SQL Server删除查询性能

Question

我有一个简单的表，正在评估这是从其中删除一些记录的最佳方法。

DELETE查询非常简单： DELETE FROM [dbo].[Badge] WHERE [Id_Operatore] = @SOMEVALUE

有没有办法提高此操作的性能？

这是表：

SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE TABLE [dbo].[Badge](
    [Id_Badge] [int] IDENTITY(1,1) NOT NULL,
    [Id_Operatore] [int] NULL,
    [Badge0] [smallint] NULL,
    [Badge1] [smallint] NULL,
    [Badge2] [smallint] NULL,
    [Badge3] [smallint] NULL,
    [Badge4] [smallint] NULL,
    [Badge5] [smallint] NULL,
    [Badge6] [smallint] NULL,
    [Badge7] [smallint] NULL,
    [Badge8] [smallint] NULL,
    [Badge9] [smallint] NULL,
    [Badge10] [smallint] NULL,
    [Badge11] [smallint] NULL,
    [Badge12] [smallint] NULL,
    [Badge13] [smallint] NULL,
    [Badge14] [smallint] NULL,
    [Badge15] [smallint] NULL,
    [Badge16] [smallint] NULL,
    [Badge17] [smallint] NULL,
    [Badge18] [smallint] NULL,
    [Badge19] [smallint] NULL
) ON [PRIMARY]

GO

ALTER TABLE [dbo].[Badge]  WITH CHECK ADD  CONSTRAINT [Badge_FK00] FOREIGN KEY([Id_Operatore])
REFERENCES [dbo].[Operatori] ([ID_Operatore])
ON UPDATE CASCADE
ON DELETE CASCADE
GO

ALTER TABLE [dbo].[Badge] CHECK CONSTRAINT [Badge_FK00]
GO

Answer 1

您应该在外键上添加索引。

该索引可能会涵盖所有内容，因此包括所有这些标志不是一个坏主意。

Answer 2

在[Id_Operatore]上创建聚簇（首选）或非聚簇索引。

“群集”使数据彼此保持物理状态。 这样可以减少删除时的IO。