我正在尝试提高运行速度非常慢的查询的性能。经过实际执行计划后;我发现聚集索引搜索占用了 82%。有什么方法可以提高Index Seek的性能吗?
指数:
/****** Object: Index [IX_Stu] Script Date: 12/28/2009 11:11:43 ******/
CREATE CLUSTERED INDEX [IX_Stu] ON [dbo].[stu]
(
[StuKey] ASC
)WITH (PAD_INDEX = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, IGNORE_DUP_KEY = OFF, ONLINE = OFF) ON [PRIMARY]
表(为简洁省略了一些列):
CREATE TABLE [dbo].[stu](
[StuCertKey] [int] IDENTITY(1,1) NOT NULL,
[StuKey] [int] NULL
CONSTRAINT [PK_Stu] PRIMARY KEY NONCLUSTERED
(
[StuCertKey] ASC
)WITH (PAD_INDEX = OFF, IGNORE_DUP_KEY = OFF, FILLFACTOR = 80) ON [PRIMARY]
) ON [PRIMARY]