EHN: allow for to_sql multi method with oracle backend

Author: jacadzaca

doc/source/whatsnew/v2.1.0.rst

@@ -28,7 +28,7 @@ enhancement2
 
 Other enhancements
 ^^^^^^^^^^^^^^^^^^
--
+- to_sql with method 'multi' works with Oracle on the backend
 -
 
 .. ---------------------------------------------------------------------------

pandas/io/sql.py

@@ -960,8 +960,8 @@ def _execute_insert_multi(self, conn, keys: list[str], data_iter) -> int:
         from sqlalchemy import insert
 
         data = [dict(zip(keys, row)) for row in data_iter]
-        stmt = insert(self.table).values(data)
-        result = conn.execute(stmt)
+        stmt = insert(self.table)
+        result = conn.execute(stmt, data)
         return result.rowcount
 
     def insert_data(self) -> tuple[list[str], list[np.ndarray]]: