嵌套在LLBLGen中选择

Question

所以,我有以下表格:

使用LLBLGen 2.6(适配器版本 - No Linq),SQL Server和.NET 3.5,如何编写以下查询？

SELECT o.ObjectID 
FROM Object o 
INNER JOIN ObjectDetail d ON i.ObjectID = d.ObjectID 
WHERE d.CreatedDate = ( SELECT MAX(CreatedDate) 
                        FROM ObjectDetail
                        WHERE ObjectID = o.ObjectID
                      )

将有更多的过滤,但它与此无关,就像我有一个ObjectDetailType并且我想要特定类型的max ObjectDetail行.

此外,它不必选择o.ObjectID,任何/所有列都可以.

Answer 1

解决了它

PredicateExpression.AddWithAnd(
  new FieldCompareSetPredicate(
    ObjectDetailFields.CreatedDate,
    null,
    ObjectDetailFields.CreatedDate.SetAggregateFunction(AggregateFunction.Max),
    null,
    SetOperator.Equal,
    (ObjectFields.ObjectID == ObjectDetailsFields.ObjectID)
 )
);