diff --git a/sql/snowflake/SnowflakeParser.g4 b/sql/snowflake/SnowflakeParser.g4
index 46c62afa7e..ff8addd993 100644
--- a/sql/snowflake/SnowflakeParser.g4
+++ b/sql/snowflake/SnowflakeParser.g4
@@ -3644,6 +3644,7 @@ non_reserved_words
     | NAME
     | NETWORK
     | OFFSET
+    | OLD
     | ON_CREATE
     | ON_ERROR
     | ON_SCHEDULE
@@ -3681,6 +3682,7 @@ non_reserved_words
     | SCALE
     | SECURITYADMIN
     | SOURCE
+    | START_DATE
     | STATE
     | STATS
     | SYSADMIN
@@ -3953,6 +3955,7 @@ asc_desc
 over_clause
     : OVER '(' partition_by order_by_expr? ')'
     | OVER '(' order_by_expr ')'
+    | OVER '(' ')'
     ;
 
 function_call
@@ -4084,6 +4087,7 @@ select_statement_in_parentheses
     : LR_BRACKET select_statement_in_parentheses RR_BRACKET
     | select_statement_in_parentheses set_operators
     | select_statement
+    | with_expression
     ;
 
 select_optional_clauses
diff --git a/sql/snowflake/examples/select.sql b/sql/snowflake/examples/select.sql
index d6fa9b2593..cd4e3878d7 100644
--- a/sql/snowflake/examples/select.sql
+++ b/sql/snowflake/examples/select.sql
@@ -110,3 +110,19 @@ union
 (((select 10 as c)))
 union
 ((select 11 as d));
+
+SELECT SUM(cs) OVER() AS ta FROM t;
+
+SELECT old, start_date from t;
+
+
+with a as (
+    with b as (
+        select 't' as c
+    )
+    (select * from b)
+    union
+    (select * from b)
+)
+select *
+from a;
\ No newline at end of file