我有一张具有以下结构的表,如您所见,有一个聚集索引和两个非聚集索引,一个非聚集索引是 IX_ParentId_Include,另一个是 FLIX_ParentId_Include
除了第二个索引被过滤之外,它们是相同的。
CREATE TABLE [dbo].[PhotoRepo] (
[PhotoRepoId] INT IDENTITY (1, 1) NOT FOR REPLICATION NOT NULL,
[TypeId] TINYINT NULL,
[ParentId] INT NULL,
[RemoteLocation] VARCHAR (4000) NOT NULL,
[UploadedAt] DATETIME NOT NULL,
[UploadedBy] VARCHAR (255) NULL,
[FileSize] INT NOT NULL,
[DefaultChild] BIT NOT NULL,
[RemoteLocationUploadedAt] DATETIME NULL,
CONSTRAINT [PK_FileList] PRIMARY KEY NONCLUSTERED ([PhotoRepoId] ASC)
);
GO
CREATE CLUSTERED INDEX [IX_PhotoRepoId]
ON [dbo].[PhotoRepo]([PhotoRepoId] ASC);
GO
CREATE NONCLUSTERED INDEX [IX_ParentId_Include]
ON [dbo].[PhotoRepo]([ParentId] ASC)
INCLUDE([RemoteLocation], [DefaultChild], [TypeId]);
GO
CREATE NONCLUSTERED INDEX [FLIX_ParentId_Include] …
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