小编Roh*_*hit的帖子

我正在尝试优化服务器的性能，这个特定的查询导致从数据库中读取大量数据，进而导致查询超时。此查询是从 Asp.Net MVC 中的 EF6 生成的。

这是有问题的查询：

exec sp_executesql N'SELECT 
[Project1].[C1] AS [C1], 
[Project1].[Date] AS [Date], 
[Project1].[AssetID] AS [AssetID], 
[Project1].[EventData] AS [EventData]
FROM ( SELECT 
    [Extent1].[AssetID] AS [AssetID], 
    [Extent1].[Date] AS [Date], 
    [Extent1].[EventData] AS [EventData], 
    1 AS [C1]
    FROM [dbo].[Alarm] AS [Extent1]
    WHERE ([Extent1].[AssetID] IN (cast(''c6e3142e-5b1f-4a91-90d2-03a504e86ece'' as uniqueidentifier), cast(''4de25e8a-7401-49ae-bd6d-0861d67f0d2f'' as uniqueidentifier), cast(''455e3a5f-1091-4784-9964-0a1a54eaa644'' as uniqueidentifier), cast(''04b46c21-c44f-4b67-b64b-12f2764c0448'' as uniqueidentifier), cast(''a350992b-8548-4bf1-bd22-131c114a5343'' as uniqueidentifier), cast(''98ec1f36-cc54-45d2-a0e3-22aa1b669373'' as uniqueidentifier), cast(''27abcf37-2093-43d5-ae62-2e7b10fe4692'' as uniqueidentifier), cast(''c9f43598-2b9c-47b0-9230-37440e6aea54'' as uniqueidentifier), cast(''c5964caa-5c73-4c0e-bb80-4c1dc7e11039'' as uniqueidentifier), cast(''6ac30678-3876-43c9-b708-61ef19b5ea17'' as uniqueidentifier), cast(''e69d870a-87de-4e3d-b4fc-62c962489a7b'' as uniqueidentifier), cast(''a7c2f407-c605-4491-85fe-66c16fc15586'' as uniqueidentifier), …