聚合时间戳

Question

我正在使用以下查询：

    SELECT contract,
     source_ref1 AS "ORDER_NO",
     part_no,
     ifsapp.inventory_part_api.Get_description( contract, part_no ) as "DESCRIPTION",
     ifsapp.inventory_part_api.Get_unit_meas( contract, part_no ) as "UNIT_MEAS",
     date_applied,
     (SELECT work_center_no FROM shop_order_operation where inventory_transaction_hist2.source_ref1 = shop_order_operation.order_no) AS "WORK_CENTER",
    direction,
       SUM( quantity ) AS "QUANTITY",
       ( CASE
           WHEN ( ( To_char( date_time_created, 'HH24:MI ' ) BETWEEN '05:45 ' AND '17:44' ) AND
                  date_applied = date_created ) THEN 'SHIFT1'
           WHEN (( ( To_char( date_time_created, 'HH24:MI' ) BETWEEN '17:45' AND '24:00' )  OR
                   ( To_char( date_time_created, 'HH24:MI' ) BETWEEN '00:00' AND '05:44' ) AND
                   date_applied = date_created )) THEN 'SHIFT2'
           ELSE 'MANUAL_ADJUST'
         END ) AS "SHIFT"
FROM   ifsapp.INVENTORY_TRANSACTION_HIST2
WHERE  part_no IN (select pc.part_no from ifsapp.HH_INV_PART_CHARS pc where pc.accounting_group = '400') AND
       contract IN ( 'DE1', 'DE2' ) AND
       transaction_code LIKE '%REC%' AND
       direction IN ( '+', '-' ) AND
       source_ref_type = 'Shop Order' AND
       To_char( date_applied, 'YYYY-MM-DD' ) BETWEEN '2017-01-01' AND '2017-12-26'
GROUP BY contract,source_ref1, part_no, ifsapp.inventory_part_api.Get_description( contract, part_no ), 
ifsapp.inventory_part_api.Get_unit_meas( contract, part_no ), location_no, date_applied, direction,
date_time_created, date_created
ORDER  BY date_applied 

此查询返回18292次点击。

如果我删除CASE语句，并从GROUP BY部分删除DATE_TIME_CREATED和DATE_CREATED，则查询将返回1356次命中。

我们使用CASE声明来确定我们的产品产生了什么样的转变。 date_time_created字段基本上是时间戳。它是该表上唯一可用于确定产品生产转移的字段。

但是，它也导致我们获得的命中率是没有它的10倍。

以ORDER_NO 349321为例。如图所示运行查询，我得到61次点击。删除CASE语句，并从GROUP BY部分删除DATE_TIME_CREATED和DATE_CREATED，我得到两个命中。

我们没有两班完成的订单。因此，我不需要知道ORDER_NO 349321的每个事务的时间戳，而且我不需要知道每个时间戳是在Shift 1还是Shift 2.我只需要知道该订单的交易是否是在Shift 1或Shift 2中完成。

有没有办法聚合我从该案例陈述中得到的信息来解决这个问题？我尝试在我的case语句中使用MAX和AVG，但它返回了相同数量的结果。

Answer 1

如果您不需要投影DATE_TIME_CREATED和DATE_CREATED列，请在进行聚合处理之前尝试在子查询中执行“SHIFT”计算。像这样的东西：

SELECT 
    contract,
    source_ref1 AS "ORDER_NO",
    part_no,
    ifsapp.inventory_part_api.Get_description( contract, part_no ) AS "DESCRIPTION",
    ifsapp.inventory_part_api.Get_unit_meas( contract, part_no ) AS "UNIT_MEAS",
    date_applied,
    (SELECT work_center_no FROM shop_order_operation WHERE inventory_transaction_hist2.source_ref1 = shop_order_operation.order_no) AS "WORK_CENTER",
    direction,
    SUM(quantity) AS "QUANTITY",
    "SHIFT"
FROM 
(
    SELECT contract, source_ref1, part_no, date_applied, direction, quantity, 
    ( CASE
       WHEN ( ( TO_CHAR( date_time_created, 'HH24:MI ' ) BETWEEN '05:45 ' AND '17:44' ) AND
              date_applied = date_created ) THEN 'SHIFT1'
       WHEN (( ( TO_CHAR( date_time_created, 'HH24:MI' ) BETWEEN '17:45' AND '24:00' )  OR
               ( TO_CHAR( date_time_created, 'HH24:MI' ) BETWEEN '00:00' AND '05:44' ) AND
               date_applied = date_created )) THEN 'SHIFT2'
       ELSE 'MANUAL_ADJUST'
     END ) AS "SHIFT"
    FROM ifsapp.INVENTORY_TRANSACTION_HIST2
    WHERE part_no IN (SELECT pc.part_no FROM ifsapp.HH_INV_PART_CHARS pc WHERE pc.accounting_group = '400') 
    AND contract IN ( 'DE1', 'DE2')
    AND transaction_code LIKE '%REC%' 
    AND direction IN ( '+', '-') 
    AND source_ref_type = 'Shop Order' 
    AND TO_CHAR( date_applied, 'YYYY-MM-DD') BETWEEN '2017-01-01' AND '2017-12-26'
) src
GROUP BY 
    contract,
    source_ref1, 
    part_no, 
    ifsapp.inventory_part_api.Get_description(contract, part_no), 
    ifsapp.inventory_part_api.Get_unit_meas(contract, part_no), 
    location_no, 
    date_applied, 
    direction
--  ,date_time_created, 
--  date_created
ORDER  BY date_applied 

我没有任何DDL /数据来测试查询，所以你肯定会得到一些语法错误。但试一试，让我知道它是怎么回事。

另外，检查你的“SHIFT”计算，看起来你有一个没有括号的浮动“OR”。