oracle查詢列不能外部鏈接到子查詢

select t.*,fun_tr_user('1','id_name') user_name,d.dept_name from TBL_OA_PERFORMANCE_HIS_EXAM t left join tbl_base_dept d on d.dept_id in (select min(ud.dept_id) from TBL_BASE_USER_DEPT ud where ud.use

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