return response()->json([
-                    'item' => $spotInfo,
-                    'comment' => $spotComment,
-                    'lat' => $lat,
-                    'long' => $long,
-                    // 'location' => $spotLocation,
-                    'Nearby' => $shopNearby,
-                    'commentTotal' => $commentTotal
-                ]);
+                    WHERE `distance` < '.$radius.'
+                    ORDER BY `distance` ASC'); //radius search with raw expression
+            $avgRate = 0;
+            foreach ($spotComment as $key => $value) {
+                if(isset($value->rating))
+                    $avgRate += $value->rating;
+                } //average rate calculate
+            return response()->json([
+                'item' => $spotInfo,
+                'comment' => $spotComment,
+                'Nearby' => $shopNearby,
+                'commentTotal' => $commentTotal,
+                'avgRate' => $avgRate/$commentTotal
+            ]);
         }
     }
 
@@ -212,15 +215,17 @@ public function shopInfo($shopId)
             ]);
         } else {
             $shopComment = Shop::find($shopId)->Comments()->latest()->get();
-            // $shopLocation = $shopInfo->pluck('location')->first();
-            // $spotNearBy = Shop::where('location', $shopLocation)->first()->get();
             $commentTotal = $shopComment->count();
+            $avgRate = 0;
+            foreach ($shopComment as $key => $value) {
+                if(isset($value->rating))
+                    $avgRate += $value->rating;
+                } //average rate calculate
             return response()->json([
                 'item' => $shopInfo,
                 'comment' => $shopComment,
-                // 'location' => $shopLocation,
-                // 'shopNearBy' => $spotNearBy
-                'commentTotal' => $commentTotal
+                'commentTotal' => $commentTotal,
+                'avgRate' => $avgRate/$commentTotal
             ]);
         }
     }
@@ -242,12 +247,10 @@ public function keywordSearch($keyword)
                             ->orWhere("content","LIKE","%".$decodeKeyword."%")
                             ->select(['id','title'])
                             ->paginate(15);
-
         //count the number of search results
         $spotTotal = $spotResult->count();
         $shopTotal = $shopResult->count();
         $articleTotal = $articleResult->count();
-
         return response()->json([
             'spot' => $spotResult,
             'shop' => $shopResult,
@@ -282,12 +285,12 @@ public function articleRandom()
     //display articles by category
     public function articleCategory($category)
     {
-            $categoryResult = Article::where("category", $category)->paginate(15); //Add pagination
-            $categoryTotal = $categoryResult->count(); //count the number of article category results
-            return response()->json([
-                'item' => $categoryResult,
-                'categoryTotal' => $categoryTotal
-            ]);
+        $categoryResult = Article::where("category", $category)->paginate(15); //Add pagination
+        $categoryTotal = $categoryResult->count(); //count the number of article category results
+        return response()->json([
+            'item' => $categoryResult,
+            'categoryTotal' => $categoryTotal
+        ]);
     }
 
     //show certain information of an article
@@ -295,8 +298,31 @@ public function articleInfo($articleId)
     {
         $articleInfo = Article::where("id", $articleId)->get();
         return response()->json([
-            'item' => $articleInfo,
+            'item' => $articleInfo
         ]);
     }
     /*==========article API end==========*/
+
+    /*==========DB update==========*/
+    public function shopRating()
+    {
+        $avgRate = 0;
+        $shopList = Shop::get();
+        foreach ($shopList as $key => $value) {
+            $shopComment = Shop::find($value->id)->Comments()->latest()->get();
+            // $result = array_merge($shopList, $shopComment);
+            foreach ($shopComment as $key => $value) {
+                if(isset($value->rating))
+                    $avgRate += $value->rating;//average rate calculate
+            }
+            return response()->json([
+                'item' => $shopComment,
+                'rating' => $avgRate
+            ]);
+        }
+        // return response()->json([
+        //     'item' => $shopList[0],
+        //     'comment' => $shopComment
+        // ]);
+    }
 }
diff --git a/routes/api.php b/routes/api.php
index 5c0ada3..4d3f489 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -40,6 +40,8 @@
 Route::delete("comment/{id}", "CommentController@destroy");
 /*==========comment API Route ==========*/
 
+Route::get("update", "TaskController@shopRating");
+
 Route::fallback(function(){
     return response()->json(['message' => 'Not Found!', 'code' => 404], 404);
 });