> For the complete documentation index, see [llms.txt](https://next-docs.cloudio.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://next-docs.cloudio.io/datasource/who-columns.md).

# WHO Columns

Make sure the following WHO columns exists on all the tables that are updated via. the platform UI

```sql
  `CREATION_DATE` datetime(6) NOT NULL,
  `CREATED_BY` varchar(128) NOT NULL,
  `LAST_UPDATE_DATE` datetime(6) NOT NULL,
  `LAST_UPDATED_BY` varchar(128) NOT NULL,
```

{% hint style="warning" %}
Note: The date column LAST\_UPDATE\_DATE must be of type **datetime(6)**
{% endhint %}