Question

ORG_ITEM表包含重复的ID。这些ID显示相同ID的不同MFR和PART_NO。这导致我的查询返回具有相同ID的多个行。如何将这些行放入一行，每个MFR和PART_NO作为一个单独的列？

SELECT
PART_LOC.CLASS,
PART_LOC.ID,
ORG.MFR,
ORG_ITEM.PART_NO,
PART_LOC.STORAGE_LOC,
PART_LOG.QTY,
COST.UNIT_COST

FROM
PART_LOC
LEFT JOIN COST on PART_LOC.ID = COST.ID
LEFT JOIN ORG_ITEM on PART_LOC.ID = ORG_ITEM.ID
LEFT JOIN ORG on ORG_ITEM.MFR = ORG.MFR

WHERE
PART_LOC.STORAGE_LOG = :Facility

目前返回：

CLASS   ID      MFR      PART_NO   STORAGE_LOC  QTY    COST
  3    1234   Grainger    123F6       CRIB       6    12.67
  3    1234   Hagerty     asd45       CRIB       6    12.67
  3    1234     MSC       poi98       CRIB       6    12.67

希望它返回：

CLASS   ID   MFR-PART_NO1   MFR-PART_NO2   MFR-PART_NO3  STORAGE_LOC  QTY COST
  3    1234 Grainger-123F6  Hagerty-asd45    MSC-poi98      CRIB       6  12.67

Answer 1

你可以尝试这样的事情。对于每个ID，我假设最多有五个制造商。我还假设你并不关心制造商的展示顺序。如果您关心（例如，如果您希望它们在每行中从左到右按字母顺序排列），您可以在我添加到内部查询的ROW_NUMBER（）函数中添加排序条件;现在它显示＆＃34;按null排序＆＃34; （这意味着你对命令漠不关心。）

如果每个ID超过五个制造商，此查询仍然有效;输出中只显示五个制造商（六个，八个或十个）。

select class, id, mfr_part1, mfr_part2, mfr_part3, mfr_part4, mfr_part5, 
       storage_loc, qty, unit_cost
from   (
  SELECT
  PART_LOC.CLASS,
  PART_LOC.ID,
  ORG.MFR,
  ORG_ITEM.PART_NO,
  PART_LOC.STORAGE_LOC,
  PART_LOG.QTY,
  COST.UNIT_COST,
  row_number() over (partition by part_loc.id order by null) as RN
  FROM
  PART_LOC
  LEFT JOIN COST on PART_LOC.ID = COST.ID
  LEFT JOIN ORG_ITEM on PART_LOC.ID = ORG_ITEM.ID
  LEFT JOIN ORG on ORG_ITEM.MFR = ORG.MFR
  WHERE
  PART_LOC.STORAGE_LOG = :Facility
  )
pivot ( max(mfr || '-' || part_no)
        for RN in (1 as mfr_part1, 2 as mfr_part2, 3 as mfr_part3,
                   4 as mfr_part4, 5 as mfr_part5)
      )
;

列

1 个答案: