---
sourceDocument: Australia ServiceNow AI Platform Administration
sourceDocumentLink: https://www.servicenow.com/docs/r/platform-administration

 Release :

    - australia

ft:locale :

    - en-US

ft:publication_title :

    - Australia ServiceNow AI Platform Administration

ft:clusterId :

    - platadm

bundleId :

    - platadm

workflow :

    - Platform


---

# Global default fields

# Global default fields {#ariaid-title1}

* Release version: Australia
* 
* Updated March 12, 2026
* 
* ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read

When you create a new custom table, several fields appear in the Table Columns embedded list. For all tables, required system fields are added
automatically. You cannot delete or modify these fields.
For tables that extend another table, fields on the parent table also appear on the
Table Columns embedded list for the current table. If you modify
these fields, remember that all changes to fields on the parent table also affect all child
tables, not just the current table.  
These required system fields are added to all tables:{#r_GlobalDefaultFields__table_dmt_45v_tr__entry__3}

| Field | Type | Description |
|-|-|-|
| Class \[sys_class_name\] | System Class Name | If the table is extensible, a string field that indicates which child table contains the record. |
| Created \[sys_created_on\] | Date/Time | A time-stamp field that indicates when a record was created. |
| Created by \[sys_created_by\] | String | A string field that indicates the user who created the record. |
| Sys_id \[sys_id\] | Sys ID | The [Unique record identifier (sys_id)](https://www.servicenow.com/docs/8KbwptwrdfUtk1cr2_TpVg#c_UniqueRecordIdentifier "A unique 32-character GUID (Globally Unique ID), called a Sys ID (sys_id) identifies each record in an instance.") for the record. |
| Updates \[sys_mod_count\] | Integer | A numeric field that counts the number of updates for this record since record creation. |
| Updated by \[sys_updated_by\] | String | A string field that indicates the user who most recently updated the record. |
| Updated \[sys_updated_on\] | Date/Time | A time-stamp field that indicates the date and time of the most recent update. |
[Table 1. Required system fields]

{#r_GlobalDefaultFields__table_dmt_45v_tr}