問題與子查詢

Question

我有以下查詢：

1. 的packgae的狀態必須爲「出貨：

   SELECT SP.PACKAGEID,SP.ORDERID,PTS.CREATIONDATE AS SHIPPEDDATE 
   
   FROM PACKAGES SP 
   
   INNER JOIN 
   
   (
   SELECT * FROM 
   (
       SELECT *FROM PACKAGE_STATISTICS A 
       WHERE((A.PACKAGEID=SP.PACKAGEID) 
       AND(A.PACKAGESTATUS=2) 
       AND(TO_DATE(to_char(A.CREATIONDATE,'mm/dd/yyyy'),'mm/dd/yyyy') 
        BETWEEN TO_DATE('2/19/2011','mm/dd/yyyy') AND (TO_DATE('3/21/2011','mm/dd/yyyy')))) 
       ORDER BY A.CREATIONDATE 
   
   
   
   ) WHERE ROWNUM<2 
   
   ) PTS ON PTS.PACKAGEID=SP.PACKAGEID 
   WHERE SP.ISSUEID IN(402783) 
   

   該查詢基於以下條件軟件包表選擇包詳細信息「（通過將PACKAGE_STATISTICS的PACKAGESTATUS列設置爲2來表示）

2. 如果包中有多個」發貨「條目，請選擇最新的（基於CREATIONDATE列值）。

當我運行上面的查詢時，它拋出ORA-00904錯誤，因爲級別2的子查詢會刷新表名。所以，我已經修改了查詢，如下所示：

SELECT SP.PACKAGEID,SP.ORDERID, (SELECT CREATIONDATE FROM 

(
     SELECT *FROM PACKAGE_STATISTICSA 
     WHERE 
((A.PACKAGEID=SP.PACKAGEID) 
     AND(A.PACKAGESTATUS=2) 
     AND(TO_DATE(to_char(A.CREATIONDATE,'mm/dd/yyyy'),'mm/dd/yyyy') 
      BETWEEN TO_DATE('2/19/2011','mm/dd/yyyy') AND (TO_DATE('3/21/2011','mm/dd/yyyy')))) 
     ORDER BY A.CREATIONDATE 
    ) WHERE ROWNUM<2) AS SHIPPEDDATE 
FROM PACKAGESSP 
WHERE 
(SHIPPEDDATE BETWEEN TO_DATE('2/19/2011','mm/dd/yyyy') 
    AND (TO_DATE('3/21/2011','mm/dd/yyyy'))) 
    AND SP.ISSUEID IN(402783) 

它再次扔ORA-00904發貨日期無效的。 請讓我知道我該怎麼做？ 感謝大家， Pradeep

Answer 1

如果您只需要來自PACKAGE_STATISTICS的最新日期，爲什麼不簡單使用MAX（CREATION_DATE）？與最新的creationdate

SELECT SP.PACKAGEID 
     ,SP.ORDERID 
     ,MAX(A.CREATIONDATE) AS SHIPPEDDATE 
    FROM PACKAGES SP 
INNER JOIN PACKAGE_STATISTICS A ON A.PACKAGEID = SP.PACKAGEID 
WHERE SP.ISSUEID IN (402783) 
    AND A.PACKAGEID = SP.PACKAGEID 
    AND A.PACKAGESTATUS = 2 
    AND TO_DATE(to_char(A.CREATIONDATE, 'mm/dd/yyyy'), 'mm/dd/yyyy') BETWEEN 
     TO_DATE('2/19/2011', 'mm/dd/yyyy') AND 
     TO_DATE('3/21/2011', 'mm/dd/yyyy') 
GROUP BY SP.PACKAGEID 
     ,SP.ORDERID 

如果你想從package_statistics的行更多詳細信息，請考慮使用分析功能：：我現在不能測試，但你可能需要這樣的查詢

SELECT SP.PACKAGEID 
     ,SP.ORDERID 
     ,PTS.* 
    FROM PACKAGES SP 
INNER JOIN (SELECT ROW_NUMBER() OVER(PARTITION BY PACKAGEID ORDER BY CREATIONDATE DESC) rn 
        ,A.* 
       FROM PACKAGE_STATISTICS A 
       WHERE A.PACKAGESTATUS = 2 
       AND TO_DATE(to_char(A.CREATIONDATE, 'mm/dd/yyyy') 
          ,'mm/dd/yyyy') BETWEEN 
        TO_DATE('2/19/2011', 'mm/dd/yyyy') AND 
        TO_DATE('3/21/2011', 'mm/dd/yyyy')) PTS ON PTS.PACKAGEID = 
                   SP.PACKAGEID 
                  AND PTS.RN = 1;