Question

所以我有一个查询，我想抓住一个包扫描到HAZ位置的第一个事务时间，如下面的查询所示：

SELECT 
LOCATION, 
COUNT(PACKAGE_ID) OVER (PARTITION BY LOCATION) AS PACKAGE_COUNT,
PACKAGE_ID,
(TRUNC(SYSDATE)-TRUNC(DATE_RECEIVED)) AS DAYS_AGED,
ORDER_NUMBER
FROM
    (SELECT 
    DISTINCT
    LOCATION, 
    PACKAGE_ID,
    ORDER_NUMBER,
    FIRST_VALUE(TRAN_DATE) OVER (PARTITION BY PACKAGE_ID ORDER BY TRAN_DATE) AS DATE_RECEIVED
    FROM    
        (SELECT
        (CASE WHEN SPM.PARENT_PACKAGE_ID IS NULL THEN SPM.PACKAGE_ID ELSE SPM.PARENT_PACKAGE_ID END) AS PACKAGE_ID, 
        SUBSTR(SPM.ORDER_NUMBER,1,5) AS ORDER_NUMBER,
        SPM.LOCATION AS LOCATION,
        PL.TRAN_DATE AS TRAN_DATE
        FROM SO_PACKAGE_MASTER SPM
        INNER JOIN PACKAGE_LOG PL ON PL.PACKAGE_ID = SPM.PACKAGE_ID
        WHERE SPM.LOCATION LIKE '%HAZ%'
        AND PL.DESTINATION LIKE '%HAZ%'
        AND SPM.SHIPPED = 'N'
        AND SPM.STATUS = 'C'))
ORDER BY LOCATION, DAYS_AGED DESC, PACKAGE_ID;

我得到以下数据集：

HAZOUT-01   13  1894980 254 04591
HAZOUT-01   13  1895207 158 04591
HAZOUT-01   13  1510372 85  28236
HAZOUT-01   13  1510374 85  28236
HAZOUT-01   13  1510535 85  28237
HAZOUT-01   13  1510537 85  28237
HAZOUT-01   13  1812277 36  MSR00
HAZOUT-01   13  1816943 29  22062
HAZOUT-01   13  1816947 29  22062
HAZOUT-01   13  1852815 28  27677
HAZOUT-01   13  1855792 28  27764
HAZOUT-01   13  1902199 2   22065
HAZOUT-01   13  1902202 2   22065

但如果我在我的package_log表中查找1894980，则表明它没有显示254天：

1894980 HAZOUT-01   15-MAR-18

任何想法？（系统日期是当前日期EST）

Answer 1

您不是要按包ID要求第一个值。如果这是您想要的，请将其包含在partition by：

中

SELECT PL.PACKAGE_ID, PL.DESTINATION,
       FIRST_VALUE(PL.TRAN_DATE) OVER (PARTITION BY PL.PACKAGE_ID ORDER BY PL.TRAN_DATE) AS DATE_RECEIVED
FROM SO_PACKAGE_MASTER SPM INNER JOIN
     PACKAGE_LOG PL
     ON PL.PACKAGE_ID = SPM.PACKAGE_ID
WHERE PL.DESTINATION LIKE '%HAZ%' AND
      SPM.SHIPPED = 'N' AND
      SPM.STATUS = 'C';

我不确定您是否也希望在DESTINATION中使用PARTITION BY。

您的查询返回DESTINATION的第一个值。

顺便说一句，你也可以使用MIN()来表示这个逻辑：

SELECT PL.PACKAGE_ID, PL.DESTINATION,
       MIN(PL.TRAN_DATE) OVER (PARTITION BY PL.PACKAGE_ID) AS DATE_RECEIVED
FROM SO_PACKAGE_MASTER SPM INNER JOIN
     PACKAGE_LOG PL
     ON PL.PACKAGE_ID = SPM.PACKAGE_ID
WHERE PL.DESTINATION LIKE '%HAZ%' AND
      SPM.SHIPPED = 'N' AND
      SPM.STATUS = 'C';

我认为没有理由改用FIRST_VALUE()。

无法获得正确的第一个值

1 个答案: