Microsoft Dynamics 中的日期部分函数错误 SQL

Question

我目前正在尝试在 Microsoft Dynamics AX2012 中执行 SQL 查询，以使用 DATEPART 函数输出从交货日期算起的年份。

我在 AOT 中创建了一个 class "CustRerportDemo"，并在尝试执行查询时，即仅从 "deliverydate" 字段中查询出年份 table "SalesTable"。遇到错误提示：

Variable Datepart has not been declared

我知道 datepart 是 SQL 中的函数调用，不需要声明。因此，我想知道为什么以及如何纠正这个问题？我只是想显示从交货日期算起的年份。

因此，如果日期是13/06/2016，那么查询出来的结果就是2016或者16。我附上了以下代码。请帮忙。

public void processReport()
{
CustTable custTable;
SalesTable salesTable;

//select all customers
while select * from custTable
{
    //clear the temporary table
    custReportRDPTmp.clear();
    //assign customer account and name
    custReportRDPTmp.CustAccount = custTable.AccountNum;
    custReportRDPTmp.Name = custTable.name();
    //select count of invoiced sales order of customer
    select count(RecId) from salesTable
    where salesTable.CustAccount == custTable.AccountNum
    && salesTable.SalesStatus == SalesStatus::Invoiced;
    custReportRDPTmp.SalesOrderInvoiceCount = int642int(salesTable.RecId);
    //New Column to display PaymentMode
    select PaymMode
    from salesTable
    where salesTable.PaymMode == custTable.PaymMode;
    custReportRDPTmp.Payment = SalesTable.PaymMode;
    //New Column to display SalesAmountTotal by drawing from a different table using a JOIN statement
    select smmSalesAmountTotal
    from salesTable;
    custReportRDPTmp.SalesAmt = salesTable.smmSalesAmountTotal;

    //New Column to display month from delivery date
    select DATEPART("yyyy", DeliveryDate) as year
    // To extract  a single value for year and month from DeliveryDate in SalesTable
    from salesTable

    /* where payment in (select count(payment) from salesTable
     where salesTable.CustAccount == custTable.AccountNum
    &&*/

    //insert in temporary table buffer
    custReportRDPTmp.insert();
}
}

编辑代码：

select firstOnly DeliveryDate
from salesTable
where salesTable.CustAccount == custTable.AccountNum;
//Get Year from date
custReportRDPTmp.DateTimeStamp = year(salesTable.DeliveryDate);

结果如图：

Answer 1

X++ select 语句是 not SQL 因此你不应该假设任何或所有 SQL 函数在 X++ 中可用；他们不是！

有个日期函数，你搜索的那个叫做year。

它不属于 select 不过：

select firstonly DeliveryDate from salesTable;
y = year(salesTable.DeliveryDate);

Microsoft Dynamics 中的日期部分函数错误 SQL

Datepart function error in Microsoft Dynamics SQL

sql

axapta

x++

dynamics-ax-2012

datepart