# UPDATE
<a name="querying-iceberg-update"></a>

Athena Iceberg `UPDATE` writes Iceberg position delete files and newly updated rows as data files in the same transaction. `UPDATE` can be imagined as a combination of `INSERT INTO` and `DELETE`. `UPDATE` operations are charged by the amount of data scanned. For syntax, see [UPDATE](update-statement.md).

The following example updates the specified values in the table `iceberg_table`.

```
UPDATE iceberg_table SET category='c2' WHERE category='c1'
```