SQL层次查询

Question

SELECT ppse.SUBORDINATE_POSITION_ID child_position_id
               ,ppse.PARENT_POSITION_ID manger_position_id
               ,b.person_id
FROM per_pos_structure_elements_v ppse
      ,APPS.xxkpc_hr_personnel_v2_mv  b
WHERE b.position_id(+) = ppse.SUBORDINATE_POSITION_ID

AND ppse.POS_STRUCTURE_VERSION_ID =64
AND ppse.PARENT_POSITION_ID=12493

此查询的输出：

12604   12493   400 
12605   12493   108 
13644   12493   37897   
12752   12493   18  
13643   12493       
13642   12493       
13641   12493       



SELECT ppse.SUBORDINATE_POSITION_ID child_position_id
               ,ppse.PARENT_POSITION_ID manger_position_id
               ,b.person_id
FROM per_pos_structure_elements_v ppse
              ,APPS.xxkpc_hr_personnel_v2_mv  b
WHERE b.position_id(+) = ppse.SUBORDINATE_POSITION_ID

AND ppse.POS_STRUCTURE_VERSION_ID =64
AND ppse.PARENT_POSITION_ID=12504


12514   12504   449
12483   12504   450
12487   12504   456
12497   12504   156
12889   12504   168
12493   12504   

12493在第一个查询中是父级，在第二个查询中是子级，因此我需要删除所有具有null person_id（Third Column）且不是子级的父级的行，如在第二个查询中一样，我不能删除最后一行，因为他是第一个查询的父级查询，但要删除第一个查询中的最后3行

Answer 1

试试这样的东西...

SELECT ppse.SUBORDINATE_POSITION_ID child_position_id
           ,ppse.PARENT_POSITION_ID manger_position_id
           ,b.person_id
FROM per_pos_structure_elements_v ppse
  ,APPS.xxkpc_hr_personnel_v2_mv  b
WHERE b.position_id(+) = ppse.SUBORDINATE_POSITION_ID
AND b.type(+) = 'KPC Employee'
AND ppse.POS_STRUCTURE_VERSION_ID =64
AND ppse.PARENT_POSITION_ID=12493
AND 
(b.person_id!=null OR 
 ppse.SUBORDINATE_POSITION_ID in
             (SELECT SUBORDINATE_POSITION_ID from per_pos_structure_elements_v))