System Fields

The following fields are read-only fields found on most objects. These fields are automatically updated during API operations. For example, the ID field is automatically generated during a create operation and the LastModifiedDate is automatically updated during any operation on an object.

Field Field Type Description
Id ID Globally unique string that identifies a record. For information on IDs, see ID Field Type. Because this field exists in every object, it is not listed in the field table for each object. Id fields have Defaulted on create and Filter access.
IsDeleted boolean Indicates whether the record has been moved to the Recycle Bin (true) or not (false). Because this field does not appear in all objects, it is listed in the field table for each object.
Audit Fields
CreatedById reference ID of the User who created this record. CreatedById fields have Defaulted on create and Filter access.
CreatedDate dateTime Date and time when this record was created. CreatedDate fields have Defaulted on create and Filter access.
LastModifiedById reference ID of the User who last updated this record. LastModifiedById fields have Defaulted on create and Filter access.
LastModifiedDate dateTime Date and time when this record was last modified by a user. LastModifiedDate fields have Defaulted on create and Filter access.
SystemModstamp dateTime Date and time when this record was last modified by a user or by an automated process (such as a trigger). SystemModstamp fields have Defaulted on create and Filter access.

If you import data into Salesforce and need to set the value for an audit field, contact Salesforce. Once Salesforce enables this capability for your organization, you can set audit field values for the following objects: Account, CampaignMember, Case, CaseComment, Contact, FeedComment, FeedItem, Idea, IdeaComment, Lead, Opportunity, and Vote. The only audit field you cannot set a value for is systemModstamp.

For information on setting audit fields for custom objects, see Audit Fields for Custom Objects.

Not all standard objects have all audit fields. Check the Enterprise WSDL to verify which audit fields are available for a given object.

Parent Reference Fields

If an object has a relationship to a parent object, two fields are added:

  • Parent_Name contains the object name of the parent. For example, Case has a Contact field that contains a reference to the contact parent of the case.
  • Parent_NameId contains the ID of the parent. For example, Case has a ContactId field that refers to the contact parent of the case. This field is used in SOQL relationship queries such as the following:
    SELECT Case.ContactId, Case.Contact.Name FROM Case

Even if the object can parent itself, these fields occur. For example, the Campaign object has a Campaign and CampaignId field for referencing the parent Campaign.

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