---
sourceDocument: Australia Platform security
sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/de-DE/platform-security

 Release :

    - australia

ft:locale :

    - de-DE

ft:publication_title :

    - Australia Platform security

ft:clusterId :

    - psec

bundleId :

    - psec

workflow :

    - Platform


---

# Add a domain field to a table

# Add a domain field to a table {#ariaid-title1}

* Freigeben Version: Australia
* 
* Aktualisiert 12. März 2026
* 
* ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 Minute Lesedauer

As an administrator, domain-separate a custom table by adding a sys_domain field to it.

## Vorbereitungen

Role required: admin

## Warum und wann dieser Vorgang ausgeführt wird

Hinweis:  
Do not add domains to base system tables.

## Prozedur

1. Navigate to the table's list view.  
   For example, type \<table name\><kbd class="ph userinput">.list</kbd> in the navigation filter.
2. Right-click the list header and select ConfigureList Layout.
3. In the Create new field section, enter <kbd class="ph userinput">sys_domain</kbd> as the Name and <kbd class="ph userinput">Domain ID</kbd> as the Type.
4. Click Add.
5. Click Save.  
   Hinweis:  
   Any other means of creating a field adds a u_
   prefix to the column name. But with the domain field, the system
   automatically creates the field without the u_
   prefix. You can use the following functionality as a shortcut: Whenever
   you create a sys_domain field, name it
   sys_domain and leave the field type as is.
   The system automatically sets the field type to Domain ID and the field label to Domain,
   saving you a few clicks.

   Adding domains to base system tables requires prohibitively thorough
   testing, updates and adding new logic. In addition in many cases, the
   source code is not accessible to the customer.