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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Jan 12, 2000
Hi,
Does anybody know the SQL query to find the duplicate records?
Many Thanks in advance!
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Feb 4, 2003
Hello board,
I was wondering if anyone can tell me an easy way to find duplicate records on sql. The thing is this, at work we have a database (table) which includes tracking numbers, I need a easy way to be able to search this table for duplicate tracking numbers and print them out. I currently access this table to edit some data by using the following path “Start > Programs > Microsoft SQL Server > Enterprise Manager” then work my down the tree to “Databases > Master > Tables” on tables I do a right click and “open table/query”. Any help would be most appreciated. Believe me I’m very “SQL illiterate”
Bill
:confused:
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May 13, 1999
Hi,
As far as I know in SQL Server 6.5 there is no concept called rowid. How can I find duplicate records in a table and delete them.
Thanks,
Srini
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Apr 17, 2014
I have this query that I have been using to find duplicate records works great except for now. The logic I am adding is pcs_rreas <> 'NG'. When I add this it does take out the NG, but it also excludes the reocords that have NULL data in this field. I don't want that to happen. How can I fix this? I tried adding (pcs_rreas <> 'NG' or pcs_rreas is null) but nothing is pulling now.
SELECT pcs_id1, pcs_rreas, pcs_lname, pcs_fname, pcs_minit, pcs_degree, pcs_xtyp, pcs_office, pcs_dba, pcs_dob, pcs_sex, pcs_eff, pcs_trm, pcs_spec1, pcs_spec2, pcs_spec3,
pcs_spec4, pcs_tax1, pcs_ssn, pcs_altid, pcs_upin, pcs_medic, pcs_mcaid, pcs_ecs, pcs_npi, pcs_status, pcs_dir, pcs_den, pcs_www, pcs_hold, pcs_email,
pcs_misc1, pcs_misc2, pcs_newdt, pcs_newby, pcs_chgdt, pcs_chgby, pcs_malp, pcs_pf, pcs_ctl, pcs_sys, pcs_pay, pcs_ann, pcs_bcert, pcs_pass, pcs_w9,
pcs_taxex, pcs_tax2, pcs_type, pcs_rreas, pcs_routo, pcs_rtime, pcs_rdate, pcs_force, pcs_flag, pcs_v419, pcs_bcity, pcs_bstate,
[code]...
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Jul 28, 2014
How can I pull out duplicate records based on certain fields?
Table called Bank
I want to pull out records that have duplicate inv_no, cus_no, amount,ordernum
Not all the fields are the same in each record. But I want the records that have these fields that are the same.
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Jun 11, 2015
Someone ran an update statement multiple times so their are multiple entries in the table. Â What is the quickest way to track down the multiple entries? Â I would only want to see where timein and timeoff exist in the table multiple times for the same id. Â So this would be a duplicate
EntryID -- ID Â -- timein -- timeoff
1487 Â 11 Â Â 2015-05-05 16:33:23 Â 2015-05-05 18:45:26
1623 Â 11 Â Â 2015-05-05 16:33:23 Â 2015-05-05 18:45:26
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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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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 just discovered that all my records appear twice inside my table, inother words, they repeat on the row below. How can I delete all of theduplicates? I'm sure there must be a tidy line of sql to do that.Thanks,Bill
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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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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 ?
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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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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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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Apr 29, 2014
I have table 'stores' that has 3 columns (storeid, article, doc), I have a second table 'allstores' that has 3 columns(storeid(always 'ALL'), article, doc). The stores table's storeid column will have a stores id, then will have multiple articles, and docs. The 'allstores' table will have 'all' in the store for every article and doc combination. This table is like the master lookup table for all possible article and doc combinations. The 'stores' table will have the actual article and doc per storeid.
What I am wanting to pull is all article, doc combinations that exist in the 'allstores' table, but do not exist in the 'stores' table, per storeid. So if the article/doc combination exists in the 'allstores' table and in the 'stores' table for storeid of 50 does not use that combination, but store 51 does, I want the output of storeid 50, and what combination does not exist for that storeid. I will try this example:
'allstores' 'Stores'
storeid doc article storeid doc article
ALL 0010 001 101 0010 001
ALL 0010 002 101 0010 002
ALL 0011 001 102 0011 002
ALL 0011 002
So I want the query to pull the one from 'allstores' that does not exist in 'stores' which in this case would the 3rd record "ALL 0011 001".
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May 13, 2015
I created a CTE which finds a subset of records from a table
I then ran a SELECT statement against the same table as
SELECT * FROM TABLE
EXCEPT (SELECT * FROM CTE)
Is it possible to add another EXCEPT statement after the CTE EXCEPT statement to cover a condition not incorporated in the CTE definition?
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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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Mar 29, 2004
I have column A,B and C. I need a query to find the duplicates among these column.
Thanks,
Ravi
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May 28, 2008
I have written this script: What I want to do now is, with the new JOINED table find and display all the duplicates custID WHERE the price is either 100 OR 200. Can anyone help? I am very new to all this and can't see how to do it. Thanks!
SELECT
*
FROM
table_customer T1
INNER JOIN
table_itemsBought T2
ON
T2.custID = T1.custID
WHERE
price = '100'
OR price = '200';
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Oct 31, 2007
Hi, I have had this problem for a while and have not been able solve it.
What im looking at doing is looping thru my patient table and trying to organise the patients in to there admission sequence, so when patient "A" comes in and is treated at my hospital and is discharged and admitted to another Hospital within one day then patient "A" will get a code of 1 being there first admission.
then if patient "A" is admitted again but there admission date is greater than one day they get a code of 2 being for there second admission but will need to loop thru table looking for other admissions and discharges.
The table name is Adm_disc_Match_tbl
Basically what i have 4 fields.
Index_key = which is the patient common link (text)
ur_episode = this wil change for each Hospital (text)
Admission_datetime = patient admission date and time (datetime)
Discharge_datetime = patient discharge date and time (datetime)
example of data
Code: ( text )
Index_key,ur_episode,Admission_datetime,discharge_ datetime
HERBERT-7/1929,513884-1686900,4/07/2006 10:58,17/07/2006 13:37
HERBERT-7/1929,C023092-1698859,17/07/2006 13:20,24/07/2006 0:30
ELSIE-5/1916,G148445-1720874,8/08/2006 11:00,30/08/2006 10:00
STANISLAWA-3/1918 ,G119981-1720045,8/08/2006 13:01,22/08/2006 12:13
FREDA-11/1925,183772-1998910,27/03/2007 9:53,3/04/2007 11:06
FREDA-11/1925,G147858-2007408,3/04/2007 10:49,26/04/2007 12:39
FREDA-11/1925,183772-2037727,28/04/2007 17:05,9/05/2007 11:41
FREDA-11/1925,G147858-2052082,9/05/2007 12:00,25/05/2007 11:17
If anyone could help it would be much appreciated.
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Apr 30, 2004
I would like to locate duplicate rows within a specific table. This table has 12 diffrent rows.
BASENO - POSITION - SEQ - PROD -STYL - DESCR - FIELD01 THRU FIELD05 - VALUE01 THRU VALUE05 - FORMTYPE - ANSWER
I have been playing with the following query but can't seem to get it perfect to locate my dups within sql. Can someone help me with the querry?
I'm playing with the following querry.
SELECT
<list of all columns>
FROM
tablename
GROUP BY
<list of all columns>
HAVING
Count(*) > 1
Can somone possible input my column names into this querry that would possibly get it to locate my dups? I'm missing somehting and not sure what.
Thanks for any help
SQL Newbie
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Oct 17, 2013
I'm using this to find duplicates where a person has the same email but varying firstname and lastnames:
select distinct t1.booking_id, t1.first_name, t1.last_name, t1.email_add, t1.booking_status_id
from [aren1002].[BOOKING]
as t1 inner join [aren1002].[BOOKING]
as t2
on t1.last_name=t2.last_name and t1.booking_id<>t2.booking_id
where t1.booking_status_id = 330
order by last_name asc
Sample data:
3927 Greg Smith greg@emailno1.com 303
5012 John Smith greg@emailno1.com 303
6233 John Smith greg@emailno1.com 303
4880 Dulcie Abuud dulcie@theiremail.com 303
However it is listing the non duplicate rows, For example: The record with Abuud as the last name, doesn't have any duplicates in the table, so I don't want it listed.
The data should be like this:
3927 Greg Smith greg@emailno1.com 303
5012 John Smith greg@emailno1.com 303
6233 John Smith greg@emailno1.com 303
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Dec 10, 2013
Is there a way to find duplicate values and get the timediff from the start and end of each duplicate.
datetimeTagname value MachineValueTime Diff Minutes
12/9/13 8:55machine_1 14,423 Machine_1 14,423 5
12/9/13 9:00machine_1 14,423 Machine_1 14,428 9
12/9/13 9:05machine_1 14,428 Machine_1 42,743 4
12/9/13 9:10machine_1 14,428
12/9/13 9:14machine_1 14,428
12/9/13 11:32machine_1 42,743
12/9/13 11:36machine_1 42,743
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Jul 23, 2001
Hello,
Not sure how to do this. I think I need to use a Group By query. I have a "Products" table with the following fields:
Program#
Number
UPC
Item
Item#
Size
Dept
Everything is specific to the Program#. In other words, for every instance of a Program# there can be more than one Product, which is specified by the "Number" field. So: SELECT * FROM Product WHERE [Program#] = '12345' should return this:
12345 | 1 | 000012345678 | Cookies | 98765 | 12ct | Retail |
12345 | 2 | 000012345678 | Cake | 98765 | 12ct | Retail |
12345 | 3 | 000012345678 | Ice Cream | 98765 | 12ct | Retail |
However, some recordsets are returning like this:
12345 | 1 | 000012345678 | Cookies | 98765 | 12ct | Retail
12345 | 1 | 000012345678 | Cake | 98765 | 12ct | Retail
12345 | 2 | 000012345678 | Ice Cream | 98765 | 12ct | Retail
In which case I have to fix them (the "Number" field) with an update query sp they are numbered sequentially. Luckily, this doesn't happen very often.
Can someone help me with a query that will return only those records with duplicate values in the "Number" field? I am not sure how to construct this query which I will use as a stored procedure.
TIA,
Bruce Wexler
Programmer/Analyst
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May 28, 2012
I have the following table:
f_namef_countryf_ID
ABCUS123
DEFGB123
ABCUS456
GHIGB789
etc.
I need to run a query to discover all instances where a f_name and f_country pair exists for more than one f_ID. ABC/US is one such example; IDs 123 and 456 have this pair.
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Sep 6, 2007
In the FLAT FILE source, I have to find the duplicate rows based on the two fields say, "bill number" & "invoice date".
The rows within flat file has like "bill number" which is duplicated on the same "invoice date".
If duplicate rows found then move the duplicate rows into another Flat File.
If not found then move the rows into Sql Server Table.
Pls provide the solution. Thank you
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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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