select E.EXPERT_ID_, E.COM_NAME_, E.EMP_NAME_, E.STATUS_, ER.PARENT_PRO_CODE_, wm_concat(ER.PRO_CODE_) as PRO_CODE_ from MP_EXPERT E left outer join MP_EXPERT_RELATION ER on ER.EXPERT_ID_ = E.EXPERT_ID_ group by E.EXPERT_ID_, E.COM_NAME_, E.EMP_NAME_, E.STATUS_, ER.PARENT_PRO_CODE_ having ER.PARENT_PRO_CODE_='动力';
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转换后：
wm_concat(列名),该函数可以把列值以","号分隔起来