Question

我有一个场景，根据另一个表中的Lookup来分割日期。

这里BillDetails和ClientFiscal是源表，BillDetailNormalized是目标表。

对于BillDetailNormalized中的第一条记录，ServiceBeginKey将来自Billdetail Table，即2011-11-09，ServiceEndKey将取决于两个因素：

如果ClientFiscal中没有相应的Enddate，那么它将是月末

否则将是相应的日期这里来自于它在ClientFiscal表中的共享示例，所以它将是2011-12-10

下一条记录ServiceBeginKey将是2011-12-11，ServiceEndKey将是2011-12-31，因为该月的ClientFiscal表中没有相应的记录

CREATE TABLE BillDetails
(
ClientKey INT,
BillDetailKey INT
,ServiceBeginKey DATETIME   
,ServiceEndKey DATETIME
);

INSERT INTO BillDetails VALUES (9,296643,'2011-11-09','2012-01-10');


CREATE TABLE ClientFiscal
(
ClientKey INT,
FiscalBeginKey DATETIME,
FiscalEndKey DATETIME
);

INSERT INTO ClientFiscal VALUES (9,'2011-11-13','2011-12-10');
INSERT INTO ClientFiscal VALUES (9,'2011-12-11','2012-01-07');
INSERT INTO ClientFiscal VALUES (9,'2012-01-08','2012-02-04');


CREATE TABLE BillDetailNormalized
(
BillDetailsNormalizedKey INT,
BillDetailKey INT,
ClientKey INT,
ServiceBeginKey DATETIME,
ServiceEndKey DATETIME
);


INSERT INTO BillDetailNormalized VALUES (443171,296643,9,'2011-12-09','2011-12-10');
INSERT INTO BillDetailNormalized VALUES (443172,296643,9,'2011-12-11','2011-12-31');
INSERT INTO BillDetailNormalized VALUES (443173,296643,9,'2012-01-01','2012-01-07');
INSERT INTO BillDetailNormalized VALUES (443174,296643,9,'2012-01-08','2012-01-10');

Answer 1

drop table #BillDetails
drop table #ClientFiscal
drop table #BillDetailNormalized

CREATE TABLE #BillDetails
(
ClientKey INT,
BillDetailKey INT
,ServiceBeginKey DATETIME   
,ServiceEndKey DATETIME
);


CREATE TABLE #ClientFiscal
(
ClientKey INT,
FiscalBeginKey DATETIME,
FiscalEndKey DATETIME
);

CREATE TABLE #BillDetailNormalized
(
BillDetailsNormalizedKey INT IDENTITY(1,1) NOT NULL,
BillDetailKey INT,
ClientKey INT,
ServiceBeginKey DATETIME,
ServiceEndKey DATETIME
);


INSERT INTO #BillDetails VALUES (9,296643,'2011-11-09','2012-01-10');

INSERT INTO #ClientFiscal VALUES (9,'2011-11-13','2011-12-10');
INSERT INTO #ClientFiscal VALUES (9,'2011-12-11','2012-01-07');
INSERT INTO #ClientFiscal VALUES (9,'2012-01-08','2012-02-04');

INSERT INTO #BillDetailNormalized (BillDetailKey, ClientKey, ServiceBeginKey, ServiceEndKey)
SELECT X.BillDetailKey, X.ClientKey, X.FiscalBeginKey, X.ServiceEndKey 
FROM (
       SELECT B.BillDetailKey,
              C.ClientKey,
               C.FiscalBeginKey,              
              'ServiceEndKey' =
              CASE 
                 WHEN  B.ServiceEndKey IS NULL THEN DATEADD(d, -1, DATEADD(m, DATEDIFF(m, 0, B.ServiceEndKey) + 1, 0))
                 ELSE  B.ServiceEndKey            
              END             
       FROM #ClientFiscal C
       LEFT JOIN #BillDetails B
       on C.ClientKey = B.ClientKey
       ) X
select *
from #ClientFiscal

select *
from #BillDetailNormalized

在SQL中拆分日期

1 个答案: