diff --git a/backend/.env.example b/backend/.env.example
index 2871f01..63f1ae2 100644
--- a/backend/.env.example
+++ b/backend/.env.example
@@ -15,4 +15,4 @@ JWT_EXPIRES_IN=24h
 
 # API Rate Limiting
 RATE_LIMIT_WINDOW_MS=900000
-RATE_LIMIT_MAX_REQUESTS=100
\ No newline at end of file
+RATE_LIMIT_MAX_REQUESTS=100
diff --git a/backend/src/controllers/sqlInterfaceController.ts b/backend/src/controllers/sqlInterfaceController.ts
new file mode 100644
index 0000000..ca80321
--- /dev/null
+++ b/backend/src/controllers/sqlInterfaceController.ts
@@ -0,0 +1,46 @@
+import { Request, Response } from 'express';
+import { databasePoolManager } from '../services/DatabasePoolManager';
+
+export const executeQuery = async (req: Request, res: Response) => {
+  try {
+    const { database_id, query } = req.body;
+
+    if (!database_id) {
+      return res.status(400).json({ error: 'Database ID is required' });
+    }
+
+    if (!query || typeof query !== 'string' || query.trim() === '') {
+      return res.status(400).json({ error: 'Query is required' });
+    }
+
+    const pool = databasePoolManager.getPool(database_id);
+    if (!pool) {
+      return res.status(404).json({ error: 'Database not found or not active' });
+    }
+
+    const startTime = Date.now();
+    const result = await pool.query(query);
+    const executionTime = Date.now() - startTime;
+
+    res.json({
+      success: true,
+      data: result.rows,
+      rowCount: result.rowCount,
+      fields: result.fields?.map(f => ({
+        name: f.name,
+        dataTypeID: f.dataTypeID,
+      })),
+      executionTime,
+      command: result.command,
+    });
+  } catch (error: any) {
+    console.error('SQL execution error:', error);
+    res.status(400).json({
+      success: false,
+      error: error.message || 'Query execution failed',
+      position: error.position,
+      detail: error.detail,
+      hint: error.hint,
+    });
+  }
+};
diff --git a/backend/src/routes/sqlInterface.ts b/backend/src/routes/sqlInterface.ts
new file mode 100644
index 0000000..e0a0195
--- /dev/null
+++ b/backend/src/routes/sqlInterface.ts
@@ -0,0 +1,11 @@
+import express from 'express';
+import { authMiddleware } from '../middleware/auth';
+import { executeQuery } from '../controllers/sqlInterfaceController';
+
+const router = express.Router();
+
+router.use(authMiddleware);
+
+router.post('/execute', executeQuery);
+
+export default router;
diff --git a/backend/src/server.ts b/backend/src/server.ts
index f68996f..61f71f9 100644
--- a/backend/src/server.ts
+++ b/backend/src/server.ts
@@ -18,6 +18,7 @@ import databaseRoutes from './routes/databases';
 import databaseManagementRoutes from './routes/databaseManagement';
 import userRoutes from './routes/users';
 import logsRoutes from './routes/logs';
+import sqlInterfaceRoutes from './routes/sqlInterface';
 import dynamicRoutes from './routes/dynamic';
 
 const app: Express = express();
@@ -87,6 +88,7 @@ app.use('/api/databases', databaseRoutes);
 app.use('/api/db-management', databaseManagementRoutes);
 app.use('/api/users', userRoutes);
 app.use('/api/logs', logsRoutes);
+app.use('/api/sql', sqlInterfaceRoutes);
 
 // Dynamic API routes (user-created endpoints)
 app.use('/api/v1', dynamicRoutes);
diff --git a/docker-compose.external-db.yml b/docker-compose.external-db.yml
index d392b0f..f503650 100644
--- a/docker-compose.external-db.yml
+++ b/docker-compose.external-db.yml
@@ -15,6 +15,8 @@ services:
       dockerfile: Dockerfile
     container_name: kis-api-builder-app
     restart: unless-stopped
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
     ports:
       - "${APP_PORT:-3000}:3000"
     environment:
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index be7dab1..70db25f 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -13,6 +13,7 @@ import ApiKeys from '@/pages/ApiKeys';
 import Folders from '@/pages/Folders';
 import Logs from '@/pages/Logs';
 import Settings from '@/pages/Settings';
+import SqlInterface from '@/pages/SqlInterface';
 
 const queryClient = new QueryClient({
   defaultOptions: {
@@ -75,6 +76,16 @@ function App() {
               </PrivateRoute>
             }
           />
+          <Route
+            path="/sql"
+            element={
+              <PrivateRoute>
+                <Layout>
+                  <SqlInterface />
+                </Layout>
+              </PrivateRoute>
+            }
+          />
           <Route
             path="/endpoints"
             element={
diff --git a/frontend/src/components/Sidebar.tsx b/frontend/src/components/Sidebar.tsx
index 2cb9dcc..c03d5f1 100644
--- a/frontend/src/components/Sidebar.tsx
+++ b/frontend/src/components/Sidebar.tsx
@@ -1,9 +1,10 @@
 import { NavLink } from 'react-router-dom';
-import { Book, Home, Key, Folder, Settings, FileCode, FileText, ExternalLink } from 'lucide-react';
+import { Book, Home, Key, Folder, Settings, FileCode, FileText, ExternalLink, Database } from 'lucide-react';
 import { cn } from '@/utils/cn';
 
 const navItems = [
   { to: '/', icon: Home, label: 'Главная' },
+  { to: '/sql', icon: Database, label: 'SQL интерфейс' },
   { to: '/endpoints', icon: FileCode, label: 'Эндпоинты' },
   { to: '/folders', icon: Folder, label: 'Папки' },
   { to: '/api-keys', icon: Key, label: 'API Ключи' },
diff --git a/frontend/src/pages/SqlInterface.tsx b/frontend/src/pages/SqlInterface.tsx
new file mode 100644
index 0000000..77a75c7
--- /dev/null
+++ b/frontend/src/pages/SqlInterface.tsx
@@ -0,0 +1,432 @@
+import { useState, useEffect, useCallback } from 'react';
+import { useQuery } from '@tanstack/react-query';
+import { Play, Plus, X, Database as DatabaseIcon, Clock, CheckCircle, XCircle, Loader2 } from 'lucide-react';
+import { databasesApi, sqlInterfaceApi, SqlQueryResult } from '@/services/api';
+import { Database } from '@/types';
+import SqlEditor from '@/components/SqlEditor';
+
+interface SqlTab {
+  id: string;
+  name: string;
+  query: string;
+  databaseId: string;
+  result: SqlQueryResult | null;
+  isExecuting: boolean;
+}
+
+interface SqlInterfaceState {
+  tabs: SqlTab[];
+  activeTabId: string;
+}
+
+const STORAGE_KEY = 'sql_interface_state';
+
+const generateTabId = () => `tab_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
+
+const createNewTab = (databaseId: string = '', name?: string): SqlTab => ({
+  id: generateTabId(),
+  name: name || 'Новый запрос',
+  query: '',
+  databaseId,
+  result: null,
+  isExecuting: false,
+});
+
+const loadState = (): SqlInterfaceState | null => {
+  try {
+    const saved = localStorage.getItem(STORAGE_KEY);
+    if (saved) {
+      return JSON.parse(saved);
+    }
+  } catch (e) {
+    console.error('Failed to load SQL interface state:', e);
+  }
+  return null;
+};
+
+const saveState = (state: SqlInterfaceState) => {
+  try {
+    // Don't save isExecuting state and large results
+    const stateToSave = {
+      ...state,
+      tabs: state.tabs.map(tab => ({
+        ...tab,
+        isExecuting: false,
+        result: tab.result ? {
+          ...tab.result,
+          data: tab.result.data?.slice(0, 100), // Limit saved results
+        } : null,
+      })),
+    };
+    localStorage.setItem(STORAGE_KEY, JSON.stringify(stateToSave));
+  } catch (e) {
+    console.error('Failed to save SQL interface state:', e);
+  }
+};
+
+export default function SqlInterface() {
+  const { data: databases = [], isLoading: isLoadingDatabases } = useQuery({
+    queryKey: ['databases'],
+    queryFn: async () => {
+      const { data } = await databasesApi.getAll();
+      // Filter only SQL databases (not AQL)
+      return data.filter((db: Database) => db.type !== 'aql');
+    },
+  });
+
+  const [state, setState] = useState<SqlInterfaceState>(() => {
+    const saved = loadState();
+    if (saved && saved.tabs.length > 0) {
+      return saved;
+    }
+    const initialTab = createNewTab();
+    return {
+      tabs: [initialTab],
+      activeTabId: initialTab.id,
+    };
+  });
+
+  // Save state to localStorage on changes
+  useEffect(() => {
+    saveState(state);
+  }, [state]);
+
+  // Set default database for new tabs when databases load
+  useEffect(() => {
+    if (databases.length > 0) {
+      setState(prev => ({
+        ...prev,
+        tabs: prev.tabs.map(tab =>
+          tab.databaseId === '' ? { ...tab, databaseId: databases[0].id } : tab
+        ),
+      }));
+    }
+  }, [databases]);
+
+  const activeTab = state.tabs.find(t => t.id === state.activeTabId) || state.tabs[0];
+
+  const updateTab = useCallback((tabId: string, updates: Partial<SqlTab>) => {
+    setState(prev => ({
+      ...prev,
+      tabs: prev.tabs.map(tab =>
+        tab.id === tabId ? { ...tab, ...updates } : tab
+      ),
+    }));
+  }, []);
+
+  const addTab = useCallback(() => {
+    const defaultDbId = databases.length > 0 ? databases[0].id : '';
+    const newTab = createNewTab(defaultDbId, `Запрос ${state.tabs.length + 1}`);
+    setState(prev => ({
+      tabs: [...prev.tabs, newTab],
+      activeTabId: newTab.id,
+    }));
+  }, [databases, state.tabs.length]);
+
+  const closeTab = useCallback((tabId: string, e: React.MouseEvent) => {
+    e.stopPropagation();
+    setState(prev => {
+      if (prev.tabs.length === 1) {
+        // Don't close the last tab, just reset it
+        const defaultDbId = databases.length > 0 ? databases[0].id : '';
+        const newTab = createNewTab(defaultDbId);
+        return {
+          tabs: [newTab],
+          activeTabId: newTab.id,
+        };
+      }
+
+      const newTabs = prev.tabs.filter(t => t.id !== tabId);
+      const newActiveId = prev.activeTabId === tabId
+        ? newTabs[Math.max(0, prev.tabs.findIndex(t => t.id === tabId) - 1)].id
+        : prev.activeTabId;
+
+      return {
+        tabs: newTabs,
+        activeTabId: newActiveId,
+      };
+    });
+  }, [databases]);
+
+  const setActiveTab = useCallback((tabId: string) => {
+    setState(prev => ({ ...prev, activeTabId: tabId }));
+  }, []);
+
+  const executeQuery = useCallback(async () => {
+    if (!activeTab || !activeTab.databaseId || !activeTab.query.trim()) {
+      return;
+    }
+
+    updateTab(activeTab.id, { isExecuting: true, result: null });
+
+    try {
+      const { data } = await sqlInterfaceApi.execute(activeTab.databaseId, activeTab.query);
+      updateTab(activeTab.id, { isExecuting: false, result: data });
+    } catch (error: any) {
+      updateTab(activeTab.id, {
+        isExecuting: false,
+        result: {
+          success: false,
+          error: error.response?.data?.error || error.message || 'Query execution failed',
+          detail: error.response?.data?.detail,
+          hint: error.response?.data?.hint,
+        },
+      });
+    }
+  }, [activeTab, updateTab]);
+
+  // Keyboard shortcut for execute (Ctrl+Enter or Cmd+Enter)
+  useEffect(() => {
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if ((e.ctrlKey || e.metaKey) && e.key === 'Enter') {
+        e.preventDefault();
+        executeQuery();
+      }
+    };
+
+    window.addEventListener('keydown', handleKeyDown);
+    return () => window.removeEventListener('keydown', handleKeyDown);
+  }, [executeQuery]);
+
+  const selectedDatabase = databases.find((db: Database) => db.id === activeTab?.databaseId);
+
+  if (isLoadingDatabases) {
+    return (
+      <div className="flex items-center justify-center h-64">
+        <Loader2 className="animate-spin text-primary-600" size={32} />
+      </div>
+    );
+  }
+
+  return (
+    <div className="flex flex-col -m-8 bg-white" style={{ height: 'calc(100vh - 64px)' }}>
+      {/* Tabs bar */}
+      <div className="flex items-center bg-gray-100 border-b border-gray-200 px-2">
+        <div className="flex-1 flex items-center overflow-x-auto">
+          {state.tabs.map(tab => (
+            <button
+              key={tab.id}
+              onClick={() => setActiveTab(tab.id)}
+              className={`
+                flex items-center gap-2 px-4 py-2 text-sm border-r border-gray-200
+                ${tab.id === state.activeTabId
+                  ? 'bg-white text-gray-900 font-medium'
+                  : 'text-gray-600 hover:bg-gray-50'
+                }
+              `}
+            >
+              <span className="max-w-32 truncate">{tab.name}</span>
+              {tab.isExecuting && <Loader2 className="animate-spin" size={14} />}
+              <button
+                onClick={(e) => closeTab(tab.id, e)}
+                className="ml-1 p-0.5 rounded hover:bg-gray-200 text-gray-400 hover:text-gray-600"
+              >
+                <X size={14} />
+              </button>
+            </button>
+          ))}
+        </div>
+        <button
+          onClick={addTab}
+          className="p-2 text-gray-500 hover:text-gray-700 hover:bg-gray-200 rounded"
+          title="Новая вкладка"
+        >
+          <Plus size={18} />
+        </button>
+      </div>
+
+      {/* Toolbar */}
+      <div className="flex items-center gap-4 p-3 border-b border-gray-200 bg-gray-50">
+        {/* Database selector */}
+        <div className="flex items-center gap-2">
+          <DatabaseIcon size={18} className="text-gray-500" />
+          <select
+            value={activeTab?.databaseId || ''}
+            onChange={(e) => updateTab(activeTab.id, { databaseId: e.target.value })}
+            className="border border-gray-300 rounded-md px-3 py-1.5 text-sm bg-white focus:outline-none focus:ring-2 focus:ring-primary-500 min-w-48"
+          >
+            <option value="">Выберите базу данных</option>
+            {databases.map((db: Database) => (
+              <option key={db.id} value={db.id}>
+                {db.name} ({db.type})
+              </option>
+            ))}
+          </select>
+        </div>
+
+        {/* Execute button */}
+        <button
+          onClick={executeQuery}
+          disabled={!activeTab?.databaseId || !activeTab?.query.trim() || activeTab?.isExecuting}
+          className="flex items-center gap-2 px-4 py-1.5 bg-green-600 text-white rounded-md hover:bg-green-700 disabled:opacity-50 disabled:cursor-not-allowed text-sm font-medium"
+        >
+          {activeTab?.isExecuting ? (
+            <Loader2 className="animate-spin" size={16} />
+          ) : (
+            <Play size={16} />
+          )}
+          Выполнить
+          <span className="text-xs opacity-75 ml-1">(Ctrl+Enter)</span>
+        </button>
+
+        {/* Tab name editor */}
+        <input
+          type="text"
+          value={activeTab?.name || ''}
+          onChange={(e) => updateTab(activeTab.id, { name: e.target.value })}
+          className="border border-gray-300 rounded-md px-3 py-1.5 text-sm bg-white focus:outline-none focus:ring-2 focus:ring-primary-500 w-48"
+          placeholder="Название вкладки"
+        />
+      </div>
+
+      {/* Main content area */}
+      <div className="flex-1 flex flex-col min-h-0">
+        {/* SQL Editor */}
+        <div className="h-1/2 min-h-48 border-b border-gray-200">
+          <SqlEditor
+            value={activeTab?.query || ''}
+            onChange={(value) => updateTab(activeTab.id, { query: value })}
+            databaseId={activeTab?.databaseId}
+            height="100%"
+          />
+        </div>
+
+        {/* Results panel */}
+        <div className="flex-1 min-h-0 flex flex-col bg-white">
+          {/* Result header */}
+          {activeTab?.result && (
+            <div className="flex items-center gap-4 px-4 py-2 bg-gray-50 border-b border-gray-200 text-sm">
+              {activeTab.result.success ? (
+                <>
+                  <div className="flex items-center gap-1 text-green-600">
+                    <CheckCircle size={16} />
+                    <span>Успешно</span>
+                  </div>
+                  <div className="flex items-center gap-1 text-gray-600">
+                    <span>{activeTab.result.rowCount ?? 0} строк</span>
+                  </div>
+                  {activeTab.result.executionTime !== undefined && (
+                    <div className="flex items-center gap-1 text-gray-500">
+                      <Clock size={14} />
+                      <span>{activeTab.result.executionTime} мс</span>
+                    </div>
+                  )}
+                  {activeTab.result.command && (
+                    <span className="text-gray-400">{activeTab.result.command}</span>
+                  )}
+                </>
+              ) : (
+                <div className="flex items-center gap-1 text-red-600">
+                  <XCircle size={16} />
+                  <span>Ошибка</span>
+                </div>
+              )}
+            </div>
+          )}
+
+          {/* Result content */}
+          <div className="flex-1 overflow-auto">
+            {!activeTab?.result && !activeTab?.isExecuting && (
+              <div className="flex items-center justify-center h-full text-gray-400">
+                Выполните запрос, чтобы увидеть результаты
+              </div>
+            )}
+
+            {activeTab?.isExecuting && (
+              <div className="flex items-center justify-center h-full">
+                <Loader2 className="animate-spin text-primary-600" size={32} />
+              </div>
+            )}
+
+            {activeTab?.result && !activeTab.result.success && (
+              <div className="p-4">
+                <div className="bg-red-50 border border-red-200 rounded-lg p-4">
+                  <p className="text-red-700 font-medium">{activeTab.result.error}</p>
+                  {activeTab.result.detail && (
+                    <p className="text-red-600 mt-2 text-sm">{activeTab.result.detail}</p>
+                  )}
+                  {activeTab.result.hint && (
+                    <p className="text-red-500 mt-2 text-sm italic">Подсказка: {activeTab.result.hint}</p>
+                  )}
+                </div>
+              </div>
+            )}
+
+            {activeTab?.result?.success && activeTab.result.data && (
+              <ResultTable
+                data={activeTab.result.data}
+                fields={activeTab.result.fields || []}
+              />
+            )}
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+interface ResultTableProps {
+  data: any[];
+  fields: { name: string; dataTypeID: number }[];
+}
+
+function ResultTable({ data, fields }: ResultTableProps) {
+  if (data.length === 0) {
+    return (
+      <div className="flex items-center justify-center h-full text-gray-400">
+        Запрос выполнен успешно, но не вернул данных
+      </div>
+    );
+  }
+
+  const columns = fields.length > 0
+    ? fields.map(f => f.name)
+    : Object.keys(data[0] || {});
+
+  return (
+    <div className="overflow-auto h-full">
+      <table className="w-full text-sm">
+        <thead className="bg-gray-100 sticky top-0">
+          <tr>
+            <th className="px-3 py-2 text-left text-xs font-medium text-gray-500 border-r border-b border-gray-200 w-12">
+              #
+            </th>
+            {columns.map(col => (
+              <th
+                key={col}
+                className="px-3 py-2 text-left text-xs font-medium text-gray-600 border-r border-b border-gray-200 whitespace-nowrap"
+              >
+                {col}
+              </th>
+            ))}
+          </tr>
+        </thead>
+        <tbody>
+          {data.map((row, rowIndex) => (
+            <tr key={rowIndex} className="hover:bg-gray-50 border-b border-gray-100">
+              <td className="px-3 py-1.5 text-gray-400 border-r border-gray-100 text-xs">
+                {rowIndex + 1}
+              </td>
+              {columns.map(col => (
+                <td
+                  key={col}
+                  className="px-3 py-1.5 border-r border-gray-100 max-w-md truncate"
+                  title={formatCellValue(row[col])}
+                >
+                  {formatCellValue(row[col])}
+                </td>
+              ))}
+            </tr>
+          ))}
+        </tbody>
+      </table>
+    </div>
+  );
+}
+
+function formatCellValue(value: any): string {
+  if (value === null) return 'NULL';
+  if (value === undefined) return '';
+  if (typeof value === 'object') return JSON.stringify(value);
+  return String(value);
+}
diff --git a/frontend/src/services/api.ts b/frontend/src/services/api.ts
index b5f6588..39d131c 100644
--- a/frontend/src/services/api.ts
+++ b/frontend/src/services/api.ts
@@ -168,4 +168,23 @@ export const databasesApi = {
     api.get<{ schema: any[] }>(`/databases/${databaseId}/tables/${tableName}/schema`),
 };
 
+// SQL Interface API
+export interface SqlQueryResult {
+  success: boolean;
+  data?: any[];
+  rowCount?: number;
+  fields?: { name: string; dataTypeID: number }[];
+  executionTime?: number;
+  command?: string;
+  error?: string;
+  position?: number;
+  detail?: string;
+  hint?: string;
+}
+
+export const sqlInterfaceApi = {
+  execute: (databaseId: string, query: string) =>
+    api.post<SqlQueryResult>('/sql/execute', { database_id: databaseId, query }),
+};
+
 export default api;