[模型定义](%E6%A8%A1%E5%9E%8B%E5%AE%9A%E4%B9%89.md) [添加数据](%E6%A8%A1%E5%9E%8B-%E6%B7%BB%E5%8A%A0%E6%95%B0%E6%8D%AE.md) [更新数据](%E6%A8%A1%E5%9E%8B-%E6%9B%B4%E6%96%B0%E6%95%B0%E6%8D%AE.md) [查询数据](%E6%A8%A1%E5%9E%8B-%E6%9F%A5%E8%AF%A2%E6%95%B0%E6%8D%AE.md) [删除数据](%E6%A8%A1%E5%9E%8B-%E5%88%A0%E9%99%A4%E6%95%B0%E6%8D%AE.md)