为什么这个
linq查询:
(from c in Orders select new { Id=c.Id,DeliveryDate = c.DeliveryDate.Value }).Take(10)
被翻译成
SELECT TOP (10) [t1].[Id],[t1].[value] AS [DeliveryDate] FROM ( SELECT [t0].[Id],[t0].[DeliveryDate] AS [value] FROM [Orders] AS [t0] ) AS [t1]
但当我将DeliveryDate = c.DeliveryDate.Value更改为DeliveryDate = c.DeliveryDate时,SQL查询看起来很简单:
SELECT TOP (10) [t0].[Id],[t0].[DeliveryDate] FROM [Orders] AS [t0]