# UPDATE


Updates rows in an Apache Iceberg table. `UPDATE` is transactional and is supported only for Apache Iceberg tables. The statement works only on existing rows and cannot be used to insert or append a row.

## Synopsis


To update the rows in an Iceberg table, use the following syntax.

```
UPDATE [db_name.]table_name SET xx=yy[,...] [WHERE predicate]
```

For more information and examples, see the `UPDATE` section of [Update Iceberg table data](querying-iceberg-updating-iceberg-table-data.md).