# ALTER TABLE UNSET TBLPROPERTIES
<a name="querying-iceberg-alter-table-unset-properties"></a>

从 Iceberg 表中删除现有属性。

## 摘要
<a name="querying-iceberg-alter-table-unset-properties-synopsis"></a>

```
ALTER TABLE [{{db_name}}.]{{table_name}} UNSET TBLPROPERTIES ('{{property_name}}' [ , ... ])
```

## 示例
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```
ALTER TABLE iceberg_table UNSET TBLPROPERTIES ('write_compression')
```

以下示例会从 Iceberg 表中移除 `write.data.path` 属性。

```
ALTER TABLE iceberg_table UNSET TBLPROPERTIES ('write.data.path')
```