RunUpdate method Null safety

Future<String> RunUpdate(
  1. String sql
)

传入sql语句并单独执行这一条修改语句 成功：修改成功 失败：修改失败 打印报错

Implementation

Future<String> RunUpdate(String sql) async {
  try {
    var databasePath = await getDatabasesPath();
    String path = join(databasePath, DBPath);
    Database database = await openDatabase(path);
    int result = await database.rawUpdate(sql);
    await database.close();
    return "修改成功";
  } catch (e) {
    print(e.toString());
    return "修改失败";
  }
}