Transact SQL :: Removal And Deletion Of Duplicate Records In Table

Nov 15, 2015

I have this table:

id | Name | Age
==================
1 | AAA | 22
1 | AAA | 22
2 | BBB | 33
2 | BBB | 33
2 | BBB | 33
3 | CCC | 44
4 | DDD | 55

I need to delete from this table all the duplicate records and leave only one record. The table will looks like this:

id | Name | Age
==================
1 | AAA | 22
2 | BBB | 33
3 | CCC | 44
4 | DDD | 55

I work with sqlCE for Mobile...

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Duplicate Removal And Intelligent T-SQL

Jul 20, 2005

I am looking for some T_SQL code that would help us eliminateduplicate data entry into our mailing db. Finding and removing theexisting dups is not rocket science, but I am looking for a completesolution.We also want to be able to come up with a T-SQL script to beintelligent enough to know if:"Bill Jones" is the same as "Billy Jones" or"Bill Jones" is the same as "William Jones" or"Bill Jones at 123 My street" is the same as "Bill Jones at 123 MySt."Purchasing scripts from a company is not out of the question. Its amatter of script cost versus my hourly rate to create them... Needlessto say, something cheap.We have only heard of one app that is dynamic enough to handle this,and the cost was way, way out of our range, 6 figures is almost 2years salary.Any ideas would be greatly appreciated.

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Nov 18, 2015

How can I prevent duplicate records in the query

With
Property AS
(
SELECT
*
FROM dbo.MulkiyetBase
),
Document AS
(
SELECT

[code]....

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Dec 3, 2010

I have a table that "Geography" that has the following columns: city, state, zip

There are tons of duplicate cities in this table. I ran this query and it shows me the number of occurrences of each city. I want to delete all the duplicates except for 1. I don't want to do this manually as there are a lot of records.

What would the SQL look like to delete the duplicate records but keep at least one?

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Jul 28, 2015

I have a requirement where i want to delete the records based on the Date column. I have table which contain the columns like machinename ,lasthardwarescandate

I want to delete the records based on the max(Lasthardwarescandate) i.e. latest one, column where the machine name is duplicate menace it repeats. So how would i remove the duplicate machine names based on the Lasthardwarescandate column(There are multiple entries for the Lasthardwarescandate so i want to fetch the latest date column).

Note: Duplication should be removed based on “Last Hardware Scan” date.

Only latest date should be considered from multiple records for the same system. "

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Deletion Of Duplicate Row

Jul 23, 2005

Hi Everyone,I have a table in which their is record which is exactly same.I want to delete all the duplicate keeping ony 1 record in a table.ExampleTable AEmpid currentmonth PreviousmonthSupplimentarydays basic158 2001-11-25 00:00:00.000 2001-10-01 00:00:00.000 2.004701.00158 2001-11-25 00:00:00.000 2001-10-01 00:00:00.000 2.004701.00158 2001-11-25 00:00:00.000 2001-10-01 00:00:00.000 2.004701.00I want to delete 2 rows of above table.How can I achieve that.Any suggestion how can i do that.Thank you in advanceRichard

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Jun 11, 2007

hi,

i am trying to delete rows where a particular column (hours) has the same value for the same member (primary key) but where the effective dates are different. i want to delete the duplicate(s) rows which have the most recent effective date(s).

can you help?

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Nov 17, 2000

I have a table...say tb1 of 20 columns which has 2.7 million rows. There is no PK and the only way of identifying a unique row can be done with combination of column1+column2+column3.
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ITS VERY URGENT....Thanks in advance.

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Page 2 - Deletion Of Duplicate Values

Jun 11, 2007

Quote: Originally Posted by achoudry ps i am using sqlserver well, whaddya know, eh

do you realize you posted in the mysql forum?

i'm gonna move this thread to the sql server forum

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Oct 21, 2015

I am trying to write a query that will retrieve all students of a particular class and also any rows in HomeworkLogLine if they exist (but return null if there is no row). I thought this should be a relatively simple LEFT join but I've tried every possible combination of joins but it's not working.

SELECT
Student.StudentSurname + ', ' + Student.StudentForename AS Fullname,
HomeworkLogLine.HomeworkLogLineTimestamp,
HomeworkLog.HomeworkLogDescription,
ROW_NUMBER() OVER (PARTITION BY HomeworkLogLine.HomeworkLogLineStudentID ORDER BY

[Code] ...

It's only returning two rows (the students where they have a row in the HomeworkLogLine table).

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Oct 5, 2007

How do i remove duplicate records from a table with a single query without using cursors or anything like that.Sample :tempCol11221P.S The table has only one column

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Aug 14, 2015

I'm looking to dynamically remove records from tables dynamically using the information schema within SQL Server. Looking to remove records from all the tables within a schema. I have gotten as far as generating the script dynamically then using a while exist clause to execute the delete statements.

DECLARE@TargetSchema varchar(100),
--@LibNameData varchar(100),
@fnameIndex varchar(100),
--@startOFR_SCR_FILENAME_DATE varchar(25),

[code]...

Would like to execute the statements generated by the results from the information schema.

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Oct 5, 2007

Hello friends,
I have a one problem, i have a table in that some reocrds are duplicate.i want to find which records are duplicate.
for exp. my table is as follows
emp_id              emp_name
1                          aa
2                          bb
3                          cc
1                          aa
3                          cc
3                          cc
and i want the result is like
emp_id              emp_name
1                       aa
1                       aa
3                       cc
3                       cc
3                       cc

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Nov 29, 2004

Hello All,

Please show me how to delete duplicate records from a table.

Thanks in Advance

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Feb 9, 2012

I have a table that has duplicate records with the exception of the ID and I am trying to write a while loop that would go through the table, locate all duplicate records based on a field called LASTNAME.

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May 16, 2008

Hello,

I need some help on this.
I want to retrieve all the duplicate records from a particulat column.
For eg suppose i have a table named testtable

columns in the table : item_id,ref_no,title,address

now i need to check if there are any duplicate entries in the ref_no column and if there are any retrieve the records.

Gaurish Salunke
Software Developer
OPSPL

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Jul 20, 2005

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Apr 3, 2008

Hi Guyz

say i have a table

10011 NULL NULL Classical NULL
10011 NULL NULL Classical NULL
10004 NULL NULL Classical NULL
10004 NULL NULL Classical NULL
10004 NULL NULL Classical NULL
10005 NULL NULL Classical NULL

i want to eliminate the duplicate records and atable should look like

10011 NULL NULL Classical NULL
10004 NULL NULL Classical NULL
10005 NULL NULL Classical NULL

do we have any simple sql to do it or something complex.
thanks in advance !

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Jul 6, 2006

I loaded one table via SSIS and found that it contained many duplicate records (from the input source). I can create a SQL task to delete them, but I wonder if SSIS offers and task "out of the box" to delete dups?

TAI,

barkingdog

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Mar 4, 2008

Hello Frnds....Can anybody give the answer of this question as How to Delete duplicate records from Table ?
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EntryID -- ID -- timein -- timeoff
1487 11 2015-05-05 16:33:23 2015-05-05 18:45:26
1623 11 2015-05-05 16:33:23 2015-05-05 18:45:26

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Jun 2, 2015

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Student_name
_____________
Rocky
Albert
Rocky
Williams
Albert
Robert

The query will show

Student_name
______________
Rocky
Rocky
Albert
Albert

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Jul 21, 2015

I have a table with more than 1000 records. The columns look like this

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Some of the rows are duplicates except for the fact that they have different values for the first column alone (import id)

11111      test   21-07-2015   xxxxxx   yyyyyy
22222      test   21-07-2015   xxxxxx   yyyyyy

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May 14, 2015

i am having three tables

test
testId testName totalQuestion

Questions

QuestionId fktestId QuestionName

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if not EXISTS(SELECT testName from tblTest WHERE UPPER(@testName) = UPPER(@testName))
BEGIN
INSERT INTO tblTest SELECT @userId, testName,duration,totalQuestion,termsCondition,0,GETUTCDATE(),GETUTCDATE() from tblTest WHERE id=@testId
SET @insertedTestId=@@identity
INSERT INTO tblTestQuestion SELECT @insertedTestId,question,0,GETUTCDATE(),GETUTCDATE() from tblTestQuestion WHERE testId=@testId
END

how to insert in answer table as one question can be multiple answers.

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May 12, 2004

Ladys, Gentlement, I have table that grows anywhere from 200,000 to 1,000,000 records perday. Besides that I need to keep at least 6 months historical data from this same table. The transaction log was purged after each batch when testing data monthly. I'm looking for some way of deleting just one day's data if it meets a criteria. It must remain within the 6 months period of historical data. This is what I've come up with so far"

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If it meets this criteria I can change the select to a delete? Please Let me know what you think

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Oct 14, 2015

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A_ID name id
1 sam 10
2 sam 10
3 sam 10
4 sam 10
5 ccc 15
6 ccc 15
7 ccc 15
8 fff 20
9 fff 20
10 fff 20

So now I have duplicates values in id column so now I need to take only one value of each and delete the remaining. I need to take first id value 10,15,20 so only 3 rows should be there in my table.

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Aug 18, 2007

Hi I am not sure if I am at right place, anyhow I hope I am :) Now the question: I am using an ASP.net Application with SQL-Server. I want to make a page so that it set the expiration time (date) for certain record and once that time reaches, it deletes those records, or make any updates to the record (what ever applicable). I also want to control this auto deletion from my application, means that turn this On/Off whenever needed. I am not sure how to start this. I was told by a friend that I need to use triggers from SQL-server but I need some help. Can anyone help me out on this? RegardsMykhan

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Sep 16, 2006

Hello All,

I have been involved in a project wherein i have to delete old records from two table and the corresponding child records from the interlinked tables.
I try to find a SQL Procedure that deletes the child records, but that procedure uses the sysforeignkeys table for recursively deleting the child records.
When i looked at my sysoreignkeys table, it was empty(no rows).
Request you all if you can provide me the SQL Procedure that can delete record in the table with the child records.

Thanks in advance

Regards,
Manoj Kumar

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Jun 30, 2015

I have a temp table with the following columns and data

drop table #temp
create table #temp (id int,DLR_ID int,KPI_ID int,Brnd_ID int)
insert into #temp values (1,2343,34,2)
insert into #temp values (2,2343,34,2)
insert into #temp values (3,2343,34,2)

[Code]....

I use the rank function on that table and get the following results

select rank() over (order by DLR_ID,KPI_ID,BRND_ID ) Rown,* from #temp

I am interested only in Rown and Id columns. For each Rown number, I need to get the min(ID) in the second column and the duplicate ID should be in 3rd column as shown below.If i have 3 duplicate IDs , I should have 3 rows with 2nd column being the min(id) and 3rd column having one of the duplicate ids in ascending order(as shown in Rown=6)

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SqlException: Cannot get the data of the row from the OLE DB provider "SQLNCLI" for linked server "sqlcdsclustersqlcds".

OLE DB provider "SQLNCLI" for linked server "sqlcdsclustersqlcds" returned message "Row handle referred to a deleted row or a row marked for deletion.".

Here is the definition of the stored proc:

CREATE PROC [dbo].[usp_MobileAppOnClick_InsertNoCabsTranData_Log]
(
@CustomerMobileNo VARCHAR(40),
@City VARCHAR(50) = '',
@PickUpLat REAL,
@PickUpLng REAL,
@NextAvailableSlot_Meru VARCHAR(20),

[Code] ....

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Mar 25, 2008

Hi,
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Thanx in Advance

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