c# - 改进从 Entity Framework 生成的查询

Question

我有一个这样的查询 linq:

var query = from c in Context.Customers select c;
var result = query.ToList();

Linq 查询生成此 tsql 代码:

exec sp_executesql N'SELECT 
[Project1].[Id] AS [Id], 
[Project1].[Name] AS [Name], 
[Project1].[Email] AS [Email]
FROM ( SELECT 
    [Extent1].[Id] AS [Id],
    [Extent1].[Name] AS [Name], 
    [Extent1].[Email] AS [Email]
    FROM [dbo].[Customers] AS [Extent1] ) AS [Project1]

有没有办法不生成子查询？

Answer 1

您是否有任何证据表明该查询导致了性能问题？我想查询优化器会很容易地识别出这一点。

如果您在分析后确定查询是一个性能问题(有疑问) - 并且仅 那么 - 您可以简单地将查询转换为存储过程，并改为调用它。