Salesforce API Field Types

Fields on objects represent the details of each object and are analogous to columns in a database table. Each field on each object has one or more of the following properties:

Property	Description
Aggregatable	Can be used by one of the SOQL aggregate functions.
Autonumber	The API creates an autonumber.
Create	Value for the field can be specified during create using the API.
Defaulted on create	If no other value is specified when created, a default value is supplied.
Delete	Value for the field can be deleted using the API.
Filter	Can be used as filter criteria in a SOQL query FROM or WHERE clause.
Group	Can be included in the GROUP BY clause of a SOQL query (true) or not (false). Available in API version 18.0 and later.
idLookup	Can be used to specify a record in an upsert call. The Id field of each object has this property and some Name fields. There are exceptions, so check for the property in any object you wish to upsert.
Namepointing	Indicates whether the field’s value is the Name of the parent of this object (true) or not (false). Used for objects whose parents can be more than one type of object. For example, a task can have an account or a contact as a parent.
Nillable	The field can contain a null value.
Query	The field can be queried with SOQL using the API.
Restricted picklist	A picklist whose values are restricted to those values defined by a Salesforce admin. Users can’t load unapproved values through the API.
Retrieve	Value of the field can be retrieved using the API.
Sort	Indicates whether a query can sort on this field (true) or not (false).
Update	Can be updated using the API.