Question

我使用此代码创建了一个名为TaxLots的表：

CREATE TABLE Portfolio.TaxLots
(
    Ticker varchar(22) NOT NULL,
    SecurityDescription varchar(50) NOT NULL,
    Class varchar(15) NULL,
    Ccy varchar(5) NULL,
    LSPosition char(3) NULL,
    Date date NULL,
    Quantity int NULL,
    LocAvgCost decimal(8,3) NULL,
    LocTaxCostBasis int NULL,
    LocMktVal int NULL,
    BaseAvgCost decimal(8,3) NULL,
    BaseTaxCostBasis int NULL,
    BaseMktVal int NULL,
    BaseUNRL int NULL,
    DateCreated DATE NOT NULL DEFAULT Cast(GetDate() as Date)
)
GO

然后我使用以下代码创建了第二个名为BusinessDates的表：

CREATE TABLE Portfolio.BusinessDates
(
    Date date NOT NULL,
)
GO

我使用所有相关数据填充了两个表，现在我想创建一个名为TaxLotsHistory的视图，其中包含Taxlots表中的所有列以及另一个名为ReportDate的列从BusinessDates之前的DateCreated表中提取最后一个营业日期。

例如：如果DateCreated日期为2016-08-15，则ReportDate应为2016-08-12。从逻辑上讲，

ReportDate = Max(BusinessDate) 
where BusinessDate < DateCreated

但由于BusinessDate和DateCreated位于两个单独的表中，因此我无法弄清楚语法。我有一些类似的东西，但它不起作用：

CREATE VIEW Portfolio.TaxLotsHistory
AS
    SELECT
        Ticker, SecurityDescription, Class, Ccy, LSPosition, Date, Quantity, 
        LocAvgCost, LocTaxCostBasis, LocMktVal, BaseAvgCost, BaseTaxCostBasis, 
        BaseMktVal, BaseUNRL, DateCreated,
        (SELECT MAX(BusinessDate) 
         FROM Portfolio.BusinessDates D As ReportDate 
         WHERE D.BusinessDate) < T.DateCreated
    FROM
        Portfolio.TaxLots T

我目前正在

关键字＆＃39; AS＆＃39;附近的语法错误不正确

但我确定代码还有其他问题。感谢。

Answer 1

试试这个

CREATE VIEW Portfolio.TaxLotsHistory
AS
Select  Ticker, SecurityDescription, Class, Ccy, LSPosition, Date, Quantity, 
LocAvgCost, LocTaxCostBasis, LocMktVal, BaseAvgCost, BaseTaxCostBasis, 
BaseMktVal, BaseUNRL, DateCreated,
( Select Max(D.BusinessDate) 
  From Portfolio.BusinessDates D
  Where D.BusinessDate) < T.DateCreated ) As ReportDate
From Portfolio.TaxLots T

Answer 2

使用Apply ..

Create view vwname as
Select  Ticker, SecurityDescription, Class, Ccy, LSPosition, Date, Quantity, 
LocAvgCost, LocTaxCostBasis, LocMktVal, BaseAvgCost, BaseTaxCostBasis, 
BaseMktVal, BaseUNRL, DateCreated,b.reportdate
from
Portfolio.TaxLots t
cross apply
(
(Select Max (BusinessDate) As ReportDate  From Portfolio.BusinessDates D 
Where D.BusinessDate) < T.DateCreated
) b

TSQL：使用来自两个单独表的计算列创建视图

2 个答案: