Identifying Duplicates

Sep 5, 2000

Hi,
I need to delete ONLY the duplicate rows from a table..Can anyone suggest me a way to do that thing..i used the query..

"Delete from <TableName> where SlNo IN ( Select SlNo from <TableName> group
by SlNO having Count(*) > 1)"

The resultant is all the original rows also getting deleted with the duplicates..anyone please help me out..

Thank you in advance
Rani

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Identifying Duplicates In A Table

Mar 11, 2006

I need help flagging duplicate records in ome tables I have.For example if I have Table1 which conatins Field1, Field2 and Field3like belowField1 Field2 Field3 Field4Paul 18 Null NullPaul 18 Null NullJohn 19 Null NullHow would I;1. put a 'Y' in Field3 to mark the two records which are duplicates.2. put a 'Y' in Field4 to mark ONLY ONE of the duplicate records.Regards,Ciarán

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Identifying Duplicates - Find Where 2 Or More Records Have Same Rank

Sep 26, 2014

I have this query below that I created to do a count, but I don't think this is what I needed.

I need to find the duplicates. Example, if

CLI_ID1 12345 has 4 CLIP records, each CLIP record should have a different CLIP rank. I need to find scenarios where 2 (or more) of the CLIP records have the same CLIP RANK. If there are duplicate CLIP_RANKs within the same CLI_ID,

Select Distinct
cli_id1, count(clip_rank) countrank
FROM impact.dbo.CLI
LEFT JOIN impact.dbo.CLIO ON CLI.CLI_ID1 = CLIO.clio_id1

left join
impact.dbo.clip ON cli_id1 = clip_id1
Where (clio_trm = '' or clio_trm = NULL or clio_trm is null)
group by cli_id1
order by cli_id1

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Oct 22, 2014

I have a table with 22 million Business records. I can see that there are duplicates when I group by BusinessName and Address and Phone. I'd like to place only the duplicates into a table, with a ranking, oldest business key gets a ranking of 1.

As a bonus I'd like each group to have a distinct group name (although not necessary, just want to know how to do this)

Later after I run more verifications to make sure these are not referenced elsewhere I'll delete everything with a matchRank > 1 out of the main Business table.

DROP TABLE [dbo].[TestBusiness];
GO
CREATE TABLE [dbo].[TestBusiness](
[Business_pk] INT IDENTITY(1,1) NOT NULL,
[BusinessName] VARCHAR (200) NOT NULL,
[Address] VARCHAR(MAX) NOT NULL,

[code]....

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I would like to drop the ineffective indices. What I would like is a way to find if indexes are being used, preferably by object name. Is there a third party vendor that can monitor objects and how much they are used? Is there another way to do this using SQL?

Thanks in advance,

Jim

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Region_ID
Branch_ID
Customer_ID
Transaction_ID

In this regard need to create a view to reflect the info in the order

Region_ID (Ascending)
Branch_ID (Asc)
Customer_ID (Asc)
Transaction_ID (Asc)

But, at the same time, also want to include two additional columns identifying or even inserting 1's against each of the first Customer_ID considering the first two columns, and the second one on the single column itself?In other words consider the following sample, how to add 1 to the last two columns where either the Customer appears for the first time in context with the Region and Branch Fields or to be appearing on it's own for the first time:

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Customer
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Hi everybody,
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Thanx
Aby...

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Can we have the solution for the listed are two scenarios:

1. You have a normal user and do not have system privilege.
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Jun 23, 2008

I have table <contact>

I wand to higllight the duplicate student .I am considering two parameter Name and Birthdate to identify such records even though the probablity of two different student having same name and same DOB is very less.Margin for bad result is relatively low for me.


fisrtname middlename lastName birthdate
------------------------------------------------

peter jones clooney 29/06/2008
peter jones clooney 29/06/2008

both are actually same student but different from database point of view.

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Is there some way we can figure it out .

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Feb 8, 2007

I am trying to test some data handling between two different versions of an application.

I have restored the database schema twice, once as DB_old and once as DB_new.

I import a transaction using the new application into DB_new and I import the SAME transaction into the DB_old using the old version of application.

I then have to eyeball the data in SQL Query Analyzer to try to identify problems where the fields have received different values.

I have done this by running a select statement twice telling it to use both of the databases and then viewing it in two grids. There are a lot of columns so I have to do a lot of scrolling across the screen to do the comparison, and since the view is in two separate grids I have to hop back and forth and click the scroll bars, etc.

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I have no idea how to identify those individual columns with different data values or even where to start.

Just so you understand better what I am doing now here is the query I am running that I then eyeball:
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use DB_old
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Jun 4, 2007

I'm getting the following from DBCC CBECKDB (there are other errors in there, too but this is the one that concerns me at the moment):

Msg 8939, Level 16, State 42, Line 1
Table error: Object ID 1227270540, index ID 255, page (1:5359776). Test (m_slotCnt <= 1 && m_type == TEXT_TREE_PAGE) failed. Values are 8 and 1.
Msg 8944, Level 16, State 12, Line 1
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Msg 8941, Level 16, State 102, Line 1
Table error: Object ID 1227270540, index ID 255, page (1:5359778). Test (sorted [i].offset >= PAGEHEADSIZE) failed. Slot 7, offset 0x1 is invalid.
Msg 8942, Level 16, State 101, Line 1
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CHECKDB found 0 allocation errors and 4 consistency errors in table '(Object ID 1227270540)' (object ID 1227270540).

However...


select objectproperty(object_id('1227270540'),'IsTable')


...returns null. I've checked the sysobjects table for this ID, and it doesn't show up. Any ideas on how I can identify what this object is? Let me know if you want more info. This is SQL 2000, sp4, the DB is about 60GB and it's the only one on the system having issues. The issue has been around for a while (more than a month), and is consistent. I can post all of the DBCC output if you really want/need it. I was just hesitant to do so since it's so huge.

Boy, 4th day on the job and the hits just keep coming. :-) (Not complaining. I'm learning a lot!)


UPDATE: 2007.06.04_15:44 - Funny: When I ran dbcc checktable(CheckItem), I got all of the error messages displayed below, both for the mystery object ID and for the CheckItem table. I guess that's solved, but I'd still like to know if it's possible to have identified this another way, if anyone has time. Thanks.

-D.


____________________________________________________________________________________
"Believe in those who are seeking the truth. Doubt those who say they have found it." -Andre Gide

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Skol,
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1 3 20140103 17
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Fixed it by:

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DBCC Checkdb returned a bunch of errors:

Extent (3:394032) in database ID 7 is allocated by more than one allocation object. The error has been repaired.

Msg 8913, Level 16, State 1, Line 2

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Repair: Deleted off-row data column with ID 562825199616, for object ID 1076927654, index ID 1, partition ID 72057594039566336, alloc unit ID 72057594044153856 (type LOB data) on page (3:393971), slot 29.
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Msg 8945, Level 16, State 1, Line 2
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Msg 8977, Level 16, State 1, Line 2
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The error has been repaired.

[code]....

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