<pre name="code" class="html">

在utf8資料庫裡編譯儲存過程，遇到這個問題.
oracle9206
sql: [做了簡化]
select a from t1
union all
select '1' from t2;
其中t1.a是nvarchar2型別。

解決辦法很簡單:
select a from t1
union all
select N'1' from t2;

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select em.devicename,
       to_char(em.faulttime, 'yyyy-mm-dd hh24:mi:ss') faulttime,
       et.enumname maintainstatus,
       (case
         when (em.DPLANREPAIRTIME >= em.drealrepairtime) or
              (sysdate < em.dplanrepairtime) then
          '及時'
         when (em.dplanrepairtime < em.drealrepairtime) or
              (em.drealrepairtime is null and em.dplanrepairtime < sysdate) then
          '不及時'
         when (em.dplanrepairtime is null and em.drealrepairtime is null and
              (em.faulttime + esl.finishtime / 24) > sysdate) then
          '及時'
         when (em.dplanrepairtime is null and em.drealrepairtime is null and
              (em.faulttime + esl.finishtime / 24) < sysdate) then
          '不及時'
       end) overdue,
       et1.enumname faultfrom,
       em.CBUGDETAIL,
       to_char((select wm_concat(to_char(eti.track_time,
                                        'yyyy-mm-dd hh24:mi:ss') || ' ' ||
                                eti.track_info || '【' || eti.track_man || '】')
                 from equip_maintain_tracking_info eti
                where eti.maintain_id = em.maintainid)) genjin,
       et2.enumname resultstatus, to_char(em.drealrepairtime, 'yyyy-mm-dd hh24:mi:ss') nworkhour,
       (case
         when sps.connection_name is null then
          ''
         else
          sps.connection_name || '-' || sps.connection_phone
       end) crepairid,
       et3.enumname faulttype
  from equip_maintain em
  left join enum_type et
    on et.enumvalue = em.maintain_status
   and et.enumtypeid = '75'
  left join enum_type et1
    on et1.enumvalue = em.fault_from
   and et1.enumtypeid = '74'
  left join enum_type et2
    on et2.enumvalue = em.result_status
   and et2.enumtypeid = '76'
  left join equip_service_level esl
    on esl.name = em.service_level
  left join Equip_Service_Provider_Sms sps
    on sps.id = em.crepairid
  left join enum_type et3
    on em.fault_type = et3.enumvalue
   and et3.enumtypeid = '77'
 where em.cequipid = '370200000000080004'
   and (em.result_status = 1 or em.result_status is null)
   and em.faulttime >= to_date('20151127', 'yyyymmdd')
   and em.faulttime <= to_date('20151226235959', 'yyyymmddhh24miss')
 order by em.faulttime desc