diff --git a/frontend/src/components/Sidebar.locate-toolbar.test.tsx b/frontend/src/components/Sidebar.locate-toolbar.test.tsx
index 94b0694..06b19dd 100644
--- a/frontend/src/components/Sidebar.locate-toolbar.test.tsx
+++ b/frontend/src/components/Sidebar.locate-toolbar.test.tsx
@@ -762,6 +762,31 @@ describe('Sidebar locate toolbar', () => {
     expect(markup).toContain('删除连接');
   });
 
+  it('omits unsupported database management actions for Oracle-like connection and database menus', () => {
+    const connectionMarkup = renderToStaticMarkup(
+      <V2ConnectionContextMenuView
+        connectionName="dm-prod"
+        hostSummary="10.0.0.10:5236"
+        driverLabel="dameng"
+        supportsCreateDatabase={false}
+      />,
+    );
+    const databaseMarkup = renderToStaticMarkup(
+      <V2DatabaseContextMenuView
+        dbName="SYSDBA"
+        dialect="dm"
+        supportsRenameDatabase={false}
+        supportsDropDatabase={false}
+      />,
+    );
+
+    expect(connectionMarkup).not.toContain('新建数据库');
+    expect(databaseMarkup).not.toContain('重命名数据库');
+    expect(databaseMarkup).not.toContain('删除数据库 · DROP');
+    expect(databaseMarkup).toContain('刷新对象树');
+    expect(databaseMarkup).toContain('关闭数据库');
+  });
+
   it('renders the v2 table group menu with sort state', () => {
     const markup = renderToStaticMarkup(
       <V2TableGroupContextMenuView
diff --git a/frontend/src/components/Sidebar.tsx b/frontend/src/components/Sidebar.tsx
index a5d6b79..61b351f 100644
--- a/frontend/src/components/Sidebar.tsx
+++ b/frontend/src/components/Sidebar.tsx
@@ -55,6 +55,7 @@ import { getTableDataDangerActionMeta, supportsTableTruncateAction, type TableDa
 import { useAutoFetchVisibility } from '../utils/autoFetchVisibility';
 import FindInDatabaseModal from './FindInDatabaseModal';
 import { buildRpcConnectionConfig } from '../utils/connectionRpcConfig';
+import { getDataSourceCapabilities } from '../utils/dataSourceCapabilities';
 import { noAutoCapInputProps } from '../utils/inputAutoCap';
 import { normalizeSidebarViewName, resolveSidebarRuntimeDatabase } from '../utils/sidebarMetadata';
 import { buildStarRocksMaterializedViewPreviewSql } from './tableDesignerSchemaSql';
@@ -5422,12 +5423,15 @@ const Sidebar: React.FC<{
 
   const renderV2DatabaseContextMenu = (node: any) => {
       const dialect = getMetadataDialect(node.dataRef as SavedConnection);
+      const capabilities = getDataSourceCapabilities((node.dataRef as SavedConnection)?.config);
       return (
           <V2DatabaseContextMenuView
               dbName={String(node.dataRef?.dbName || node.title || '')}
               dialect={dialect}
               supportsSchemaActions={isPostgresSchemaDialect(dialect)}
               supportsStarRocksActions={dialect === 'starrocks'}
+              supportsRenameDatabase={capabilities.supportsRenameDatabase}
+              supportsDropDatabase={capabilities.supportsDropDatabase}
               onAction={(action) => {
                   setContextMenu(null);
                   handleV2DatabaseContextMenuAction(node, action);
@@ -5438,6 +5442,7 @@ const Sidebar: React.FC<{
 
   const renderV2ConnectionContextMenu = (node: any) => {
       const conn = node.dataRef as SavedConnection;
+      const capabilities = getDataSourceCapabilities(conn?.config);
       const currentTagId = connectionTags.find((tag) => tag.connectionIds.includes(String(conn.id || node.key)))?.id || '';
       return (
           <V2ConnectionContextMenuView
@@ -5445,6 +5450,7 @@ const Sidebar: React.FC<{
               hostSummary={resolveConnectionHostSummary(conn?.config)}
               driverLabel={resolveConnectionIconType(conn)}
               isRedis={conn?.config?.type === 'redis'}
+              supportsCreateDatabase={capabilities.supportsCreateDatabase}
               tags={connectionTags.map((tag) => ({
                   id: tag.id,
                   name: tag.name,
@@ -6056,8 +6062,9 @@ const Sidebar: React.FC<{
         });
 
         // Regular database connection menu
+        const connectionCapabilities = getDataSourceCapabilities((node.dataRef as SavedConnection)?.config);
         return [
-            {
+            ...(connectionCapabilities.supportsCreateDatabase ? [{
                 key: 'new-db',
                 label: '新建数据库',
                 icon: <DatabaseOutlined />,
@@ -6065,7 +6072,7 @@ const Sidebar: React.FC<{
                     setTargetConnection(node);
                     setIsCreateDbModalOpen(true);
                 }
-            },
+            }] : []),
             {
                 key: 'refresh',
                 label: '刷新',
@@ -6235,8 +6242,11 @@ const Sidebar: React.FC<{
             }
         ];
     } else if (node.type === 'database') {
-       const isStarRocks = getMetadataDialect(node.dataRef as SavedConnection) === 'starrocks';
-       const supportsSchemaActions = isPostgresSchemaDialect(getMetadataDialect(node.dataRef as SavedConnection));
+       const databaseConn = node.dataRef as SavedConnection;
+       const dialect = getMetadataDialect(databaseConn);
+       const capabilities = getDataSourceCapabilities(databaseConn?.config);
+       const isStarRocks = dialect === 'starrocks';
+       const supportsSchemaActions = isPostgresSchemaDialect(dialect);
        return [
            {
                key: 'new-table',
@@ -6266,13 +6276,13 @@ const Sidebar: React.FC<{
                    onClick: () => openCreateStarRocksExternalCatalog(node)
                },
            ] : []),
-           {
+           ...(capabilities.supportsRenameDatabase ? [{
                key: 'rename-db',
                label: '重命名数据库',
                icon: <EditOutlined />,
                onClick: () => handleV2DatabaseContextMenuAction(node, 'rename-db')
-           },
-           {
+           }] : []),
+           ...(capabilities.supportsDropDatabase ? [{
                key: 'danger-zone',
                label: '危险操作',
                icon: <WarningOutlined />,
@@ -6285,7 +6295,7 @@ const Sidebar: React.FC<{
                        onClick: () => handleV2DatabaseContextMenuAction(node, 'drop-db')
                    }
                ]
-           },
+           }] : []),
            {
                key: 'refresh',
                label: '刷新',
diff --git a/frontend/src/components/V2TableContextMenu.tsx b/frontend/src/components/V2TableContextMenu.tsx
index 8fd19cc..5f8465d 100644
--- a/frontend/src/components/V2TableContextMenu.tsx
+++ b/frontend/src/components/V2TableContextMenu.tsx
@@ -304,12 +304,16 @@ export const V2DatabaseContextMenuView: React.FC<{
   dialect?: string;
   supportsSchemaActions?: boolean;
   supportsStarRocksActions?: boolean;
+  supportsRenameDatabase?: boolean;
+  supportsDropDatabase?: boolean;
   onAction?: (action: V2DatabaseContextMenuActionKey) => void;
 }> = ({
   dbName,
   dialect,
   supportsSchemaActions = false,
   supportsStarRocksActions = false,
+  supportsRenameDatabase = true,
+  supportsDropDatabase = true,
   onAction,
 }) => {
   const renderItems = (items: V2TableContextMenuItemConfig[]) => renderV2ContextMenuItems(
@@ -346,7 +350,7 @@ export const V2DatabaseContextMenuView: React.FC<{
 
         <div className="gn-v2-context-menu-section-title">维护</div>
         {renderItems([
-          { action: 'rename-db', icon: <EditOutlined />, title: '重命名数据库', kbd: 'F2' },
+          ...(supportsRenameDatabase ? [{ action: 'rename-db', icon: <EditOutlined />, title: '重命名数据库', kbd: 'F2' }] : []),
           { action: 'refresh', icon: <ReloadOutlined />, title: '刷新对象树' },
           { action: 'disconnect-db', icon: <DisconnectOutlined />, title: '关闭数据库' },
         ])}
@@ -358,7 +362,7 @@ export const V2DatabaseContextMenuView: React.FC<{
         ])}
 
         <div className="gn-v2-context-menu-divider" />
-        {renderItems([
+        {supportsDropDatabase && renderItems([
           { action: 'drop-db', icon: <DeleteOutlined />, title: '删除数据库 · DROP', tone: 'danger', kbd: '⌫' },
         ])}
       </div>
@@ -431,6 +435,7 @@ export const V2ConnectionContextMenuView: React.FC<{
   hostSummary?: string;
   driverLabel?: string;
   isRedis?: boolean;
+  supportsCreateDatabase?: boolean;
   tags?: V2ConnectionContextMenuTagItem[];
   onAction?: (action: V2ConnectionContextMenuActionKey) => void;
 }> = ({
@@ -438,6 +443,7 @@ export const V2ConnectionContextMenuView: React.FC<{
   hostSummary,
   driverLabel,
   isRedis = false,
+  supportsCreateDatabase = true,
   tags = [],
   onAction,
 }) => {
@@ -466,7 +472,7 @@ export const V2ConnectionContextMenuView: React.FC<{
           { action: 'new-command', icon: <ConsoleSqlOutlined />, title: '新建命令窗口', featured: true },
           { action: 'open-monitor', icon: <DashboardOutlined />, title: 'Redis 实例监控' },
         ]) : renderItems([
-          { action: 'new-db', icon: <DatabaseOutlined />, title: '新建数据库', kbd: '⌘N', featured: true },
+          ...(supportsCreateDatabase ? [{ action: 'new-db' as const, icon: <DatabaseOutlined />, title: '新建数据库', kbd: '⌘N', featured: true }] : []),
           { action: 'refresh', icon: <ReloadOutlined />, title: '刷新连接', kbd: '⌘R' },
           { action: 'new-query', icon: <ConsoleSqlOutlined />, title: '新建查询' },
           { action: 'open-sql-file', icon: <FileAddOutlined />, title: '运行外部 SQL 文件' },
diff --git a/frontend/src/utils/dataSourceCapabilities.test.ts b/frontend/src/utils/dataSourceCapabilities.test.ts
index adea747..0dcee63 100644
--- a/frontend/src/utils/dataSourceCapabilities.test.ts
+++ b/frontend/src/utils/dataSourceCapabilities.test.ts
@@ -76,4 +76,28 @@ describe('dataSourceCapabilities', () => {
       supportsApproximateTableCount: true,
     });
   });
+
+  it('hides database-level DDL actions for Dameng and Oracle-like datasources', () => {
+    expect(getDataSourceCapabilities({ type: 'dameng' })).toMatchObject({
+      type: 'dameng',
+      supportsCreateDatabase: false,
+      supportsRenameDatabase: false,
+      supportsDropDatabase: false,
+    });
+    expect(getDataSourceCapabilities({ type: 'oracle' })).toMatchObject({
+      type: 'oracle',
+      supportsCreateDatabase: false,
+      supportsRenameDatabase: false,
+      supportsDropDatabase: false,
+    });
+    expect(getDataSourceCapabilities({
+      type: 'oceanbase',
+      oceanBaseProtocol: 'oracle',
+    })).toMatchObject({
+      type: 'oracle',
+      supportsCreateDatabase: false,
+      supportsRenameDatabase: false,
+      supportsDropDatabase: false,
+    });
+  });
 });
diff --git a/frontend/src/utils/dataSourceCapabilities.ts b/frontend/src/utils/dataSourceCapabilities.ts
index 5de93ba..a82a543 100644
--- a/frontend/src/utils/dataSourceCapabilities.ts
+++ b/frontend/src/utils/dataSourceCapabilities.ts
@@ -99,12 +99,55 @@ export type DataSourceCapabilities = {
   supportsQueryEditor: boolean;
   supportsSqlQueryExport: boolean;
   supportsCopyInsert: boolean;
+  supportsCreateDatabase: boolean;
+  supportsRenameDatabase: boolean;
+  supportsDropDatabase: boolean;
   forceReadOnlyQueryResult: boolean;
   preferManualTotalCount: boolean;
   supportsApproximateTableCount: boolean;
   supportsApproximateTotalPages: boolean;
 };
 
+const CREATE_DATABASE_TYPES = new Set([
+  'mysql',
+  'mariadb',
+  'oceanbase',
+  'diros',
+  'starrocks',
+  'postgres',
+  'kingbase',
+  'highgo',
+  'vastbase',
+  'opengauss',
+  'sqlserver',
+  'tdengine',
+  'clickhouse',
+]);
+
+const RENAME_DATABASE_TYPES = new Set([
+  'diros',
+  'postgres',
+  'kingbase',
+  'highgo',
+  'vastbase',
+  'opengauss',
+]);
+
+const DROP_DATABASE_TYPES = new Set([
+  'mysql',
+  'mariadb',
+  'oceanbase',
+  'diros',
+  'starrocks',
+  'postgres',
+  'kingbase',
+  'highgo',
+  'vastbase',
+  'opengauss',
+  'tdengine',
+  'clickhouse',
+]);
+
 export const getDataSourceCapabilities = (config: ConnectionLike): DataSourceCapabilities => {
   const type = resolveDataSourceType(config);
   return {
@@ -112,6 +155,9 @@ export const getDataSourceCapabilities = (config: ConnectionLike): DataSourceCap
     supportsQueryEditor: !QUERY_EDITOR_DISABLED_TYPES.has(type),
     supportsSqlQueryExport: SQL_QUERY_EXPORT_TYPES.has(type),
     supportsCopyInsert: COPY_INSERT_TYPES.has(type),
+    supportsCreateDatabase: CREATE_DATABASE_TYPES.has(type),
+    supportsRenameDatabase: RENAME_DATABASE_TYPES.has(type),
+    supportsDropDatabase: DROP_DATABASE_TYPES.has(type),
     forceReadOnlyQueryResult: FORCE_READ_ONLY_QUERY_TYPES.has(type),
     preferManualTotalCount: MANUAL_TOTAL_COUNT_TYPES.has(type),
     supportsApproximateTableCount: APPROXIMATE_TABLE_COUNT_TYPES.has(type),