diff --git a/notes/SQL 练习.md b/notes/SQL 练习.md
index 464a8cfd..1f6b3355 100644
--- a/notes/SQL 练习.md	
+++ b/notes/SQL 练习.md	
@@ -764,7 +764,7 @@ VALUES
 ### Solution
 
 ```sql
-CREATE FUNCTION getNthHighestSalary ( N INT ) RETURNS INT BEGIN
+CREATE FUNCTION getNthHighestSalary ( N INT ) RETURNS INT READS SQL DATA BEGIN
 
 SET N = N - 1;
 RETURN (