SQL Oracle人力資源管理

Question

select ppf.employee_number , ABA.absence_days 
from  PER_ABSENCE_ATTENDANCES ABA, apps.PER_ALL_PEOPLE_F ppf 
where ppf.person_id = aba.person_id 

我需要得到所有員工人數和無天他們的經理下下（表parent_position_id & subordinate_position_idper_pos_structure_elements）

e.g parent_position_id = 12541

我怎樣才能將它們集成？

Answer 1

像這樣的東西？

select ppf.employee_number , ABA.absence_days 
from  PER_ABSENCE_ATTENDANCES ABA 
inner join apps.PER_ALL_PEOPLE_F ppf 
    on ppf.person_id = ABA.person_id 
inner join per_pos_structure_elements 
    on ppf.subordinate_position_id = ppf.person_id 
where ppf.parent_position_id = 12541 

Answer 2

SELECT employee_number, NVL(a.absence_days,0) 
FROM (SELECT ppf.employee_number employee_number , ABA.absence_days absence_days 
     FROM apps.PER_ALL_PEOPLE_F ppf 
     LEFT OUTER JOIN PER_ABSENCE_ATTENDANCES ABA ON ppf.person_id = ABA.person_id 
    ) a 
INNER JOIN per_pos_structure_elements pps 
    ON pps.subordinate_position_id = ppf.person_id AND ppf.parent_position_id = 12541