当oracle clob类型不能和group by并用，但是需要去除多列重复

当oracle clob类型不能和groupby并用，但是需要去除多列重复，请不要急！

直接看SQL：

SELECT T.MEMBER,
T.HTEST,
T.ACCEPTDATE,
T.TASKMEMO,
T.ACCEPTER,
T.TASKID,
T.ACCEPTRESULT,
T.OVERHAULRESULT,
T.OVERHAULCONTENT,
T.EQUIPMENTID ,
T.TASKLEVEL,
T.LEADER,
T.TASKNAME,
T.BEGINDATE,
T.ENDDATE,
T.PIOCONTENT,
V.GUOLUNAME,V.FENLEINAME
FROM V_GL_6JI V,T_OVERHUALTASK_TASK T
WHERE T.EQUIPMENTID=V.FENLEIID  AND T.TASKID = 10000039104 GROUP BY  T.MEMBER,T.HTEST,
T.ACCEPTDATE,
T.TASKMEMO,        T.ACCEPTER,
T.TASKID,        T.ACCEPTRESULT,
T.OVERHAULRESULT,        T.OVERHAULCONTENT,
T.EQUIPMENTID ,        T.TASKLEVEL,
T.LEADER,        T.TASKNAME, T.BEGINDATE, T.ENDDATE,
T.PIOCONTENT,
V.GUOLUNAME,V.FENLEINAME

但是会报如下错

ORA-00932: 数据类型不一致: 应为 -, 但却获得 CLOB

00932. 00000 - "inconsistent datatypes: expected %s got%s"

*Cause:

*Action:

行 19 列 89 出错

解决办法，不用group by

Sql如下:

SELECT T.MEMBER,
T.HTEST,
T.ACCEPTDATE,
T.TASKMEMO,
T.ACCEPTER,
T.TASKID,
T.ACCEPTRESULT,
T.OVERHAULRESULT,
T.OVERHAULCONTENT,
T.EQUIPMENTID ,
T.TASKLEVEL,
T.LEADER,
T.TASKNAME,
T.BEGINDATE,
T.ENDDATE,
T.PIOCONTENT,
(select v.FENLEINAME fromV_GL_6JI v where v.FENLEIID= T.EQUIPMENTID group by v.FENLEINAME) asFENLEINAME,
(select v.GUOLUNAME fromV_GL_6JI v where v.FENLEIID= T.EQUIPMENTID group by v.GUOLUNAME) as GUOLUNAME
FROM T_OVERHUALTASK_TASK T
WHERE   T.TASKID = 10000039104

办法虽然有点笨，但是可以解决问题