带有数据透视表和聚合函数的Oracle SQL查询

Question

我在Oracle中的数据透视表遇到问题。我有一个工作示例，可以获取某些库存项目的计数。有两种类型的计数，但我只占一种类型。我需要改变我的示例以合并两种类型的计数，并保持数据彼此“在线”（如果有意义的话）。我会尽力解释。考虑以下查询：

select * 
from (select state_code, city_code, equipment_type, sum(AVAILABLE_COUNT) as available_count 
    from EQUIP_VIEW_TABLE 
    group by state_code, city_code, equipment_type 
    ) 
pivot (max(available_count) 
    for (equipment_type) in 
    ('Sandbag' "CNT_SANDBAG", 
     'Gabion Basket' "CNT_GABION_BASKET", 
     'Rapid Deployment Floodwall' "CNT_RAPID_DEPLOYMENT_FLOODWALL", 
     'Portable Coffer Dam' "CNT_PORTABLE_COFFER_DAM", 
     'Polyethylene Sheeting' "CNT_POLYETHYLENE_SHEETING", 
     'Pump' "CNT_PUMP")) 

现在，此查询适用于一种类型的计数（“可用计数”）。该数据是所有对应于国家/城市在同一行，并没有数据被复制，即

STATE CITY  SANDBAGS BASKETS FLOODWALL DAM SHEET PUMP 
Texas Austin 12  45  11   16 89  8 

我需要考虑不同类型的计数。我需要考虑某些设备上的“可用计数长度”。我试着用下面的查询来实现：

SELECT * 
FROM (SELECT unique state_code, city_code, 
    equipment_type AS equipment_type_cnt, equipment_type as equipment_type_len, 
    sum(AVAILABLE_COUNT) AS available_count, SUM(AVAILABLE_COUNT_LENGTH) AS available_count_length 
    FROM EQUIP_VIEW_TABLE 
    GROUP BY state_code, city_code, equipment_type  ) 
pivot (MAX(available_count) 
    FOR (equipment_type_cnt) IN 
    ('Sandbag' "CNT_SANDBAG", 
     'Polyethylene Sheeting' "CNT_POLYETHYLENE_SHEETING", 
     'Pump' "CNT_PUMP")) 

pivot (MAX(available_count_length) 
    FOR (equipment_type_len) IN 
    ('Gabion Basket' "CNT_GABION_BASKET", 
     'Rapid Deployment Floodwall' "CNT_RAPID_DEPLOYMENT_FLOODWALL", 
     'Portable Coffer Dam' "CNT_PORTABLE_COFFER_DAM")) 

我想基本上添加另一个轴部，而且我认为这是工作，但它重复值，并将它们放在不同的行。结果集看起来像

STATE CITY  SANDBAGS SHEET PUMP BASKET FLOODWALL DAM 
Texas Austin 12  89  8  16  -   - 
Texas Austin 12  89  8  -  11   - 
Texas Austin 12  89  8  -  -   16 

它复制在我的结果集的行。我会在同一行上需要所有这些值。我一直在尝试不同的想法，但我仍然得到重复的价值观。任何帮助，将不胜感激。在此先感谢您的帮助。如果我的问题太复杂，或者我没有足够解释，我会发布更多信息。谢谢。

Answer 1

如果我理解你想要做什么，我会继续前进的列使用最多到主查询的决定，用case表达单sum()内：

SELECT unique state_code, city_code, 
    equipment_type, 
    sum(case when equipment_type in ('Gabion Basket', 
     'Rapid Deployment Floodwall', 'Portable Coffer Dam') 
    then AVAILABLE_COUNT_LENGTH 
    else AVAILABLE_COUNT end) AS chosen_count 
FROM EQUIP_VIEW_TABLE 
GROUP BY state_code, city_code, equipment_type 

离开原因如下：

SELECT * 
FROM (SELECT unique state_code, city_code, 
    equipment_type, 
    sum(case when equipment_type in ('Gabion Basket', 
     'Rapid Deployment Floodwall', 'Portable Coffer Dam') 
     then AVAILABLE_COUNT_LENGTH 
     else AVAILABLE_COUNT end) AS chosen_count 
    FROM EQUIP_VIEW_TABLE 
    GROUP BY state_code, city_code, equipment_type) 
pivot (max(chosen_count) 
    for (equipment_type) in 
    ('Sandbag' "CNT_SANDBAG", 
     'Gabion Basket' "CNT_GABION_BASKET", 
     'Rapid Deployment Floodwall' "CNT_RAPID_DEPLOYMENT_FLOODWALL", 
     'Portable Coffer Dam' "CNT_PORTABLE_COFFER_DAM", 
     'Polyethylene Sheeting' "CNT_POLYETHYLENE_SHEETING", 
     'Pump' "CNT_PUMP"))