ORA-00904： "RN"：無効な識別子

Question

誰でもこのエラーが発生している理由を説明していただけますか、私は間違っています。

SELECT a.*, row_number() over (partition by code_employee order by 
to_date(substr(last_located_time,1,10),'yyyy-mm-dd')) rn 
FROM 
    (SELECT LAST_LOCATED_TIME, NAME_COMMON, CODE_EMPLOYEE 
FROM 
    daily_report 

WHERE INSERT_DATE = TRUNC (SYSDATE-3) AND DEVICE_NAME LIKE '%SM-T116IR')a 
WHERE rn=1; 

Answer 1

、このいずれかを試してください。

select * 
    from (select a.*, 
       row_number() over(order by to_date(last_located_time, 'dd.mm.rrrr')) rn 
      from (select last_located_time, name_common, code_employee 
        from daily_report     
       where insert_date = trunc(sysdate-3) and device_name like '%SM-T116IR') a) 
where rn = 1