Fuzzy Lookup / Grouping Design
Apr 7, 2008
Hi,
I need some advice on fuzzy lookup / grouping design.
I have a requirement that, I think, is between lookup and grouping transformations.
In one of our applications, users can enter manually a label for some information in the database.
Every month, I will store all the new data in our OLAP DB, and I want to group these labels with a fuzzy logic.
Historical data (already loaded) have to be grouped, as well as new data coming every month.
I have no predefined canonical data, so Fuzzy Lookup seems not adapted to my pb.
Fuzzy Grouping seems ok, but it would require to put historical data as well as new data as an input of the Fuzzy Grouping Transfo to constitute groups. This seems not efficient to me.
Any clue ?
M.D
View 1 Replies
ADVERTISEMENT
Aug 14, 2007
Dear Friends,
i think fuzzy lookup
COMPARES WHAT WE ARE MAPING THE COLUMNS WITH SPELLING (IT WILL REJECT ATLEAST 1 LETTER IS DIFFRENT IN ANY RECORD MAPPED COLUMN) EX: RAVI != REVI
what is fuzzy grouping ???? please explain
regards
koti
View 3 Replies
View Related
Mar 2, 2008
Hi All,
Is there a way the fuzzy lookup or grouping can be trained so that similarities and confidence values rely on previously matched strong links?
For example: I can link 80% of my two datasets using one strong identifier (say phone #) which I trust. My goal then, is to use the probability of matching of the rest of my linking fields (say Name,Address,Gender,DOB) in a "matched by phone number" pair to train a fuzzy lookup task to be done on the unlinked 20% of the datasets.
This "training set" would in theory influence the similarity and confidence values of the fuzzy output since each linking column would carry a different weight or contribution towards a confident match.
Does anyone out there knows how to do this in practice in SSIS?
View 1 Replies
View Related
Oct 31, 2007
We did some "at scale" fuzzy lookup tests today and were rather disappointed with the performance. I'm wanting to know your experience so I can set my performance expectations appropriately.
We were doing a fuzzy lookup against a lookup table with 25 million rows. Each row has 11 columns used in the fuzzy lookup, each between 10-100 chars. We set CopyReferenceTable=0 and MatchIndexOptions=GenerateAndPersistNewIndex and WarmCaches=true. It took about 60 minutes to build that index table, during which, dtexec got up to 4.5GB memory usage. (Is there a way to tell what % of the index table got cached in memory? Memory kept rising as each "Finished building X% of fuzzy index" progress event scrolled by all the way up to 100% progress when it peaked at 4.5GB.) The MaxMemoryUsage setting we left blank so it would use as much as possible on this 64-bit box with 16GB of memory (but only about 4GB was available for SSIS).
After it got done building the index table, it started flowing data through the pipeline. We saw the first buffer of ~9,000 rows get passed from the source to the fuzzy lookup transform. Six hours later it had not finished doing the fuzzy lookup on that first buffer!!! Running profiler showed us it was firing off lots of singelton SQL queries doing lookups as expected. So it was making progress, just very, very slowly.
We had set MinSimilarity=0.45 and Exhaustive=False. Those seemed to be reasonable settings for smaller datasets.
Does that performance seem inline with expectations? Any thoughts to improve performance?
View 4 Replies
View Related
Sep 26, 2007
I'm working with an existing package that uses the fuzzy lookup transform. The package is currently working; however, I need to add some columns to the lookup columns from the reference table that is being used.
It seems that I am hitting a memory threshold of some sort, as when I add 3 or 4 columns, the package works, but when I add 5 columns, the fuzzy lookup transform fails pre-execute:
Pre-Execute
Taking a snapshot of the reference table
Taking a snapshot of the reference table
Building Fuzzy Match Index
component "Fuzzy Lookup Existing Member" (8351) failed the pre-execute phase and returned error code 0x8007007A.
These errors occur regardless of what columns I am attempting to add to the lookup list.
I have tried setting the MaxMemoryUsage custom property of the transform to 0, and to explicit values that should be much more than enough to hold the fuzzy match index (the reference table is only about 3000 rows, and the entire table is stored in less than 2MB of disk space.
Any ideas on what else could be causing this?
View 4 Replies
View Related
Feb 16, 2007
Hi,
I am using a fuzzy lookup to cleanse data from a sales line details table, during the import process. The sales order line details contains a filed called 'reference' and this is compared to a field called 'category' in another table.
Using data viewers to check through the cleansing process, I notice that the fuzzy lookup doesn't seem to match i.e.
tbl.salesline.reference = 'I3' -> tbl.sales.category ='I03'
the above is OK, but the lookup also returns the following
tbl.salesline.reference = 'I9' -> tbl.sales.category ='I01'
The value I9 doesnt exist, and is miskeyed by user entry, and should have been 'I99'. I would have expected the fuzzy lookup to pickup the I99 value as at least two of the chrs are matching, but no, it picks the first 'I*' in the table.
If I expand the fuzzy lookup to return more results, i.e. 5 per record, then it returns the first 5 results....I01, I02 I03 and so on.
Is there a way of improving the fuzzy lookup itself?
View 1 Replies
View Related
Feb 6, 2008
The enterprise edition of SQL server includes some advanced BI features, for example the fuzzy lookup feature of IS. If the IS package lives on an enterprise edition of SQL server and the database the package it is targeting lives on a standard edition of SQL server can the advanced features be used? Can you run a fuzzy look against a database on a standard edition of SQL server when th IS package lives on an enterprise edition of SQL server? THANKS!
View 1 Replies
View Related
Jan 19, 2007
Hi Friends,
Can some body briefly explain me what is the difference between fuzzy lookup and fuzzy grouping?
thanks and regards
View 2 Replies
View Related
Oct 16, 2005
I am using the Sept CTP, I am doing a fuzzy grouping on 1.5Mil records.
View 7 Replies
View Related
Nov 14, 2007
I managed to get fuzzy grouping working. The relevant output (_key_in and _key_out) are stored in a new table that is a copy of the old table + fuzzy grouping columns.
How do i get SSIS to store the _key_in and _key_out in the original table?
The new matching column _key_out refers to the new key: _key_in. How could i get SSIS translate that to a matching column that refers to my original key?
View 1 Replies
View Related
Aug 2, 2007
hi focks,
WHAT IS THE USE OF Fuzzy Grouping IN SSIS
and please give me the example
regards
koti
View 1 Replies
View Related
May 15, 2006
Hi - we have been evaluating using Fuzzy Grouping and Lookup for maintaining our large list of customer records. Initial testing with Grouping on about 300K records went great but now with a larger sample of 7.3 million records we are running into problems. It doesn't appear to be system limitation - the index is built reasonably quickly and without errors but when it starts the matching we get these errors:
[Fuzzy Grouping Inner Data Flow : DTS.Pipeline] Error: The ProcessInput method on component "Fuzzy Lookup" (86) failed with error code 0x8000FFFF. The identified component returned an error from the ProcessInput method. The error is specific to the component, but the error is fatal and will cause the Data Flow task to stop running.
[Fuzzy Grouping Inner Data Flow : DTS.Pipeline] Error: Thread "WorkThread0" has exited with error code 0x8000FFFF.
[Fuzzy Grouping Inner Data Flow : DTS.Pipeline] Error: Thread "WorkThread1" received a shutdown signal and is terminating. The user requested a shutdown, or an error in another thread is causing the pipeline to shutdown.
[Fuzzy Grouping Inner Data Flow : OLE DB Source [1]] Error: The attempt to add a row to the Data Flow task buffer failed with error code 0xC0047020.
[Fuzzy Grouping Inner Data Flow : DTS.Pipeline] Error: Thread "WorkThread1" has exited with error code 0xC0047039.
[Fuzzy Grouping Inner Data Flow : DTS.Pipeline] Error: The PrimeOutput method on component "OLE DB Source" (1) returned error code 0xC02020C4. The component returned a failure code when the pipeline engine called PrimeOutput(). The meaning of the failure code is defined by the component, but the error is fatal and the pipeline stopped executing.
[Fuzzy Grouping Inner Data Flow : DTS.Pipeline] Error: Thread "SourceThread0" has exited with error code 0xC0047038.
One thing we did find is that our test server didn't have SP1 installed and that seemed to help a lot (we were getting buffer errors prior to SP1). One other note - the desination table is populated with all the data but no scoring has been applied to it.
Does anyone have any ideas what could be causing this?
Thanks!
Keith Doyle
View 5 Replies
View Related
May 11, 2007
Hello,
I have created a project to do de-dupification of addresses.
I understand that Fuzzy Grouping will take less time if it has lesser data volume to process.
My source feed file is sometimes huge. So I am splitting the input into multiple branches based on
the first letter of the city. There are 7 branches in the process.
Source File Feed
|
Split data into 7 groups
|
------------------------------------------------------------------------------------------------------------------------------------------
| | | | | | |
FzGrpg FzGrpg FzGrpg FzGrpg FzGrpg FzGrpg FzGrpg
| | | | | | |
Split Split Split Split Split Split Split
| | | | | | |
------------- -------------- -------------- -------------- -------------- -------------- --------------
| | | | | | | | | | | | | |
<- - - - - - - Write the Canonicals and Dupes from each of these splits into database - - - - - - - - ->
When I designed this I was hoping that each of the Fuzzy Grouping tasks will execute in parallel.
But in reality they are processing one after the other.
Is there anyway to make them execute in parallel?
Appreciate your help.
Thanks
KM
View 12 Replies
View Related
May 25, 2007
Hi,
Could someone please help!
Im doing a fuzzy lookup based on 3 fields (Surname/DOB/Gender). The only difference between the two sets of data is the case of the first letter of the Surname.
Reference table has "Stuart" Lookup has "stuart", I have set Fuzzy Lookup Input for Surname to Ignore Case but still it won't match.
The DOB/Gender are Exsactly the same.
Why does this not work? I there a work around?
Many Thanks, Deano
View 2 Replies
View Related
May 16, 2006
I am trying to run a SSIS package that contains a fuzzy lookup. I am using a flat file with about 7 million records as the input. The reference table has about 2000 records. The package fails after about 40,000 records with the following information:
------------------------
Warning: 0x8007000E at Data Flow Task, Fuzzy Lookup [228]: Not enough storage is available to complete this operation.
Warning: 0x800470E9 at Data Flow Task, DTS.Pipeline: A call to the ProcessInput method for input 229 on component "Fuzzy Lookup" (228) unexpectedly kept a reference to the buffer it was passed. The refcount on that buffer was 2 before the call, and 1 after the call returned.
Error: 0xC0047022 at Data Flow Task, DTS.Pipeline: The ProcessInput method on component "Fuzzy Lookup" (228) failed with error code 0x8007000E. The identified component returned an error from the ProcessInput method. The error is specific to the component, but the error is fatal and will cause the Data Flow task to stop running.
Error: 0xC0047021 at Data Flow Task, DTS.Pipeline: Thread "WorkThread0" has exited with error code 0x8007000E.
Error: 0xC02020C4 at Data Flow Task, Flat File Source [1]: The attempt to add a row to the Data Flow task buffer failed with error code 0xC0047020.
Error: 0xC0047039 at Data Flow Task, DTS.Pipeline: Thread "WorkThread1" received a shutdown signal and is terminating. The user requested a shutdown, or an error in another thread is causing the pipeline to shutdown.
Error: 0xC0047021 at Data Flow Task, DTS.Pipeline: Thread "WorkThread1" has exited with error code 0xC0047039.
Error: 0xC0047038 at Data Flow Task, DTS.Pipeline: The PrimeOutput method on component "Flat File Source" (1) returned error code 0xC02020C4. The component returned a failure code when the pipeline engine called PrimeOutput(). The meaning of the failure code is defined by the component, but the error is fatal and the pipeline stopped executing.
Error: 0xC0047021 at Data Flow Task, DTS.Pipeline: Thread "SourceThread0" has exited with error code 0xC0047038.
-------------------------------
I have tried many things - changing the BufferTempStoragePath path to a drive that has plenty space, changed the MaxInsertCommitSize to 5,000...
What else can I do?
Thanks!
View 10 Replies
View Related
Mar 8, 2006
Fuzzy lookup seems to be causing some problems to me. It seems to work at times and doesn't at other times. It would work a couple of times fine and give me the desired results but then without changing anything in the dataflow or the data the next few times it would not run at all and fail the pre-execute of the.
Now I'm currently getting the following error:
[Fuzzy Lookup [248]] Error: An OLE DB error has occurred. Error code: 0x80004005. An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80004005 Description: "Login timeout expired". An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80004005 Description: "An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections.". An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80004005 Description: "Named Pipes Provider: Could not open a connection to SQL Server [233]. ".
[DTS.Pipeline] Warning: A call to the ProcessInput method for input 249 on component "Fuzzy Lookup" (248) unexpectedly kept a reference to the buffer it was passed. The refcount on that buffer was 2 before the call, and 1 after the call returned.
[DTS.Pipeline] Error: The ProcessInput method on component "Fuzzy Lookup" (248) failed with error code 0xC0202009. The identified component returned an error from the ProcessInput method. The error is specific to the component, but the error is fatal and will cause the Data Flow task to stop running.
Any help would be appreciated.
View 1 Replies
View Related
Oct 18, 2006
Hi
I get the following error when I use Fuzzy Lookup in a Data Flow task with TransactionOption property set to €œRequired€?
[Fuzzy Lookup [61]] Error: An OLE DB error has occurred. Error code: 0x80004005. An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80004005 Description: "Cannot create new connection because in manual or distributed transaction mode.".
When I Change the TransactionProperty to €œSupported€? it works fine.
I need the property set to Required for it does an undo in the event of a failure.
Any ideas on how to get the Fuzzy Lookup to work
View 3 Replies
View Related
Sep 30, 2007
I have a Fuzzy Lookup in a Data Flow Task that is performing a simple text match based on a data view in SQL Server.
I keep obtaining the error below and I have no idea why. Is there a minimum number of rows required in the view in order for the lookup to work properly?
When I take the Store/Manage Index options off the lookup seems to work properly.
Thank you!
[Fuzzy Merchant Lookup [2832]] Error: SSIS Error Code DTS_E_OLEDBERROR.
An OLE DB error has occurred. Error code: 0x80040E14.
An OLE DB record is available.
Source: "Microsoft SQL Native Client"
Hresult: 0x80040E14
Description: "A .NET Framework error occurred during execution of user-defined routine or aggregate "sp_FuzzyLookupTableMaintenanceInstall": System.Data.SqlClient.SqlException: Error number 8197 is invalid. The number must be from 13000 through 2147483647 and it cannot be 50000.
System.Data.SqlClient.SqlException:
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.SqlInternalConnectionSmi.EventSink.DispatchMessages(Boolean ignoreNonFatalMessages) at Microsoft.SqlServer.Server.SmiEventSink_Default.DispatchMessages(Boolean ignoreNonFatalMessages)
at System.Data.SqlClient.SqlCommand.RunExecuteNonQuerySmi(Boolean sendToPipe)
at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe)
at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
at Microsoft.SqlServer.Dts.TxBestMatch.TableMaintenance.RaiseErrorId(SqlCommand cmd, FltmErrorMsgId MsgId, FltmErrorState State, SqlServerSeverity Severity)
at Microsoft.SqlServer.Dts.TxBestMatch.TableMaintenance.ReportErrors(SqlCommand cmd, ExceptionType Type, String ErrorMessage, FltmErrorMsgId MsgId, FltmErrorState State, SqlServerSeverity Severity, SqlErrorCollection errors)
at Microsoft.SqlServer.Dts.TxBestMatch.TableMaintenance.TranWrap(DataCleaningOperation c)
at Microsoft.SqlServer.Dts.TxBestMatch.TableMaintenance.ServerInstall(String etiTableName) .".
View 4 Replies
View Related
Aug 31, 2006
Is it possbile to have multiple fuzzy lookup within a data flow?
I need to have at least 3 fuzzy lookup in a data flow. Here're the conditions that I try to find match: 1=Zip&City, 2=Zip&State, 3=City&State. I've the first fuzzy lookup working fine. After that, I've a conditional split to get any unmatch, then use another fuzzy lookup for a second condition...at this point, I get the error saying "The package contains two objects with duplicate name of output column _Similarity..." I do not need to get the _Similarity and _Confidence, so is there a way to exclude them from returning in the output?
Any comments?
Thanks in advance.
View 4 Replies
View Related
Jun 16, 2006
Hi everyone,
Ive just started looking at the Fuzzy Lookup feature and i think i must be getting something fundamentally wrong. I have two tables - each contain different meta data representations for a set of potentially similar documents. The only chance i have of matching a document in table A to a document in table B is a common title field. However, manual input means that the titles may differ in both tables although they are potentially quite similar in most cases.
In the lookup i get to specify the output columns from table B (Reference) which is fine, but i don't seem to get to choose the columns from table A that i would also like to see. So my output shows me all the documents from table B that it thinks are similar to ones in table A...but not identifying which record it's similar to.
I initially thought that the "pass through" columns that i identified would appear in the output - but this does not seem to be the case.
I must be using it incorrectly, but i have no idea how to progress with this apart from creating a new source table (C) which is a full outer join of table A and B - and then also using table C as the reference table, but that seems madness.
any help would be appreciated - ta
Andrew
View 3 Replies
View Related
Nov 15, 2007
Hi all
I've been doing some research and running some PoCs on using the Fuzzy Lookup Transformation (FLT) and had two questions:
1) When you choose to have a maximum of 1 output returned for each input, does FLT pick this output based on the best (highest) similarity and confidence scores or the first one it finds?
2) Why does FLT not support dynamically setting properties such as ReferenceTableName or MatchIndexName?
Any help or guidance with this is greatly appreciated.
View 3 Replies
View Related
Apr 3, 2008
I created a fuzzy transformation with an input table and a reference table. When I go to the Columns tab, there are no available input or lookup columns displayed. But if I select a different reference table, sometimes it works.
Are there any specific properties a reference table must have in order for columns to show up?
Thanks,
Tom
View 5 Replies
View Related
Jul 29, 2006
Hi,
I have an Oracle table called "Party" which contains Party_Id as primary key and have Party_Name, Party_Addr etc., as fields. We have lot more duplicate party details such as (party_name and party_addr) in this table. We are trying to aviod duplicates using FUZZY logic of SSIS.
1. Is any body suggest me how to create package to avoid duplicates using Fuzzy logic for this scenario(Step by step instructions are good for me to understand SSIS).
2. Could you please provide me some samples for FUZZY(Please send me a sample to my email)
View 1 Replies
View Related
Oct 18, 2007
I was running a Fuzzy Grouping task on SQL Server Enterprise Edition SP1 without any issues. I then applied SP2 and now that same Fuzzy Grouping is causing a minidump and terminating the process.
First, does anybody know anything about this kind of issue?
Second, I tried to run the minidump file in Visual Studio but I cannot actually run the dump file in Visual Studio as I keep getting the following exception:
Debugging information for 'DtsDebugHost.exe' cannot be found or does not match. No symbols loaded.
Finally, I did obtain a random error on the server itself that displayed the GUID: 58FC39EB-9DBD-4EA7-B7B4-9404CC6ACFAB.
This GUID appears to be tied to a Dr. Watson error but, again, I cannot figure out what process is breaking.
Can somebody please help?
View 1 Replies
View Related
Oct 4, 2007
Hi,
We do not have any Address Cleansing tools and the requirement is we have to cleanse the data, finding the best possible record which has all info and update other records accordingly.
I am Not sure we can do this Fuzzy Grouping Transformation.
Example:
I have Source table with following info.
Customer_id
Location_Address
Location_City
Location_State
Location_Zip
Location_County
TT101
252 HARVARD RD
ATLANTA
GA
30340
FULTON
TT101
30340
TT101
252 HARVARD RD
ATLANTA
TT102
125TEST
CUMMING
TT102
125 TEST DR
CUMMING
GA
30040
FORSYTH
TT102
GA
30040
Please let me know the solution
Thanks in advance.
View 4 Replies
View Related
Jun 7, 2007
Hello,
I have been struggling with this for quite awhile so any help would be appreciated.
I need to know if there is away to populate the fuzzy grouping control dynamically. I know you programmatically design a package and customize it in C# but for our purposes we would like to control the SSIS package via database settings. When the settings change the package would then act different. Its a simple a package consisting of an Input - fuzzy grouping - conditional split - output. The connections are setup dynamically using parameters, expressions and a script task. Is there anyway I could do a similar thing for Fuzzy Grouping?
View 13 Replies
View Related
May 30, 2007
Hello All,
We have a SSIS package which includes Fuzzy Grouping in Data Flow. It takes two columns from source table and saves outputs in different table with match score etc. Following is the way we are doing it:
1. Load required data from table using OLEDB connection (source)
2. Sort the data
3. Apply Fuzzy grouping (using dedicated database instead tempdb and MinSimilarity = 0.6)
4. Send to destination table using OLEDB connection (destination)
In input table we have millions of records. It takes too long to execute and even sometime it fails after running 12 hours. Any suggestions for performance improvement are welcomed.
Appreciate your help.
Thanks and regards,
Ashish Basran
View 1 Replies
View Related
Nov 21, 2007
I have a few questions about the amounts of resources used by the fuzzy grouping transformation. I am running a little less than 5mil records through a fuzzy grouping that exact matches one column and fuzzy matches one. The server executing the package is a dual-core xeon with 2gb ram, running a default instance of sql 2005 enterprise.
I have been attempting to execute this package for a while now but it keeps erroring out for various reasons. At first, it was from a lack of available memory. I limited the memory usage of sql server to 256mb and set the buffer temp storage path, which alleviated those errors. However, now, my tempdb transaction log is growing significantly. It failed once for not being able to grow and reallocate quickly enough, but enlarging the auto-growth factor fixed that. Then, it filled up the volume the tempdb log was on, so now I have moved it to the san and am about to try again.
I was wondering, does anyone have a general idea on approximate resource usage by fuzzy grouping? Specifically, is there an approximate relation between the number of records grouped and the amount of ram/pagefile required? Also, on the database backend, how big can I expect the tempdb data/log files to get?
View 5 Replies
View Related
Apr 30, 2008
Hi all,
My question is how to calculate the similarity by using SQL query, example LIKE % , order by.....? Now i'm doing a function same like fuzzy grouping but i do not know how to get the answer, mean how they get match with those selected row of data.
Hope my question is clear. How to write the correct query? What should i do? I 'm newbie in Integration Services, so i need ur explaination in step by step if there hv correction.
I am looking forward to hearing from you shortly and thanks a lot in advance.
Thanks!
rgds,
xuenly
View 3 Replies
View Related
Mar 5, 2007
What is the difference between ‘Fuzzy Lookup Transformations ‘ and ‘Lookup Transformations in ssis .any real time senario for better understanding
View 1 Replies
View Related
Jul 31, 2006
I am trying to run the Fuzzy Lookup on a SQL2K ref table using 2005 SSIS package and keep getting the following error:
[Fuzzy Lookup [2601]] Error: An OLE DB error has occurred. Error code: 0x80004005. An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80004005 Description: "Cannot create a row of size 8061 which is greater than the allowable maximum of 8060.".
Regardless of the changes I make I cannot get this to work and it would make a huge difference if I could get it to run.
Can I create the FuzzyLookupIndex on a SQL2K database?
Any help or advice would be greatly appreciated.
Many thanks
C.
View 4 Replies
View Related
Apr 13, 2007
Sorry, this might be an obvious question, but I can not find anything in the documentation/forum.
I want to use a Fuzzy Lookup between 2 Oracle tables.
I select the Reference Table.
I then switch to the Columns tab, but the "Available Input Columns" and "Available Lookup Columns" lists are always empty.
I have experimented quite a bit, but to no avail. I noticed this on the Reference Table tabpage : "The table maintenance feature requires the installation of a trigger on the reference table". My guess would be that SSIS does not support Oracle for this, but I am not able to find anything in the documentation that it doesn't.
Any answer/pointer greatly appreciated.
Thanks
Jan Vandepitte
View 5 Replies
View Related
Mar 26, 2008
I have come across something on Fuzzy Lookup and dont know am I doing something wrong or is that the behaviour we are expected to get from Fuzzy Lookup.
I have a Test table as shown below with couple of sample rows.
IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[Test]') AND type in (N'U'))
DROP TABLE [dbo].[Test]
GO
CREATE TABLE [dbo].[Test](
[Code] [varchar](4) NOT NULL,
[Name] [varchar](50) NULL,
[Server] [varchar](50) NULL
) ON [PRIMARY]
GO
INSERT INTO [Test] ([Code],[Name],[Server])VALUES('PQR','CONTROL GEAR (GROUP) LTD','ELPS122')
GO
INSERT INTO [Test] ([Code],[Name],[Server])VALUES('PQR','CONTROL GEAR (GROUP)','ELPS122')
GO
IF EXISTS (SELECT * FROM sys.views WHERE object_id = OBJECT_ID(N'[dbo].[vwTest]'))
DROP VIEW [dbo].[vwTest]
GO
CREATE VIEW [dbo].[vwTest]
AS
SELECT Code, [Name]
FROM Test
GO
OLE DB Data Source - I read the data from Test Table.
Fuzzy Lookup - vwTest is used as Reference Table Name. Joined by Code & Name. Maximum No of matches to output per lookup is set to 5.
Row Count - Data Viewer between Fuzzy Lookup and RowCount
The results as shown below:
Name Name (1) _Similarity_Name
CONTROL GEAR (GROUP) LTD CONTROL GEAR (GROUP) LTD 1
CONTROL GEAR (GROUP) LTD CONTROL GEAR (GROUP) 0.6
CONTROL GEAR (GROUP) CONTROL GEAR (GROUP) 1
CONTROL GEAR (GROUP) CONTROL GEAR (GROUP) LTD 0.8
The result produced by Fuzzy Lookup has shown above.
My question is are we expected to get same similarity value or not. It doesnt produce same similarity value during my testing.
I was expecting same similarity score if I do the following two statements.
Is "CONTROL GEAR (GROUP) LTD" same as "CONTROL GEAR (GROUP)"
Is "CONTROL GEAR (GROUP)" same as "CONTROL GEAR (GROUP) LTD"
I think I know the answer, but I would like to know why though?
Thanks
Sutha
View 7 Replies
View Related
