需要从另一个表中找到的一列更新一个表中的多个不同列

Question

我有两张表，TBL_A 和 TBL_B。

TBL_A 如下所示：

TBL_B 如下所示：

我需要根据在 TBL_A 中找到的与特定状态相对应的 DATETIME 信息更新 TBL_B，因此：

 when status = 'CLAIMED' put DATETIME in CLAIMED_DATETIME
 when status = 'BOUGHT' put DATETIME in BOUGHT_DATETIME
 when status = 'RETURNED' put DATETIME in RETURNED_DATETIME

我有这个问题：

   MERGE INTO TBL_B B
USING (
      SELECT * FROM TBL_A
    PIVOT(MIN(ACCOUNT_REWARD_UPDATED_AT_DATETIME) FOR ACCOUNT_REWARD_STATUS IN ('claimed', 'bought', 'returned')) 
     AS P (number_id, country, amount, currency, file_tp, ingestion_time, claimed, bought, returned)
) A ON (
       A.number_id = B.number_id, 
    and  A.country = B.country, 
    and A.amount = B.amount, 
    and A.currency = B.currency, 
    and A.file_tp = B.file_tp 
    and A.ingestion_time = B.ingestion_time
 )
WHEN MATCHED THEN
  UPDATE SET
    B.CLAIMED_DATETIME = IFF(A.claimed IS NOT NULL, A.claimable , '2999-12-31 23:59:5'),
    B.BOUGHT_DATETIME = IFF(A.bought IS NOT NULL, A.claimed , '2999-12-31 23:59:5'),
    B.RETURNED_DATETIME = IFF(A.reverted IS NOT NULL, A.reverted, '2999-12-31 23:59:5'); 

当我加入 ALL 列时，file_tp 和 ingestion_time 对于每个状态（认领、购买和退回）都是不同的，而其余列对于每个状态都是相同的。当我运行上面的查询时，它只更新 1 个 DATE，而不是全部。我意识到这是因为我无法加入 FILE_TP 和 INGESTION_TIME，因为每个状态都不同。但是，当我从连接条件中删除这些时，我收到一个错误：

   MERGE INTO TBL_B B
USING (
      SELECT * FROM TBL_A
    PIVOT(MIN(DATETIME) FOR STATUS IN ('claimed', 'bought', 'returned')) 
     AS P (number_id, country, amount, currency, file_tp, ingestion_time, claimed, bought, returned)
) A ON (
       A.number_id = B.number_id, 
    and  A.country = B.country, 
    and A.amount = B.amount, 
    and A.currency = B.currency, 
    --and A.file_tp = B.file_tp 
    --and A.ingestion_time = B.ingestion_time
 )
WHEN MATCHED THEN
  UPDATE SET
    B.CLAIMED_DATETIME = IFF(A.claimed IS NOT NULL, A.claimable , '2999-12-31 23:59:5'),
    B.BOUGHT_DATETIME = IFF(A.bought IS NOT NULL, A.claimed , '2999-12-31 23:59:5'),
    B.RETURNED_DATETIME = IFF(A.reverted IS NOT NULL, A.reverted, '2999-12-31 23:59:5'); 

错误：

Duplicate row detected during DML action Row Values: 

有谁知道我该如何解决这个问题？

Answer 1

我怀疑枢轴没有按照您的预期做 - 检查它的结果。

尝试改变这个：

      SELECT * FROM TBL_A
    PIVOT(MIN(DATETIME) FOR STATUS IN ('claimed', 'bought', 'returned')) 
     AS P (number_id, country, amount, currency, file_tp, ingestion_time, claimed, bought, returned)
) A ON (
       A.number_id = B.number_id, 
    and  A.country = B.country, 
    and A.amount = B.amount, 
    and A.currency = B.currency, 
    --and A.file_tp = B.file_tp 
    --and A.ingestion_time = B.ingestion_time

到这里：

    SELECT * 
    FROM (select number_id, country, amount, currency from TBL_A)
    PIVOT(MIN(DATETIME) FOR STATUS IN ('claimed', 'bought', 'returned')) 
    AS P (number_id, country, amount, currency, claimed, bought, returned)
) A ON (
    A.number_id = B.number_id, 
    and A.country = B.country, 
    and A.amount = B.amount, 
    and A.currency = B.currency,