PRIORVALUE

Use

PRIORVALUE(field)

Tips

• This function is available only in:
  • Assignment rules
  • Validation rules
  • Field updates
  • Workflow rules if the evaluation criteria is set to Evaluate the rule when a record is: created, and every time it’s edited .
  • Formula criteria for executing actions and setting input values in Process Builder.
• This function doesn’t return default values.
• When users create a record, this function returns the value of the field referenced rather than null. For example, if you create an account named "Acme," PRIORVALUE(Account.Name) returns Acme.
• When using the ISPICKVAL function to return the previous value of a picklist field, include the PRIORVALUE function inside the ISPICKVAL function as in this example:

  ISPICKVAL(PRIORVALUE
  (picklist_field), 
  text_literal)

• To check if the previous value of a multi-select picklist field includes a specific value, use the PRIORVALUE function inside the INCLUDES function. For example:

  INCLUDES(
     PRIORVALUE(multiselect_picklist_field),
  text_literal
  )