diff --git a/docs-2.0/3.ngql-guide/8.clauses-and-options/order-by.md b/docs-2.0/3.ngql-guide/8.clauses-and-options/order-by.md
index cf15dbda11b..be04274060a 100644
--- a/docs-2.0/3.ngql-guide/8.clauses-and-options/order-by.md
+++ b/docs-2.0/3.ngql-guide/8.clauses-and-options/order-by.md
@@ -93,22 +93,22 @@ nGQL lists NULL values at the end of the output for ascending sorting, and at th
 nebula> MATCH (v:player{name:"Tim Duncan"}) --> (v2) \
         RETURN v2.player.name AS Name, v2.player.age AS Age  \
         ORDER BY Age;
-+-----------------+--------------+
-| Name            | Age          |
-+-----------------+--------------+
-| "Tony Parker"   | 36           |
-| "Manu Ginobili" | 41           |
-| "Spurs"         | UNKNOWN_PROP |
-+-----------------+--------------+
++-----------------+----------+
+| Name            | Age      |
++-----------------+----------+
+| "Tony Parker"   | 36       |
+| "Manu Ginobili" | 41       |
+| __NULL__        | __NULL__ |
++-----------------+----------+
 
 nebula> MATCH (v:player{name:"Tim Duncan"}) --> (v2) \
         RETURN v2.player.name AS Name, v2.player.age AS Age  \
         ORDER BY Age DESC;
-+-----------------+--------------+
-| Name            | Age          |
-+-----------------+--------------+
-| "Spurs"         | UNKNOWN_PROP |
-| "Manu Ginobili" | 41           |
-| "Tony Parker"   | 36           |
-+-----------------+--------------+
++-----------------+----------+
+| Name            | Age      |
++-----------------+----------+
+| __NULL__        | __NULL__ |
+| "Manu Ginobili" | 41       |
+| "Tony Parker"   | 36       |
++-----------------+----------+
 ```