如何在LINQ-to-SQL中编写此交叉应用查询？

Question

我有以下表格:

create table TableA (
    Id int primary key identity,
    Key int not null
)

create table TableB (
    Id int primary key identity,
    TableA_Id int not null foreign key references TableA(Id),
    Value varchar(80) not null
)

我想使用lambda表示法在LINQ-to-SQL中编写以下查询:

select TableA.Key, b.Value
from TableA
cross apply (
    select top 10 TableB.Value
    from TableB
    where TableA.Id = TableB.TableA_Id
    order by TableB.Value
) b
where TableA.Key between 0 and 999

我该怎么做？

Answer 1

这应该可以解决问题

var query = from a in context.TableA
            from b in context.TableB
                             .Where(x => x.TableA_Id == a.Id)
                             .OrderBy(x => x.Value)
                             .Take(10)
            where a.Key >= 0 && a.Key <= 999
            select new
            {
              a.Key,
              b.Value,
            };