Deleteing Duplicate Records From My Table

Jul 20, 2005

I just discovered that all my records appear twice inside my table, in
other words, they repeat on the row below. How can I delete all of the
duplicates? I'm sure there must be a tidy line of sql to do that.

Thanks,

Bill

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Deleteing Millions Records From A Table-faster Way?

Jun 21, 2007

hi!
i am using sql 2005 k with sp1.

I want to delete 30-40 million rows from a transactional table. Whats the fastest way to delete these rows. just to delete 300,000 rows it takes 30 min. also i don't want to truncate the table.

any help would be appreciated

Thanks

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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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Find Duplicate Records In Table

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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How To Delete Duplicate Records From A Table

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

I uploaded some data about 2 or 3 times and it keep appending it to thetable.Now I want to keep only first duplicate and delete rest of.Suppose part number 123 has been added 3 times so I want to keep only 1record.Thanks

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How To Eliminate The Duplicate Records In A Table ?

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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Deleting Duplicate Records From A Table.....

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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How To Delete Duplicate Records From Table ?

Mar 4, 2008

Hello Frnds....Can anybody give the answer of this question as How to Delete duplicate records from Table ?
I Know that with check option and also with Unique Constraint we can avoid to enter duplicate records in table but How to delete from table which does not have any constraints ?

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T-SQL (SS2K8) :: Identifying Potential Duplicate Records In A Given Table?

Oct 8, 2015

any useful SQL Queries that might be used to identify lists of potential duplicate records in a table?

For example I have Client Database that includes a table dbo.Clients. This table contains various columns which could be used to identify possible duplicate records, such as Surname | Forenames | DateOfBirth | NINumber | PostalCode etc. . The data contained in these columns is not always exactly the same due to differences caused by user data entry; so some records may have missing data from some of the columns and there could be spelling differences too. Like the following examples:

1 | Smith | John Raymond | NULL | NI990946B | SW12 8TQ
2 | Smith | John | 06/03/1967 | NULL | SW12 8TQ
3 | Smith | Jon Raymond | 06/03/1967 | NI 99 09 46 B | SW12 8TQ

The problem is that whilst it is easy for a human being to review these 3 entries and conclude that they are most likely the same Client entered in to the database 3 times; I cannot find a reliable way of identifying them using a SQL Query.

I've considered using some sort of concatenation to a new column, minus white space and then using a "WHERE column_name LIKE pattern" query, but so far I can't get anything to work well enough. Fuzzy Logic maybe?

the results would produce a grid something like this for the example above:

ID | Surname | Forenames | DuplicateID | DupSurname | DupForenames
1 | Smith | John Raymond | 2 | Smith | John
1 | Smith | John Raymond | 3 | Smith | Jon Raymond
9 | Brown | Peter David | 343 | Brown | Pete D
next batch of duplicates etc etc . . . .

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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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CREATE TABLE DUPLICATE OBJECT/DUPLICATE FIELD NAME ERROR Msg 2714

Oct 2, 2007

Hello Everyone:

I am using the Import/Export wizard to import data from an ODBC data source. This can only be done from a query to specify the data to transfer.

When I try to create the tables, for the query, I am getting the following error:




Msg 2714, Level 16, State 4, Line 12

There is already an object named 'UserID' in the database.

Msg 1750, Level 16, State 0, Line 12

Could not create constraint. See previous errors.


I have duplicated this error with the following script:


USE [testing]

IF OBJECT_ID ('[testing].[dbo].[users1]', 'U') IS NOT NULL

DROP TABLE [testing].[dbo].[users1]

CREATE TABLE [testing].[dbo].[users1] (

[UserID] bigint NOT NULL,

[Name] nvarchar(25) NULL,

CONSTRAINT [UserID] PRIMARY KEY (UserID)

)

IF OBJECT_ID ('[testing].[dbo].[users2]', 'U') IS NOT NULL

DROP TABLE [testing].[dbo].[users2]

CREATE TABLE [testing].[dbo].[users2] (

[UserID] bigint NOT NULL,

[Name] nvarchar(25) NULL,

CONSTRAINT [UserID] PRIMARY KEY (UserID)

)

IF OBJECT_ID ('[testing].[dbo].[users3]', 'U') IS NOT NULL

DROP TABLE [testing].[dbo].[users3]

CREATE TABLE [testing].[dbo].[users3] (

[UserID] bigint NOT NULL,

[Name] nvarchar(25) NULL,

CONSTRAINT [UserID] PRIMARY KEY (UserID)

)



I have searched the "2714 duplicate error msg," but have found references to duplicate table names, rather than multiple field names or column name duplicate errors, within a database.

I think that the schema is only allowing a single UserID primary key.

How do I fix this?

TIA

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Jan 18, 2000

Is there a way to find duplicate records in a table using code. We have about 500,000 records in this table.
Thanks.

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Jan 27, 2005

Hi All,

How to check for the duplicate records in the table? Thanks.

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Jun 12, 2002

Yes, I know this subject has been exhausted, but I need help in locating the discussion which took place a few months ago.
Sharon relayed to the group a piece of software (expensive) which would help in my particular situation. I grabbed a demo and have gotten the approval for purchase. Unfortunately, I don't have the thread with me at work.

The problem:

Number Fname Lname Age ID
123 John Franklin 43 1
123 Jane Franklin 40 2
123 Jeff Franklin 12 3
124 Jean Simmons 39 4
125 Gary Bender 37 5
126 Fred Johnson 29 6
126 Fred Johnson 39 7
127 Gene Simmons 47 8

The idea would be to get only unique records from the Number column. I don't care about which information I grab from the other columns, but I must have those fields included.
If my resultant result set looked as follows, that would be fine. Or any other way, as long as all of the fields had information and there were only unique values in the Number field.

Number Fname Lname Age ID
123 Jeff Franklin 12 3
124 Jean Simmons 39 4
125 Gary Bender 37 5
126 Fred Johnson 39 7
127 Gene Simmons 47 8

If anyone remembers this discussion, mainly the date, I would really appreciate it.

Thanks

Gregory Taylor
MIS Director
Timeshares By Owner

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Jul 13, 2007

Hi,

I have a field called user_no

i want to find out which ones are duplicates in the user_no field

the data in user_no is like this

111-222-345-666

so there are 10,000 records in the table and i want to find out the duplicate records in them

can someone tell me how my query will be

todd

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Feb 17, 2008

I have two tables, one contains all work orders, the second contains records on work orders that are linked to customoer orders. I'm trying to create a query that will return specific fields from the table that contains orders in the linked order table, and only the work orders in the all order table that (work_order) do not exist in the linked order table (demand_supply_link). I have tried several queries and cannot get the results I desire. Here is the query I am currently trying.

SELECT DISTINCT WORK_ORDER.DESIRED_WANT_DATE as 'Want Date', DEMAND_SUPPLY_LINK.SUPPLY_BASE_ID as 'WO Id',
WORK_ORDER.DESIRED_QTY as 'End Qty', DEMAND_SUPPLY_LINK.SUPPLY_PART_ID as 'Part Id', CUST_ORDER_LINE.CUSTOMER_PART_ID as 'Cust Part',
OPERATION.RESOURCE_ID as Resource, PART.DESCRIPTION as Description, CUSTOMER.NAME as Name
FROM ((((DEMAND_SUPPLY_LINK INNER JOIN CUST_ORDER_LINE ON DEMAND_SUPPLY_LINK.DEMAND_BASE_ID = CUST_ORDER_LINE.CUST_ORDER_ID)
INNER JOIN WORK_ORDER ON DEMAND_SUPPLY_LINK.SUPPLY_BASE_ID = WORK_ORDER.BASE_ID)
INNER JOIN OPERATION ON WORK_ORDER.BASE_ID = OPERATION.WORKORDER_BASE_ID) INNER JOIN PART ON WORK_ORDER.PART_ID = PART.ID)
INNER JOIN (CUSTOMER INNER JOIN CUSTOMER_ORDER ON CUSTOMER.ID = CUSTOMER_ORDER.CUSTOMER_ID) ON CUST_ORDER_LINE.CUST_ORDER_ID = CUSTOMER_ORDER.ID
WHERE WORK_ORDER.DESIRED_WANT_DATE Is Not Null AND OPERATION.RESOURCE_ID in ('ASSY','FAB 1','PLAY TRK')
AND WORK_ORDER.STATUS='R'

UNION
SELECT distinct work_order.desired_want_date as 'Want Date', work_order.BASE_id as 'WO Id',
work_order.desired_qty as 'End Qty', work_order.part_id as 'Part Id', operation.resource_id as Resource,
part.description as Description
FROM WORK_ORDER INNER JOIN PART ON PART_ID=WORK_ORDER.PART_ID INNER JOIN OPERATION ON WORK_ORDER.BASE_ID=OPERATION.WORKORDER_BASE_ID
WHERE WORK_ORDER.DESIRED_WANT_DATE IS NOT NULL AND OPERATION.RESOURCE_ID IN ('ASSY','FAB 1', 'PLAY TRK')
AND WORK_ORDER.STATUS='R'

This is the error I receive:
Server: Msg 205, Level 16, State 1, Line 1
All queries in an SQL statement containing a UNION operator must have an equal number of expressions in their target lists.

The all orders table (work_order) will not have the other fields to link to as there is no customer order linked to them.

Can anyone help. Thanks!

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Feb 9, 2004

Hi

Can anyone tell me how to stop a SQL query displaying duplicate records within a table

Thanks Alot

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Apr 7, 2004

Can someone tell me the best procedure when trying to find duplicate records within a table(s)?

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If someone can tell me how to perform this procedure I would apprciate it. And if you reply can also include examples that i could follow for my records.

Thanks for the help?

-SQL Rookie

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Hi,

Not so sure how simple this question is but here is what happened. I installed SQL Server 2005 on a new Win Server 2003. I exported the tables and their data from the old machine to the newly established database on the new machine.

It looks like all my records were duplicated. When I try to delete one of the duplicates it won't work because both rows are effected. I can't set my primary key now and if I try to create a new database with the primary key already set than the import fails.

Any one run into this before or know what's going on?

Any help ASAP would really be appreciated.

Thanks,

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Hello all.

I am using the following statement to establish which rows have duplicate information using the following statement:


SELECT EMPLOY_REF, SAL_DATE FROM @TEMP_TABLE GROUP BY EMPLOY_REF, SAL_DATE HAVING COUNT(*) > 1


Once i have established these rows I want to delete them from the table. The code i had thought about (but QA doesnt like it) was:


DELETE FROM @TEMP_TABLE
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Can anyone suggest a way to go about this? Thanks people :)

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thanks

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hi,

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regards
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