Axapta 如何使用查询选择聚合字段？

我正在尝试使用addselectionfield选择4个字段。这4个字段中的2个是聚合（总和）字段。

我正在做以下工作：

            date fromDate = systemDateGet();
            date toDate = (systemDateGet() + 25);
            query          = new Query();
            qbds           = query.addDataSource(tableNum(MyTable));
            qbds.addSelectionField(fieldNum(MyTable, DateField));
            qbds.addSelectionField(fieldNum(MyTable, USDAmountField), SelectionField::Sum);
            qbds.addSelectionField(fieldNum(MyTable, CurrencyNameField));
            qbds.addSelectionField(fieldNum(MyTable, EURAmountField), SelectionField::Sum);
            qbr            = qbds.addRange(fieldNum(MyTable, DateField));
            qbr.value(queryRange(fromDate, toDate));

            queryRun       = new QueryRun(query);

调试时，我在queryRun中得到以下select语句：

SELECT SUM(EURAmountField) FROM MyTable(MyTable_1)
WHERE ((DateField >= {ts '2014-04-01 00:00:00.000'}
AND DateField <= {ts'2014-04-26 00:00:00.000'}))

从MyTable（MyTable_1）中选择总和（EURAmountField）
其中（（日期字段>={ts'2014-04-01 00:00:00.000'}
和DateField没有理由（我能想到）…这应该行得通，selectionfield应该添加到querybuilddatasource中。尝试同步、编译和/或重新启动客户端/aos

不过，您还必须在要选择的字段上添加group by字段。否则AX将不知道要选择的值，因为多个记录可能具有不同的值。例如，要选择CurrencyNameField，请将其添加为选择字段，并使用：

qbds.addGroupByField(fieldNum(MyTable, CurrencyNameField)); 

然后您将在CurrencyNameField字段中获得数据，但您将获得每个货币名称的总和

这似乎有效：

Query query;
QueryBuildDataSource qbds;
QueryBuildRange qbr;
QueryRun queryrun;

date fromDate = systemDateGet();
date toDate = (systemDateGet() + 25);
query          = new Query();
qbds           = query.addDataSource(tableNum(MyTable));
qbds.addGroupByField(fieldNum(MyTable, DateField));
qbds.addGroupByField(fieldNum(MyTable, CurrencyNameField));
qbds.addSelectionField(fieldNum(MyTable, DateField));
qbds.addSelectionField(fieldNum(MyTable, CurrencyNameField));
qbds.addSelectionField(fieldNum(MyTable, EURAmountField), SelectionField::Sum);
qbds.addSelectionField(fieldNum(MyTable, USDAmountField), SelectionField::Sum);
qbr            = qbds.addRange(fieldNum(MyTable, DateField));
qbr.value(queryRange(fromDate, toDate));

queryRun       = new QueryRun(query);

queryrun包含以下内容：

SELECT DateField, CurrencyNameField, SUM(EURAmountField), SUM(USDAmountField) 
FROM MyTable(MyTable_1) GROUP BY MyTable.DateField, MyTable.CurrencyNameField 
WHERE ((DateField>={ts '2014-04-01 00:00:00.000'} 
AND DateField<={ts '2014-04-26 00:00:00.000'}))

选择日期字段、CurrencyNameField、总和（EURAmountField）、总和（USDAmountField）
根据MyTable.DateField、MyTable.CurrencyNameField从MyTable（MyTable_1）组
其中（（日期字段>={ts'2014-04-01 00:00:00.000'}
和DateField没有理由（我能想到）…这应该行得通，selectionfield应该添加到querybuilddatasource中。尝试同步、编译和/或重新启动客户端/aos

不过，您还必须在要选择的字段上添加group by字段。否则AX将不知道要选择的值，因为多个记录可能具有不同的值。例如，要选择CurrencyNameField，请将其添加为选择字段，并使用：

qbds.addGroupByField(fieldNum(MyTable, CurrencyNameField)); 

然后您将在CurrencyNameField字段中获得数据，但您将获得每个货币名称的总和

这似乎有效：

Query query;
QueryBuildDataSource qbds;
QueryBuildRange qbr;
QueryRun queryrun;

date fromDate = systemDateGet();
date toDate = (systemDateGet() + 25);
query          = new Query();
qbds           = query.addDataSource(tableNum(MyTable));
qbds.addGroupByField(fieldNum(MyTable, DateField));
qbds.addGroupByField(fieldNum(MyTable, CurrencyNameField));
qbds.addSelectionField(fieldNum(MyTable, DateField));
qbds.addSelectionField(fieldNum(MyTable, CurrencyNameField));
qbds.addSelectionField(fieldNum(MyTable, EURAmountField), SelectionField::Sum);
qbds.addSelectionField(fieldNum(MyTable, USDAmountField), SelectionField::Sum);
qbr            = qbds.addRange(fieldNum(MyTable, DateField));
qbr.value(queryRange(fromDate, toDate));

queryRun       = new QueryRun(query);

queryrun包含以下内容：

SELECT DateField, CurrencyNameField, SUM(EURAmountField), SUM(USDAmountField) 
FROM MyTable(MyTable_1) GROUP BY MyTable.DateField, MyTable.CurrencyNameField 
WHERE ((DateField>={ts '2014-04-01 00:00:00.000'} 
AND DateField<={ts '2014-04-26 00:00:00.000'}))

选择日期字段、CurrencyNameField、总和（EURAmountField）、总和（USDAmountField）
根据MyTable.DateField、MyTable.CurrencyNameField从MyTable（MyTable_1）组
其中（（日期字段>={ts'2014-04-01 00:00:00.000'}
和日期字段