SQL表增长不一致

有一个SQL表，它的增长速度很快，与它的内在数据相比不一致。简而言之，有一个windows服务备份此表中.txt文件的内容，文件的重量约为1KB到45KB。因此，使用nvarchar（max）列存储这些文本文件的内容

在此表上运行sp_spaceused命令时，结果如下：

name    rows    reserved       data      index_size   unused
Files   20402   814872 KB    813416 KB     1048 KB     408 KB

但是，当运行这个简单的查询时（该查询以字节为单位给出此表使用的数据总量），结果并不接近：（97231108字节）

此表的create语句如下所示：

CREATE TABLE [dbo].[Files](
    [A] [int] IDENTITY(33515427,1) NOT NULL,
    [B] [nvarchar](100) NOT NULL,
    [C] [nvarchar](max) NOT NULL,  
    [D] [nvarchar](100) NOT NULL,
    [E] [datetime] NULL,
    [F] [nvarchar](2) NULL,
    [G] [datetime] NULL,
    [H] [nvarchar](100) NULL,
    [I] [int] NULL,

    CONSTRAINT [PK_Files] PRIMARY KEY CLUSTERED 
    (
    [A] ASC
    )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF,
    ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY],
    CONSTRAINT [UK_Files_FileType_FileDate] UNIQUE NONCLUSTERED 
    (
    [D] ASC,
    [E] ASC
            )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF,                           
            ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
        ) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]

    GO

    ALTER TABLE [dbo].[Files]  WITH CHECK ADD  CONSTRAINT [FK_Files_FileStatus] FOREIGN   
    KEY([F])
    REFERENCES [dbo].[F] ([F])
    GO

    ALTER TABLE [dbo].[Files] CHECK CONSTRAINT [FK_Files_FileStatus]
    GO

临时修复：我重新创建了表（拖放和创建），然后将旧表的数据复制到新表中，这使表从65GB变为108MB

我的问题是:

• 是什么让这张桌子占了这么多空间？我怎样才能防止它再次增长

---

安装最新的service pack修复了该问题

CREATE TABLE [dbo].[Files](
    [A] [int] IDENTITY(33515427,1) NOT NULL,
    [B] [nvarchar](100) NOT NULL,
    [C] [nvarchar](max) NOT NULL,  
    [D] [nvarchar](100) NOT NULL,
    [E] [datetime] NULL,
    [F] [nvarchar](2) NULL,
    [G] [datetime] NULL,
    [H] [nvarchar](100) NULL,
    [I] [int] NULL,

    CONSTRAINT [PK_Files] PRIMARY KEY CLUSTERED 
    (
    [A] ASC
    )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF,
    ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY],
    CONSTRAINT [UK_Files_FileType_FileDate] UNIQUE NONCLUSTERED 
    (
    [D] ASC,
    [E] ASC
            )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF,                           
            ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
        ) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]

    GO

    ALTER TABLE [dbo].[Files]  WITH CHECK ADD  CONSTRAINT [FK_Files_FileStatus] FOREIGN   
    KEY([F])
    REFERENCES [dbo].[F] ([F])
    GO

    ALTER TABLE [dbo].[Files] CHECK CONSTRAINT [FK_Files_FileStatus]
    GO