Delete Duplicate Rows Using T-SQL
Jan 20, 2000How do you delete duplicate rows in a table so only one row is left in the table, using T-SQL.
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Delete Duplicate Rows
Jun 25, 2000I have a table which looks as follow:
field1 field2 field3 field4 field5 ......
A B C A X ......
A B C B Y ......
A B C C Z ......
A B C A Y ......
. . . . . ......
I want to delete all the rows except one row. Anybody can help?
Thank you very much.
DELETE DUPLICATE ROWS
Mar 30, 1999CAN ANYBODY REPLY FOLLOWING QUESTIONS. I WANT TO DELETE DUPLICATE ROWS
IN MY TABLE WITHOUT USING TRANSACTION TABLE. AND ONE MORE QUESTION HOW
TO GET YESTERDAY DATE BY USING ISQL WINDOW.
THANKS
JK
Delete Duplicate Rows
Jan 13, 2005Suppose that we have the following rows in a MSSQL table :
1administrateur1NULLNULL
2administrateur2NULLNULL
1administrateur1NULLNULL
2administrateur2NULLNULL
How to remove duplicates (leave only the 2 first rows) ?
Delete Duplicate Rows
Oct 17, 2005Hi,
I have the following query to select duplicate rows from the table. How can i delete them with out using temp table.
select UserName, Title, Name, ColWidth, Sequence
from table1 (nolock))
Group by UserName, Title, Name, ColWidth, Sequence
Having count(*) >1
Any help would be greately appreciated.
Thanks
Delete Duplicate ROWS
Jun 18, 2008How to delete duplicate records from table ? Is there any query for that ?
I am using SQL 2005.
Delete Duplicate Rows
Jan 27, 2014declare @a1 table
(id int not null identity(1,1),
phone decimal(18,0),
adress nvarchar(100))
insert @a1
(phone,adress)
[Code] ....
id phone address
----------- --------------------------------------- ----------------------------------------------------------------------------------------------------
1 111 new york
2 111 new york
3 111 new york
4 222 maxico
5 222 mexico
select phone,count(phone) as say from @a1 group by phone having count(phone)>1
phone say
--------------------------------------- -----------
111 3
222 2
How can I remove duplicate phone. For example
after delete
select*from @a1
select*from @a1
id phone address
----------- --------------------------------------- ----------------------------------------------------------------------------------------------------
1 111 new york
4 222 maxico
I wrote this to show for example in my real table have 50000 rows and 1751 duplicate rows.
[URL] .....
How Do You Delete Duplicate Rows......
Jan 18, 2006How do you delete duplicate rows when there are constraints or like in professional terms as we say "Referential Integrity".
Mr.Madhivanan i hope you remember me. Because it is after all purpose that binds us all together...purpose...it is inevitable Mr.Madhivanan.
How To Delete Duplicate Rows Retaining Only One Of Them From Every Set Of Duplicates.
Apr 10, 2008
I have a table employee_test having the sample data. The rows with EmployeeID=6 are duplicate rows. I want to delete the duplicates retaining one row for the employeeid=6.
Note :- I don't want to use a temporary table. I want to do this using a single query or at the most in a SP query batch. Please advise.
EMPLOYEEID
ENAME
SALARY
MANAGERID
1
Anee
1000
11
2
Rick
1200
12
3
JOHN
1100
13
4
ABC
1300
14
5
DEF
1400
15
6
DEF
1400
15
6
DEF
1400
15
Delete Duplicate Rows With No Unique Columns
Apr 3, 2000I have 4 rows which are exactly the same. I want to delete one row but i do not have any unique identifing columns. How should i delete that row ?
View 1 Replies View RelatedTransact SQL :: Delete Duplicate Rows From Table?
Jul 21, 2015I have a table with more than 1000 records. The columns look like this
Import id | Reference | Date | Username | Filename
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
Is it possible to delete these kind of duplicate rows by ignoring the import id ?
Need A Stored Procedure To Delete Duplicate Rows
Oct 22, 2007hi every body
can any onehelp me in making a stored procedure to delete a duplicate rows in tables
thanks in advance
SQL Server 2008 :: Delete Duplicate Rows From ANY Table
Jul 31, 2015Is there is 'fairly' simple query to delete duplicate rows from ANY table ?
A script which removes duplicates from a table, when a table_name is supplied.
Delete Duplicate Rows From Two Tables With Same Structure In Sql Server 2000
Aug 20, 2007 Hi
I want to delete the duplicate rows from two tables and get the resultant non-duplicate rows from both the tables into another table
SQL Server 2012 :: How To Delete Duplicate Rows Present In Parent Table
Oct 19, 2014I have a master table and i need to import the rows into the parent and child table.
Master table name is Flatfile_Inventory
Parent Table name is INVENTORY
Child Tables name are INVENTORY_AMOUNT,INVENTORY_DETAILS,INVENTORY_VEHICLE,
Error details will be goes to LOG_INVENTORY_ERROR
I have 4 duplicate rows in the Flatfile_Inventory which i have already inserted in the Parent and child table.
Again when i run the query using stored procedure,its tells that all the 4 rows are duplicate and will move to the Log_Inventory_Error.
I need is if i have the duplicate rows in the flatfile_Inventory when i start inserting into the parent and child table the already inserted row have the unique ID i must identify it and delete that row in the both parent and chlid table.And latest row must get inserted into the Parent and child table from Flatfile_Inventory.
-- ===============================================================================================
-- STORED PROCEDURE FOR FLATFILE_INVENTORY
-- ===============================================================================================
USE [IconicMarketing]
---=======================================SALES_CURSUR===========================================
--USE IconicMarketing
--GO
DECLARE
@FileType varchar(50) ,
@ACDealerID varchar(50) ,
[code].....
Delete Rows With Duplicate Column Data But Unique Row Data
May 25, 2000Hello,
This probably has been addressed before but I was unable to get the search to work properly on this site.
I am needing a script/way of deleting all rows from a DB with the exception of one record left for each row that has duplicate column data. Example :
Row 1
Field1 = 12345 Field2 =xxxxx Field 3=yyyyy Field4=zzzzz etc.
Row 2
Field1 = 12345 Field2 =zzzzzz Field 3=xxxxxx Field4=yyyyyy etc.
Row3
Field1 = 12345 Field2 =20202 Field 3=11111 Field4=zzzzz etc.
Row 4
Field1 = 54321 Field2 =xxxxx Field 3=yyyyy Field4=zzzzz etc.
Etc. Etc.
I want to be able to find the duplicates for Field1 and then delete all but 1 of those rows.( I don't care which one I keep just so only one is left.) The data in the other fields may or may not be unique.
I know how to find the duplicates it's just the deleting part I am having problems with. Any help would be much appreciated. Thanks,
Kerry
Select Distinct Rows From Duplicate Rows....
Nov 28, 2007Dear Gurus,I have table with following entriesTable name = CustomerName Weight------------ -----------Sanjeev 85Sanjeev 75Rajeev 80Rajeev 45Sandy 35Sandy 30Harry 15Harry 45I need a output as followName Weight------------ -----------Sanjeev 85Rajeev 80Sandy 30Harry 45ORName Weight------------ -----------Sanjeev 75Rajeev 45Sandy 35Harry 15i.e. only distinct Name should display with only one value of Weight.I tried with 'group by' on Name column but it shows me all rows.Could anyone help me for above.Thanking in Advance.RegardsSanjeevJoin Bytes!
View 4 Replies View RelatedHow To Run Delete Query / Delete Several Rows Just By One Click ?
Feb 16, 2008I'm using SqlDataSource and an Access database. Let's say I got two tables:user: userID, usernamemessage: userID, messagetextLet's say a user can register on my website, and leave several messages there. I have an admin page where I can select a user and delete all of his messages just by clicking one button.What would be the best (and easiest) way to make this?Here's my suggestion:I have made a "delete query" (with userID as parameter) in MS Access. It deletes all messages of a user when I type in the userID and click ok.Would it be possible to do this on my ASP.net page? If yes, what would the script look like?(yes, it is a newbie question)
View 2 Replies View RelatedDelete Doesn't Delete Rows, But @@ROWCOUNT Says It Did
Aug 20, 2007I ran the following query in Query Analyzer on a machine running SQL Server 2000. I'm attempting to delete from a linked server running SQL Server 2005:
DELETE FROM sql2005.production.dbo.products
WHERE vendor='Foo'
AND productId NOT IN
(
SELECT productId FROM sql2000.staging.dbo.fooProductList
)
The status message (and @@ROWCOUNT) told me 8 rows were affected, but nothing was actually deleted; when I ran a SELECT with the same criteria as the DELETE, all 8 rows are still there. So, once more I tried the DELETE command. This time it told me 7 rows were affected; when I ran the SELECT again, 5 of the rows were still there. Finally, after running this exact same DELETE query 5 times, I was able to remove all 8 rows. Each time it would tell me that a different number of rows had been deleted, and in no case was that number accurate.
I've never seen anything like this before. Neither of the tables involved were undergoing any other changes. There's no replication going on, or anything else that should introduce any delays. And I run queries like this all day, involving every thinkable combination of 2000 and 2005 servers, that don't give me any trouble.
Does anyone have suggestions on what might cause this sort of behavior?
How To Create A Trigger Such That It Can Delete The Rows Whenever Any Other Application Such As Biztalk Had Read The Rows ?
Mar 12, 2007I had created a trigger which sees that whether a database is updated if it is its copy the values of the updated row into another control table now I want to read the content of control_table into BIzTalk and after reading I want to delete it.Can any one suggest the suitable ay to do this?
View 3 Replies View RelatedTransact SQL :: Table Trigger To Delete All Rows Before Inserting Rows
Jul 24, 2015I have a SQL script to insert data into a table as below:
INSERT into [SRV1INS2].BB.dbo.Agents2
select * from [SRV2INS14].DD.dbo.Agents
I just want to set a Trigger on Agents2 Table, which could delete all rows in the table , before carry out any Insert operation using above statement.I had below Table Trigger on [SRV1INS2].BB.dbo.Agents2 Table as below: But it did not perform what I intend to do.
USE [BB]
GO
/****** Object: Trigger Script Date: 24/07/2015 3:41:38 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
[code]....
Delete Duplicate Records
Jul 30, 2004I use a tabel for storin log data from a mail server. I noticed that I'm getting duplicate records, is there a way to delete the socond and/or third entry so I dont have any duplicates?
I need this done in SP.
Delete Duplicate Records
Oct 19, 2000Sorry for the new thread.
I have a userprofile table. There are a lot of duplicate records in this table. e.g.
USERID-----LASTNAME---EMAILADDRESS----CREATEDATE
----------------------------------------------------------------------
1----------A-----------A@yahoo.com---------2000-09-05 16:07:00.000
2----------A-----------A@yahoo.com---------2000-09-10 16:07:00.000
3----------A-----------A@yahoo.com---------2000-09-15 16:07:00.000
Userid is auto number, lastname and emailaddress are PK.
I want to delete duplicate records. If lastname and emailaddress are the same, only keep a record which createdate is the most newest date. See above example I only want to the record which userid is 3. I have alreday created a code which I attached below. This code onle keep a record which userid is 1.
Anybody can help me to solve this problem? Thanks.
============== My current code ====================
delete from userprofile where userprofile.userid in
--list all rows that have duplicates
(select p.userid
from userprofile as p
where exists
(select lastname, emailaddress
from userprofile
where lastname = p.lastname and emailaddress = p.emailaddress
group by lastname, emailaddress
having count (userid)>1))
and userprofile.userid not in
--list on row from each set of duplicate
(select min(p.userid)
from userprofile as p
where exists
(select lastname, emailaddress
from userprofile
where lastname = p.lastname and emailaddress = p.emailaddress
group by lastname, emailaddress
having count (userid)>1)
group by lastname, emailaddress)
How Can I Delete All But One Instance Of A Duplicate Row?
Oct 7, 2004I have several rows in a table that contain duplicate information. I want to trim them down to one instance per row, without other duplicates.
I have several columns, but only 2 of the columns are used to determine the "Identical Rows", however one of the other columns could also be used to determine which of the others are deleted.
Let's just say I have a table called DATA.
In DATA I have the following columns:
C1: ID/Key column (Unique numbers not associated with any other row)
C2: Specific Data column 1
C3: Specific Data Column 2
C3: Keeper if not null
C4: Misc Info
C5: Misc Info
Basically IF C2 & C3 are duplicated, then I want to keep one of these and ditch the others.
The row I want to keep is the one that has info in C4, but at times C4 does not have anything in it on any of them, at that point I just care about keeping one of the C2 & C3 Duplicate rows.
The other issue I face is C2 will always have something in it, but at times C3 will not and C4 will.
So I want to keep the one duplicate row that has the most info in it. At minimum, I want to always keep C2 & C3 if they both contain data.
For example, if I had the following duplicate rows:
(C2) red (C3) 123 (C4) XYZ
(C2) red (C3) 123 (C4) XYZ
(C2) red (C3) 123 (C4) XYZ
(C2) red (C3) (C4) XYZ
(C2) red (C3) 123 (C4)
I want to keep: (C2) red (C3) 123 (C4) XYZ
I have some rows that have three exact duplicates, some that have four, some that have two.
How can I tell the Query Manager to delete all but one instance of each duplicate row?
I did do a query to find out how many duplicates I have and found it to be around 232,000+. Basically I will be cutting this in half if I can get rid of the duplicates.
I have read 30 different ways on many sites and I am now officially confused
Thank you for your help.
Delete Duplicate User
Apr 30, 2008Hello I am import a file into a SSIS package. Is there a easy way to delete duplicate user in the file. Could i use a sql task or something.
thanks
Duplicate Delete Timeout
May 2, 2008Hi All,
I am trying to delete the duplicates from a table, but keep 1 of the records.
Here is my query which works on smaller tables <2000 records, but the query either timeouts or just runs and runs on larger tables >50,000 and >150,000.
DELETE
FROM Table1
WHERE Table1.ID IN
/* LIST 1 - all rows that have duplicates*/
(SELECT F.ID
FROM Table1 AS F
WHERE EXISTS ( SELECT computerName, programName, version, publisher, Count(ID)
FROM Table1
WHERE Table1.computerName = F.computerName
AND Table1.programName = F.programName
AND Table1.version = F.version
AND Table1.publisher = F.publisher
GROUP BY Table1.computerName, Table1.programName, Table1.version, Table1.publisher
HAVING Count(Table1.ID) > 1))
AND Table1.ID NOT IN
/* LIST 2 - one row from each set of duplicate*/
(SELECT Min(ID)
FROM Table1 AS F
WHERE EXISTS ( SELECT computerName, programName, version, publisher, Count(ID)
FROM Table1
WHERE Table1.computerName = F.computerName
AND Table1.programName = F.programName
AND Table1.version = F.version
AND Table1.publisher = F.publisher
GROUP BY Table1.computerName, Table1.programName, Table1.version, Table1.publisher
HAVING Count(Table1.ID) > 1)
GROUP BY computerName, programName, version, publisher);
TABLE STRUCTURE::
ID computerName programName version publisher installDate
1 COMP1Microsoft .NET Framework 1.11.1.4322Microsoft 20050216
2 COMP1Windows XP Hotfix - KB89178120050110.17Microsoft NULL
3 COMP1Windows Media Player 10 NULL NULL NULL
4 COMP1Microsoft .NET Framework 1.11.1.4322Microsoft 02/16/2005
The duplicate records i am trying to delete are not truly duplicates, each record has a unique ID and install dates could vary. I am trying to identify duplicate records as identical (computerName + programName + version + publisher) See records 1 and 4 in table structure above... i dont care which of the duplicates is kept, as long as 1 is kept.
What I am looking for is either a completely new query which maybe optimized to run on a larger scale table or maybe just a performance tweak to my exisitng query??
Any help would be greatly appreciated!
Thanks.
Delete Duplicate Records
May 7, 2008Hello everyone,
I have a little dilemma. I have a table ALLTABLE that has duplicate records and I want to delete them. ALLTABLE has these columns with these values for example:
Policy Premium Class State Entity Number
ADC-WC-0010005-0 25476 63 31 1
ADC-WC-0010005-0 25476 63 31 2
ADC-WC-0010005-0 25476 63 31 3
ADC-WC-0010005-0 1457 63 29 4
ADC-WC-0010092-1 2322 63 37 1
ADC-WC-0010344-0 515 63 01 1
ADC-WC-0010344-0 515 63 01 2
As you can see there is some duplicates in the first 3 rows and the final 2 (the entity number is the only difference). I want the table to look like this:
Policy Premium Class State Entity Number
ADC-WC-0010005-0 25476 63 31 1
ADC-WC-0010005-0 1457 63 29 4
ADC-WC-0010092-1 2322 63 37 1
ADC-WC-0010344-0 515 63 01 1
Thank you so much for the help. It is really appreciated.
How Can I Delete Duplicate Records
Jun 5, 2008Hi Guys,
I have the following table
customerid customername
------------------------
1 AAA
1 AAA
2 BBB
2 BBB
2 BBB
3 CCC
3 CCC
Here, I need to delete duplicate records from the above table.
After deleting the duplicate records the table should be
like this:
customerid customername
------------------------
1 AAA
2 BBB
3 CCC
Can any one help me!!!!!!
Regards
js.reddy
Delete Duplicate Records
Jun 24, 2008Hi,
Please help me in constructing a query that will delete duplicate records in a table;
Please see my table structure below:
CREATE TABLE LATEST_DATA (
[ID] int NOT NULL,
[IPage] varchar(100) NULL,
[IDevice] varchar(255) NULL,
[IGroup] varchar(255) NULL,
[IField] varchar(255) NULL,
[IValue] varchar(255) NULL,
[IIcon] int NULL,
[IID] int NULL,
[ReportID] int NOT NULL,
[RVersion] varchar(255) NULL,
[RHost] varchar(255) NULL,
[RUser] varchar(255) NULL,
[RLocation] varchar(255) NULL,
[RDateTime] varchar(16) NULL,
[RComplete] bit NOT NULL
);
-- Insert Latest data
INSERT
INTO LATEST_DATA
SELECT
[Item].[ID],
[Item].[IPage],
[Item].[IDevice],
[Item].[IGroup],
[Item].[IField],
[Item].[IValue],
[Item].[IIcon],
[Item].[IID],
[Item].[ReportID] ,
[Report].[RVersion],
[Report].[RHost],
[Report].[RUser],
[Report].[RLocation],
[Report].[RDateTime],
[Report].[RComplete]
FROM
[dbo].[Item],
[dbo].[Report]
WHERE
[Report].[ID] = [ITEM].[ReportID] AND
[Report].[ID] = ( SELECT
MAX([Report].[ID])
FROM
[dbo].[Report]
);
thanks
Delete Duplicate Record
Oct 23, 2006Hi ,
How can i delete the duplicate record from a table
use Northwind
create table Emp (Ecode char(2), Ename char(10))
Insert into Emp(Ecode, Ename) values('A1','A')
Insert into Emp(Ecode, Ename) values('A1','A')
Insert into Emp(Ecode, Ename) values('A2','B')
Insert into Emp(Ecode, Ename) values('A2','B')
Insert into Emp(Ecode, Ename) values('A3','C')
Insert into Emp(Ecode, Ename) values('A3','C')
Insert into Emp(Ecode, Ename) values('A4','D')
Insert into Emp(Ecode, Ename) values('A4','D')
select * from emp order by Ecode
Thanks
ASM
Have Duplicate Records, Can't Delete Extras!
Apr 9, 2008I have inherited a database with no primary keys in it. :(
There are, of course, duplicate records by the "logical key", i.e., the list of columns that should have been used in a primary key, if they only had one. I can easily identify when I have duplicate records using group by and having clauses. That's the easy part.I can identify duplicate records by "key columns" and the subset of those records that are "identical duplicates on all columns". I need to delete the "extra copies"
I can't do it by hand using sql server manager, it won't let me, because it recognizes that more than one row matches that row. In Oracle, I would use the pseudo-column "rowid", which would expose the internal identifier for the row.SqlServer doesn't appear to have this concept. is there another way other than creating an empty shadow table, copying all the distinct duplicate records into the shadow table, deleting all the duplicates in the old table, then copying the distinct duplicates back into the old table.
How To Delete Duplicate Records From A Table
Nov 29, 2004Hello All,
Please show me how to delete duplicate records from a table.
Thanks in Advance
Delete Duplicate Records Without Primary Key
Feb 5, 2012I want to delete the duplicate record from a table keeping 1 record aside.
My base table is-info
idnameclass
2abc6a
3abc6a
4abc6a
1abc6a
2abc6a
4abc6a
4abc6a
3abc6a
3abc6a
1abc6a
2abc6a
5abc6a
id-int
name-text
class-varchar
(there is no primary key in this table)
Now I want the result in following way:
idnameclass
2abc6a
3abc6a
4abc6a
1abc6a
I have tried the following query and its running fine but its not a dynamic stuff.
DELETE top (SELECT COUNT(*)-1 FROM aaa WHERE id ='3') --or put some number
FROM aaa
WHERE id ='3'-- or put some number