diff --git a/rds_mysql/stored_procedure/src05/src05_create_function.sql b/rds_mysql/stored_procedure/src05/src05_create_function.sql
new file mode 100644
index 00000000..e4e8cba3
--- /dev/null
+++ b/rds_mysql/stored_procedure/src05/src05_create_function.sql
@@ -0,0 +1,19 @@
+-- 処理日取得（date型）
+delimiter //
+CREATE FUNCTION src05.get_syor_date()
+RETURNS date DETERMINISTIC
+BEGIN
+    RETURN (SELECT STR_TO_DATE(syor_date,'%Y%m%d') FROM src05.hdke_tbl);
+END
+//
+delimiter;
+
+-- 年月を日付加工（date型）
+delimiter //
+CREATE FUNCTION src05.to_date_yyyymm01(yyyymm varchar(6))
+RETURNS date DETERMINISTIC
+BEGIN
+    RETURN (STR_TO_DATE(CONCAT(yyyymm,'01'),'%Y%m%d'));
+END
+//
+delimiter;