CREATE OR REPLACE VIEW V_LACO AS
SELECT enty_code
      ,mety_code
      ,svcpt_code
      ,mesc_code
      ,selling_price
      ,cost_price
      ,delivery_cost
      ,regi_code
      ,valid_from AS effective_from
      ,least(nvl(valid_to
                ,to_date('2099'
                        ,'yyyy'))
            ,nvl(next_valid_from
                ,to_date('2099'
                        ,'yyyy'))) AS effective_to
  FROM (SELECT enty_code
              ,mety_code
              ,svcpt_code
              ,mesc_code
              ,selling_price
              ,cost_price
              ,delivery_cost
              ,regi_code
              ,valid_from
              ,valid_to
              ,lead(valid_from) over(PARTITION BY enty_code, mety_code, svcpt_code, mesc_code, regi_code ORDER BY valid_from) AS next_valid_from
          FROM costs cost
         WHERE cost_type = 'LACO');