--- unlock 

This command unlocks data base fields that have been protected
   by Field Level Security.  To unlock a field for reading, you simply
   specify the read password.  To unlock a field for writing (as well 
   as reading), you must supply the optional keyword `write' after the
   write password.  The command must be terminated with a slash.

The form of the command is

                unlock record.field, password [write] 
                        [, record.field, password [write]]  ... /

EXAMPLES:

       sql> unlock emp.salary, kitten /
       (unlocks emp.salary for reading)
      
       sql> unlock emp.commission, sunshine write,
                     emp.bonus, xyzzy /
       (unlocks emp.commission for writing, emp.bonus for reading)
