diff --git a/solution/0500-0599/0584.Find Customer Referee/README.md b/solution/0500-0599/0584.Find Customer Referee/README.md
index 08d7abd1b0d7c..454975c03b00a 100644
--- a/solution/0500-0599/0584.Find Customer Referee/README.md	
+++ b/solution/0500-0599/0584.Find Customer Referee/README.md	
@@ -45,7 +45,12 @@
 ### **SQL**
 
 ```sql
-
+SELECT 
+    name
+FROM
+    Customer
+WHERE
+    referee_id != 2 OR referee_id IS NULL;
 ```
 
 <!-- tabs:end -->
diff --git a/solution/0500-0599/0584.Find Customer Referee/README_EN.md b/solution/0500-0599/0584.Find Customer Referee/README_EN.md
index a438a63201037..9b0c8ec4c5aa8 100644
--- a/solution/0500-0599/0584.Find Customer Referee/README_EN.md	
+++ b/solution/0500-0599/0584.Find Customer Referee/README_EN.md	
@@ -60,7 +60,12 @@ Customer table:
 ### **SQL**
 
 ```sql
-
+SELECT 
+    name
+FROM
+    Customer
+WHERE
+    referee_id != 2 OR referee_id IS NULL;
 ```
 
 <!-- tabs:end -->
diff --git a/solution/0500-0599/0584.Find Customer Referee/Solution.sql b/solution/0500-0599/0584.Find Customer Referee/Solution.sql
new file mode 100644
index 0000000000000..571f160a30900
--- /dev/null
+++ b/solution/0500-0599/0584.Find Customer Referee/Solution.sql	
@@ -0,0 +1,6 @@
+SELECT 
+    name
+FROM
+    Customer
+WHERE
+    referee_id != 2 OR referee_id IS NULL;