如何使用API将Flutter应用程序连接到本地sql server数据库？

import 'package:sqflite/sqflite.dart';
import 'package:path/path.dart';

Future<Database> createDatabase() async {
  String databasesPath = await getDatabasesPath();
  String dbPath = join(databasesPath, 'mydatabase.db');
  return await openDatabase(dbPath, version: 1, onCreate: _onCreate);
}

void _onCreate(Database db, int version) async {
  await db.execute('CREATE TABLE mytable (id INTEGER PRIMARY KEY, name TEXT)');
}

Future<void> insertData() async {
  Database database = await createDatabase();
  await database.insert('mytable', {'id': 1, 'name': 'John'});
}

Future<List<Map<String, dynamic>>> getData() async {
  Database database = await createDatabase();
  return await database.query('mytable');
}

Future<void> updateData() async {
  Database database = await createDatabase();
  await database.update('mytable', {'name': 'Updated Name'}, where: 'id = ?', whereArgs: [1]);
}

Future<void> deleteData() async {
  Database database = await createDatabase();
  await database.delete('mytable', where: 'id = ?', whereArgs: [1]);
}

FlatButton(
  onPressed: () async {
    await insertData();
    List<Map<String, dynamic>> data = await getData();
    print(data);
  },
  child: Text('Insert and Query'),
),