Question

我在oracle中使用数据透视表时出现问题。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，但我只考虑一种类型。我需要改变我的例子以包含两种类型的计数并保持数据＆＃34;在线＆＃34;彼此（如果这是有道理的）。我会尽力解释。请考虑以下查询：

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，此查询适用于一种计数（＆＃34;可用计数＆＃34;）。数据全部在与州/市相对应的同一行上，没有数据重复，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＆＃34;可用的计数长度＆＃34;在某些设备上。我尝试使用以下查询完成此操作：

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"))

我试图基本上添加另一个数据透视部分，我认为它正在工作，但它复制了值并将它们放在不同的行上。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

它在我的结果集中重复了一行。我需要在同一行上的所有这些值。我一直在尝试不同的想法，但我仍然得到重复的价值观。任何有关这方面的帮助将不胜感激。在此先感谢您的帮助。如果我的问题有点过于复杂或者我没有足够好解释，我会发布更多信息。感谢。

Answer 1

如果我了解您要执行的操作，我会决定将哪个列用于主查询，并在单个case中使用sum()表达式：

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

并保留枢轴原样：

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"))

带有Pivot和聚合函数

1 个答案: