Comments on: SQL SERVER – Count Duplicate Records – Rows

By: Gavin F

Gavin F — Tue, 20 Oct 2009 10:40:50 +0000

Thank you Pinal & udai,
great help in increasing my sql knowledge :).

By: Samy

Samy — Tue, 29 Sep 2009 13:50:25 +0000

Good solution, many thanks for this.

By: udai

udai — Thu, 24 Sep 2009 12:02:29 +0000

Hi lutfi

may be this will help you

select user_name,transaction_id, transaction_time from transactions where transaction_time in (select transaction_time from transactions group by transaction_time having count(transaction_time) > 1)

By: lutfi

lutfi — Mon, 10 Aug 2009 04:20:12 +0000

hi all

can you help me, I want to find transaction with the same minutes on the table transactions

example case : I have 2 user which has 3 time transaction on the same minutes of the day on my Transaction table

can you give me the example script please …send it my email : ifi.lutfi@pln.co.id

Thanks …

By: Ian

Ian — Wed, 15 Jul 2009 08:38:02 +0000

This one is a great help however I’ve tried retrieving other fields besides the one I’m counting with duplicate record. How do I do that? This is my script. I can’t seem to include the claim_no, lastname and firstname field.

SELECT bank_acct, COUNT(*)

FROM july09_master_copy
WHERE cl_status = ‘z’
AND rid_ind = ‘r’
GROUP BY bank_acct
HAVING COUNT(*) >1
ORDER BY COUNT(*)

By: Kami

Kami — Tue, 23 Jun 2009 05:32:55 +0000

i have a data entry system for patient records. in my system there are several forms through which data is entered in different tables. and there is a form which takes the present condition of the patient (i call it PresentAssessment). now i what i want is when the user enters a new record i want to compare the values of the attributes (database table fields) of the newly entered patient and from all the matching records i want to calculate and return the chance(in terms of %age) of particular disease(s) (stored in PresentAssessment) to newly added patient. e.g. if i have two tables i.e. PatientDrugHistory and PresentAssessment. and say each of them already have 10 records with 10 columns each. now when entering the 11th record in PatientDrugHistory i want to calculte and store how much chances (in terms of %age) exist that this 11th patient is suffereing from disease1 (a column in PresentAssessment). please if anybody can tell me what query to write for this purpose

By: yadav

yadav — Thu, 16 Apr 2009 10:06:38 +0000

its really good update its help ful for every one thanks

By: Jai

Jai — Tue, 14 Apr 2009 21:38:11 +0000

Hey Pinal,

Excellent query ! thanks !

By: Nathan

Nathan — Mon, 30 Mar 2009 21:58:39 +0000

If you’d like to get a total count of the duplicates as I needed to do, try returning the above query as a derived table and then do a sum on the count.

SELECT SUM(Duplicates.TotalCount) FROM (SELECT YourColumn, COUNT(*) TotalCount
FROM YourTable
GROUP BY YourColumn
HAVING COUNT(*) > 1) AS Duplicates

My database has over 1200 duplicates. :(

By: SQLAuthority News - Best Articles on SQLAuthority.com Journey to SQL Authority with Pinal Dave

Tue, 24 Feb 2009 12:09:46 +0000

[...] SQL SERVER – Count Duplicate Records – Rows [...]

By: MarioSanath(SriLankan)

MarioSanath(SriLankan) — Wed, 04 Feb 2009 12:20:29 +0000

SELECT YourColumn, COUNT(*) TotalCount
FROM YourTable
GROUP BY YourColumn
HAVING COUNT(*) > 1
ORDER BY COUNT(*) DESC

this query is solved my lot of problems
Thank you very much

By: Florin

Florin — Wed, 21 Jan 2009 15:25:52 +0000

u r good

By: tejasnshah

tejasnshah — Fri, 02 Jan 2009 05:00:08 +0000

Hi,

I have written to get Duplicate Rows from the table. You can use the ROW_Number() in SQL 2005.

To read more about it:

http://tejasnshah.wordpress.com/2008/12/31/find-duplicate-rows-with-row_number-sql-server-2005/

Tejas

By: EK

EK — Thu, 01 Jan 2009 13:34:05 +0000

Did it, quite new to SQL I’m afriad, hope it helps another novice :)

SELECT top 20 computers.name as CID, COUNT(*) as ErrorCount
FROM errors
inner join computers
on computers.id = errors.computerid
GROUP BY computers.name
HAVING COUNT(*) > 1
ORDER BY COUNT(*) DESC

By: EK

EK — Thu, 01 Jan 2009 13:15:49 +0000

Using the above Query is nearly just what I need but it only gives me an ID (YourColumn). I have another table which would have a named value for this ID. How can I return that instead? A Join or a nested statement?

Many thanks

By: mahi

mahi — Tue, 30 Dec 2008 06:19:56 +0000

select Taluk_Name_Eng ,count(Taluk_Name_Eng)as kk from tbl_PL04_Taluk

what problem in this query

By: Baal

Baal — Fri, 12 Dec 2008 19:39:04 +0000

thanks.

By: padma

padma — Thu, 13 Nov 2008 17:39:41 +0000

HI Pinal,

If I want to select all the fields in a table,
How shold I write the query for that

thank u

By: Rajesh

Rajesh — Thu, 23 Oct 2008 12:17:29 +0000

Thanks.

By: Ashok

Ashok — Tue, 14 Oct 2008 12:26:30 +0000

I need to limit the number of duplicates. Can this be achieved? Thanks.