[查询数据](%E6%9F%A5%E8%AF%A2%E6%95%B0%E6%8D%AE.md) [添加数据](%E6%B7%BB%E5%8A%A0%E6%95%B0%E6%8D%AE.md) [删除数据](%E5%88%A0%E9%99%A4%E6%95%B0%E6%8D%AE.md) [批量删除](%E6%89%B9%E9%87%8F%E5%88%A0%E9%99%A4.md)