diff --git a/backend/src/module/database/bangumi.py b/backend/src/module/database/bangumi.py
index 6d0919f5..97efe1b4 100644
--- a/backend/src/module/database/bangumi.py
+++ b/backend/src/module/database/bangumi.py
@@ -1,9 +1,6 @@
 import logging
 
 from module.database.orm import Connector
-
-from module.ab_decorator import locked
-from module.database.connector import DataConnector
 from module.models import BangumiData
 from module.conf import DATA_PATH
 
@@ -91,26 +88,10 @@ class BangumiDatabase(Connector):
         location = {"title_raw": title_raw}
         set_value = {"poster_link": poster_link}
         self.update.value(location, set_value)
-        # self._cursor.execute(
-        #     """
-        #     UPDATE bangumi
-        #     SET poster_link = :poster_link
-        #     WHERE title_raw = :title_raw
-        #     """,
-        #     {"poster_link": poster_link, "title_raw": title_raw},
-        # )
-        # self._conn.commit()
         logger.debug(f"[Database] Update {title_raw} poster_link to {poster_link}.")
 
     def delete_one(self, _id: int):
         self.delete.one(_id)
-        # self._cursor.execute(
-        #     """
-        #     DELETE FROM bangumi WHERE id = :id
-        #     """,
-        #     {"id": _id},
-        # )
-        # self._conn.commit()
         logger.debug(f"[Database] Delete bangumi id: {_id}.")
 
     def delete_all(self):
@@ -122,8 +103,6 @@ class BangumiDatabase(Connector):
 
     def search_id(self, _id: int) -> BangumiData | None:
         dict_data = self.select.one(conditions={"id": _id})
-        # condition = {"id": _id}
-        # dict_data = self._search_data(table_name=self.__table_name, condition=condition)
         if dict_data is None:
             logger.warning(f"[Database] Cannot find bangumi id: {_id}.")
             return None
diff --git a/backend/src/module/database/orm/connector.py b/backend/src/module/database/orm/connector.py
index d30088a9..255aa290 100644
--- a/backend/src/module/database/orm/connector.py
+++ b/backend/src/module/database/orm/connector.py
@@ -57,3 +57,6 @@ class Connector:
         if keys:
             return [dict(zip(keys, data)) for data in datas]
         return [dict(zip(self._columns, data)) for data in datas]
+
+    def fetch(self):
+        return self._cursor.fetchall()
diff --git a/backend/src/module/database/orm/update.py b/backend/src/module/database/orm/update.py
index 96dc8fa6..7b022418 100644
--- a/backend/src/module/database/orm/update.py
+++ b/backend/src/module/database/orm/update.py
@@ -9,6 +9,15 @@ class Update:
         self._table_name = table_name
         self._example_data = data
 
+    def __table_exists(self) -> bool:
+        self._connector.execute(
+            f"""
+            SELECT name FROM sqlite_master
+            WHERE type='table' AND name='{self._table_name}'
+            """
+        )
+        return self._connector.fetch() is not None
+
     def table(self):
         columns = ", ".join(
             [
@@ -18,8 +27,9 @@ class Update:
         )
         create_table_sql = f"CREATE TABLE IF NOT EXISTS {self._table_name} ({columns});"
         self._connector.execute(create_table_sql)
+        logger.debug(f"Create table {self._table_name}.")
         self._connector.execute(f"PRAGMA table_info({self._table_name})")
-        existing_columns = self._connector._columns
+        existing_columns = [x[1] for x in self._connector.fetch()]
         for key, value in self._example_data.items():
             if key not in existing_columns:
                 insert_column = self.__python_to_sqlite_type(value)
@@ -27,7 +37,7 @@ class Update:
                     value = "NULL"
                 add_column_sql = f"ALTER TABLE {self._table_name} ADD COLUMN {key} {insert_column} DEFAULT {value};"
                 self._connector.execute(add_column_sql)
-        logger.debug(f"Create / Update table {self._table_name}.")
+                logger.debug(f"Update table {self._table_name}.")
 
     def one(self, data: dict) -> bool:
         _id = data["id"]
diff --git a/backend/src/test/test_database.py b/backend/src/test/test_database.py
index f7fc94f5..31446ba3 100644
--- a/backend/src/test/test_database.py
+++ b/backend/src/test/test_database.py
@@ -28,6 +28,7 @@ def test_database():
     with BangumiDatabase(database=TEST_PATH) as database:
         # create table
         database.update_table()
+    with BangumiDatabase(database=TEST_PATH) as database:
         # insert
         database.insert_one(test_data)
         assert database.search_id(1) == test_data