与其内在数据相比,有一个SQL表快速增长且不一致。为了简化,有一个Windows服务备份此表中的.txt文件的内容,文件的重量从1KB到45KB左右。因此,nvarchar(max)列用于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,它给出了该表使用的字节数据总量,结果不在附近:(97231108字节)。
SELECT (SUM(DATALENGTH(A)) +
SUM(DATALENGTH(B)) +
SUM(DATALENGTH(C)) +
SUM(DATALENGTH(D)) +
SUM(DATALENGTH(E)) +
SUM(DATALENGTH(F)) +
SUM(DATALENGTH(G)) +
SUM(DATALENGTH(H)) +
SUM(DATALENGTH(I))) AS BytesUsed
FROM Files
RESULT: 97231108 bytes
此表的create语句如下:
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(DROP& CREATE),然后将旧表的数据复制到新表中,这使得表从65GB变为108MB。
我的问题是:
答案 0 :(得分:0)
安装最新的Service Pack解决了这个问题。