Question

I have 2 tables in SQL Server

TbUrl

• INDEX SPACE 12,531 MB
• ROW COUNT 247505
• DATA SPACE 1.965,891 MB

Table structure:

CREATE TABLE [TbUrl](
    [IdUrl] [Int] IDENTITY(1,1) NOT NULL,
    [IdSupply] [Int] NOT NULL,
    [Uri] [varchar](512) NOT NULL,
    [UrlCod] [varchar](256) NOT NULL,
    [Status] [Int] NOT NULL,
    [InsertionDate] [datetime] NOT NULL,
    [UpdatedDate] [datetime] NULL,
    [UpdatedIp] [varchar](15) NULL

TbUrlDetail

• INDEX SPACE 29,406 MB
• ROW COUNT 234209
• DATA SPACE 386,047 MB

Structure:

CREATE TABLE .[TbUrlDetail](
    [IdUrlDetail] [Int] IDENTITY(1,1) NOT NULL,
    [IdUri] [Int] NOT NULL,
    [Title] [varchar](512) NOT NULL,
    [Sku] [varchar](32) NOT NULL,
    [MetaKeywords] [varchar](512) NOT NULL,
    [MetaDescription] [varchar](512) NOT NULL,
    [Price] [money] NOT NULL,
    [Description] [text] NOT NULL,
    [Stock] [Bit] NOT NULL,
    [StarNumber] [Int] NOT NULL,
    [ReviewNumber] [Int] NOT NULL,
    [Category] [varchar](256) NOT NULL,
    [UrlShort] [varchar](32) NULL,
    [ReleaseDate] [datetime] NOT NULL,
    [InsertionDate] [datetime] NOT NULL

The size of TbUrl is very large compared with TbUrlDetail

The layout (design) of table TbUrl is less compared with TbUrlDetail but the data space it’s else.

I´ve done SHRINK ON DATABASE but the space of TbUrl doesn’t reduce.

What might be happening? How do I decrease the space of this table?

Answer 1

Is there a clustered index on the table? (If not you could be suffering from a lot of forward pointers – ref.) Have you made drastic changes to the data or the data types or added / dropped columns? (If you have then a lot of the space previously occupied may not be able to be re-used. One ref where changing a fixed-length col to variable does not reclaim space.)

In both cases you should be able to recover the wasted space by rebuilding the table (which will also rebuild all of the clustered indexes):

ALTER TABLE dbo.TblUrl REBUILD;

If you are on Enterprise Edition you can do this online:

ALTER TABLE dbo.TblUrl REBUILD WITH (ONLINE = ON);

Shrinking the entire database is not the magic answer here. And if there is no clustered index on this table, I strongly suggest you consider one before performing the rebuild.