create table ORDER_EVENT_DETAIL 
( 
  order_event_detail_uid         NUMBER(38) not null, 
  dist_ext_order_dtl_uid         NUMBER(38), 
  status                         VARCHAR2(50), 
  trans_uid                      NUMBER(38), 
  dist_units                     NUMBER(32,16), 
  dist_units_nic                 NUMBER(32,16), 
  forfeited_units                NUMBER(32,16), 
  settlement_price               NUMBER(32,16) 
  )

INSERT INTO ORDER_EVENT_DETAIL 
  (ORDER_EVENT_DETAIL_UID 
  ,DIST_EXT_ORDER_DTL_UID 
  ,STATUS 
  ,TRANS_UID 
  ,DIST_UNITS 
  ,DIST_UNITS_NIC 
  ,FORFEITED_UNITS 
  ,SETTLEMENT_PRICE) 
VALUES 
  (1245 
  ,1245 
  ,'OPEN' 
  ,45896 
  ,4637.4120000000000000 
  ,37.4120000000000000 
  ,0.0000000000000000 
  ,1.0000000000000000)

select * from  ORDER_EVENT_DETAIL 

UPDATE ORDER_EVENT_DETAIL oed 
   SET oed.dist_units     = 4637.4120000000001234 
      ,oed.dist_units_nic = 37.4120000000000847 
 WHERE oed.order_event_detail_uid = 1245

select * from  ORDER_EVENT_DETAIL