Keyword Density/Count

Apr 16, 2007

Hi All,

let me try to explain what I'm trying to accomplish - I really hope someone
can help.

I have a table (tblArticles) which has the following:

vcrKeywords varchar(2000)
txtBody text(8000)
vcrType varchar(128)

and this is a sample of the data

vcrKeyWords || txtBody || vcrType
key1,key2,key4,key7,key9 || <snipped body|| Site5 News
key1,key3,key6,key8,key9 || <snipped body|| Site5 News
key1,key3,key4,key5,key9 || <snipped body|| Site5 News
key1,key2,key5,key7,key8 || <snipped body|| Site5 News

What I'm trying to accomplish is to return a keyword count based on the
content of vcrKeywords (i.e. each comma seperated entry as a count.

My SQL statement originally was :

SELECT vcrKeyWords, COUNT(vcrKeyWords) AS keycount FROM tblArticles
where vcrType LIKE 'site 5%' GROUP BY vcrKeyWords ORDER BY keycount DESC

However, this simply matches the entire vcrKeyword Column and not each comma
seperated value.

Is there a way in SQL that I can achieve this or do I need to use some kind
of scripting language to accomplish it...?

Regards,

Carl.

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Compensate For Keyword Density In Full Text Search

Apr 8, 2008

Hi,

When using FREETEXTTABLE the RANK returned seems to be partially based on keyword density. Has anyone come across a method of compensating for this keyword density so that good matches found in a lot of text and a small amount of text return the same RANK?

For an example look at the site I'm working on when someone searches for "whale watching" - http://www.yougodo.com/Search.aspx?ks=whale+watching - you can see that we are showing poor quality results at the top as our first sort order is based on RANK.

If we could remove the keyword density factor from RANK then this would allow second order sorting criteria to come in to play and move the more valuable results to the top.

Any help, pointers, advice would be greatly appreciated,
Gavin.

www.gavinharriss.com

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Aug 14, 2001

I am having problems w/ the indexes on a particular table. Currently the scan density if 25%. I have ran the dbcc dbreindex and the scan density does not improve. I have manually dropped and recreated all of the indexes on the table (there are only two) and still no help.

I have a clustered Primary Key index on my part_number and project_number fields and another index on the project_number field. If I drop the second index and only have my primary key index, it still doesn't help. The fill factor was originally set to 90% and I changed this to 30%, 20%, 10%, 0% and the best scan density I could acheive was 50%.

The data in this table is not updated that often, on average about 15 records a day are updated, and there are only 107 records. This is a small table, but there is a possibility for it to grow rapidly and I want to be prepared now.

Does anyone have any ideas or suggestions? I've tried everything I can think of with no luck.

TIA,

Chris

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How To Impove Scan Density

Aug 27, 2001

Case
I run dbcc showcontig
Result
DBCC SHOWCONTIG scanning 'rpRateCode' table...
Table: 'rpRateCode' (213627854); index ID: 1, database ID: 17
TABLE level scan performed.
- Pages Scanned................................: 2
- Extents Scanned..............................: 2
- Extent Switches..............................: 1
- Avg. Pages per Extent........................: 1.0
- Scan Density [Best Count:Actual Count].......: 50.00% [1:2] !!!!!!!
- Logical Scan Fragmentation ..................: 0.00%
- Extent Scan Fragmentation ...................: 50.00%
- Avg. Bytes Free per Page.....................: 3088.5
- Avg. Page Density (full).....................: 61.84%

Bellow is table structure

CREATE TABLE [dbo].[rpRateCode] (
[ID_RateCode] [ID] NOT NULL ,
[ID_ScheduleOfPresence] [ID] NULL ,
[ID_ScheduleOfBilling] [ID] NULL ,
[IsExtensible] [bit] NOT NULL ,
[IsFixedRate] [Boolean] NOT NULL ,
[ID_RateCodeFollow] [ID] NULL ,
[ID_RateDef] [ID] NULL ,
[ID_MarketSegment] [ID] NOT NULL ,
[ID_HskLevelPattern] [ID] NULL ,
[ComplimentaryType] [AType] NULL ,
[BillingType] [AType] NULL ,
[Discriminator] [Discriminator] NOT NULL ,
[PrintRateOnConfirm] [Boolean] NOT NULL ,
[PrintRateOnArrivalList] [Boolean] NOT NULL ,
[PrintRateOnRegCard] [Boolean] NOT NULL ,
[MinNights] [NbOfNights] NULL ,
[MaxNights] [NbOfNights] NULL ,
[IsLimited] [Boolean] NULL ,
[presencetype] [tinyint] NULL ,
[RateNote] [varchar] (60) NULL ,
[IsAgeCatDiffRoom] [Boolean] NULL ,
[ID_Currency] [ID] NULL
) ON [PRIMARY]
GO

ALTER TABLE [dbo].[rpRateCode] WITH NOCHECK ADD
CONSTRAINT [PK__rpRateCode__2EBAFAC0] PRIMARY KEY CLUSTERED
(
[ID_RateCode]
) ON [PRIMARY]
GO

My question how to increase Scan Density for this table if CLUSTERED index exist?

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Dec 16, 2005

Can someone explain why i can drop and recreate indexes on say 2 tables and they had a scan densitiy of say 15% and 10%.

After i recreate the indexes on both tables one comes back with a scan density of 100% and the other only 25%.

What would cause this table to only go to 25% and not 100% like i want it to be?

Thanks for your help :)

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Dec 5, 2000

I ran a DBCC Showcontig (tableid) and it tell me that one of my tables is only putting 0.19% data on each page. How can I control this for more data on a page. It tells me that I have 8078.8 bytes free per page.

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Oct 23, 1999

A few days after droping and recreating noclustered indexes on a large table, scan density of most indexes falls below 20%. Only a few number of rows has deleted. Update operation didn't update these keys and there was a lot of inserts. Could anyone explain why are indexes fragmented so much?

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Aug 16, 2004

I have attached a DBCC ShowContig for a table that has a less than 50% scan density value.

I vendor in insistent I have run their scripts incorrectly three times. I have run a "dbcc reindex" and even dropped primary key and indexes for a table and the scan density does not change. I have read white papers that state that on small tables you may never get a scan density of 100%. I am using this forum as a yardstick for this question.

Thanks

Table: 'ACCESSPROFPERM' (859150106); index ID: 1, database ID: 8
TABLE level scan performed.
- Pages Scanned................................: 4
- Extents Scanned..............................: 2
- Extent Switches..............................: 1
- Avg. Pages per Extent........................: 2.0
- Scan Density [Best Count:Actual Count].......: 50.00% [1:2]
- Logical Scan Fragmentation ..................: 0.00%
- Extent Scan Fragmentation ...................: 50.00%
- Avg. Bytes Free per Page.....................: 709.5
- Avg. Page Density (full).....................: 91.23%

DBCC SHOWCONTIG scanning 'ACCESSPROFPERM' table...
Table: 'ACCESSPROFPERM' (859150106); index ID: 2, database ID: 8
LEAF level scan performed.
- Pages Scanned................................: 4
- Extents Scanned..............................: 4
- Extent Switches..............................: 3
- Avg. Pages per Extent........................: 1.0
- Scan Density [Best Count:Actual Count].......: 25.00% [1:4]
- Logical Scan Fragmentation ..................: 0.00%
- Extent Scan Fragmentation ...................: 75.00%
- Avg. Bytes Free per Page.....................: 2013.0
- Avg. Page Density (full).....................: 75.13%
DBCC SHOWCONTIG scanning 'ACCESSPROFPERM' table...
Table: 'ACCESSPROFPERM' (859150106); index ID: 3, database ID: 8
LEAF level scan performed.
- Pages Scanned................................: 3
- Extents Scanned..............................: 3
- Extent Switches..............................: 2
- Avg. Pages per Extent........................: 1.0
- Scan Density [Best Count:Actual Count].......: 33.33% [1:3]
- Logical Scan Fragmentation ..................: 0.00%
- Extent Scan Fragmentation ...................: 66.67%
- Avg. Bytes Free per Page.....................: 1723.3
- Avg. Page Density (full).....................: 78.71%

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Aug 29, 2007

Hi All,

I have the following table "Project"

-------------------------------------------------------------------------------------------
ID Name Start Date End Date
--------------------------------------------------------------------------------------------
001 Project 1 2-2-2003 2-3-2007
002 Project 2 1-24-2003 2-6-2007
003 Project 3 4-10-2005 2-10-2008
004 Project 4 5-20-2006 6-6-2008
...
015 Project 15 2-20-2006 3-3-2009
----------------------------------------------------------------------------------------------
What I want is the the following output.

Output 1:

------------------------------------------------------------------------------------------------------------------------------------------------
Year Projects No. Of Projects Starting Months
------------------------------------------------------------------------------------------------------------------------------------------------
2003 Project 1 , Project 2 2 February, January
2005 Project 3 1 April
2006 Project 4, Project 15 2 May , Feb
------------------------------------------------------------------------------------------------------------------------------------------------

(the order displayed in the months shoudl be in accordance with the order of the projecs in the projects column...)
and also the following

Output 2: (this is optional view...)
-----------------------------------------------------------------------------------------
Year Start Date Project Name
-----------------------------------------------------------------------------------------
2003


February 2 Project 1
January 24 Project 2
2005
April 4 Project 3
2006
May 5 Project 4
February 20 Project 15
-------------------------------------------------------------------------------------------

I am very much in need of Output 1. Could someone help me,




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With the function below, I receive this error:Error:Transaction count after EXECUTE indicates that a COMMIT or ROLLBACK TRANSACTION statement is missing. Previous count = 1, current count = 0.Function:Public Shared Function DeleteMesssages(ByVal UserID As String, ByVal MessageIDs As List(Of String)) As Boolean        Dim bSuccess As Boolean        Dim MyConnection As SqlConnection = GetConnection()        Dim cmd As New SqlCommand("", MyConnection)        Dim i As Integer        Dim fBeginTransCalled As Boolean = False
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May 22, 2008

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May 25, 2015

below data,

Countery
parentid
CustomerSkId
sales

A
29097
29097
10

A
29465
29465
30

A
30492
30492
40

[code]....
 
Output

Countery
parentCount

A
8

B
3

c
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in my count function,my code look like,

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set custdimensionfilter as {custdimensionmemb1,custdimensionmemb2,custdimensionmemb3,custdimensionmemb4}
set finalset as exists(salest,custdimensionfilter,"Sales")
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