Question

我有一个更新查询，用于运行最终标量值基于派生查询的位置。我需要确保在最外层的查询中更新正确的行。如何从RxTransactionID上的DERIVED2查询加入到此示例中的最外层查询？

注意：不允许使用此WHERE子句中的“A.RxTransactionID”。 WHERE Fact.Adherence.RxTransactionId = A.RxTransactionID

UPDATE Fact.Adherence SET Fact.Adherence.LAST_MPR = (

SELECT LAST_MPR FROM
(
SELECT
DERIVED1.IRXLocationId, DERIVED1.RxNumber, DERIVED1.RefillNumber, DERIVED1.RxTransactionID, DERIVED1.ClientId, DERIVED1.CompletedDate, DERIVED1.NextCompletedDate,
LAST_MPR = NULLIF(CAST(CAST(COALESCE(DaysSupply,    0) as decimal)  / NULLIF(CAST(COALESCE(DATEDIFF(DAY, DERIVED1.CompletedDate, DERIVED1.NextCompletedDate), 0) as decimal), 0)as decimal(12,4)), 0)
FROM
    (SELECT
    [CompletedDate] As [CompletedDate],
    NextCompletedDate = (SELECT  -- Will be the second most recent complete date.
    TOP 1 AA.[CompletedDate] FROM Fact.RxTransaction AA WHERE AA.RxId = C.RxId AND COALESCE(A.RefillNumber + 1,0) = AA.RefillNumber AND AA.RxID = C.RxID),
    A.RxNumber, [DaysSupply], [RefillNumber], C.[RxID], A.RxTransactionID, A.ClientId, A.IRXLocationId

    FROM [Fact].[Adherence] A
    INNER JOIN Dimension.RX C on A.RxId = C.RxId
    WHERE A.CompletedDate > DATEADD(MONTH, -6, GETDATE())
    ) DERIVED1
ORDER BY IRXLocationId, RxNumber, RefillNumber desc) DERIVEDA
)

WHERE Fact.Adherence.RxTransactionId = A.RxTransactionID

Answer 1

如果将派生值和查找键放入Fact.Adherence到临时表中，则可以对这两个表的连接执行更新语句。

这里有一个关于如何进行更新加入的好例子：Update Join Example

从DERIVED QUERY更新 - SQL

1 个答案: