Keep One Of Many Duplicate Rows, Delete The Others
Aug 7, 2007
I have a list of projects and am creating a query that tells me their duration based on beginning and ending dates. These beginning and ending dates can be edited by the user, and frequently, there are multiple beginning dates. When I query the projects, instead of getting unique project numbers on the left hand side to create unique rows, I get many of the same projects with different start dates. I would like to use the FIRST start date only for every project and not have multiple rows with the same projects being counted multiple times.
Is there any way to delete the excess rows and keep the original row? I've read a lot about using DISTINCT and UNIQUE INDEX with SQL but it seems as though these are only available for tables and not queries. Bright ideas, anyone?
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Oct 22, 2006
I need to append time log to time_log table. I could append table without errors.
But if I append the second time it duplicates. I cannot index Employee ID & Date coz there will be multiple entries.
Employee_ID, Date, IN, OUT
I need an append query which doesnt duplicate rows.
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Oct 24, 2006
I need to append some rows into a table, before I add these rows i need to delete all of the old rows.
I can't use a Make Table query because I am updating a linked table in another database.
So how can I (automatically) delete all rows in that table before or during the append process.
Thanks
Steve
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Nov 7, 2006
Hi.
How I can delete all rows from my table whit on query? Also I want that when I delete rows from my table index and other settings will stay in table.
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Jun 5, 2007
Good morning to you all.
I have a problem that I thought would be quite simple......
But 3 days later I am still trying.
I have a form which populates a table by one set of users (Simple enough) they can only add records.
I also have another set of users who want to access that table through a similar form but with a couple of added fields.
They will not be able to change anything only add their comments to what they see in the new fields supplied. Once this has been done it cannot be edited ever.
So I made a "Make Table Query" and added 2 new fields to that, so when I clicked on the query it came me the last update from the previous table. Problem was everything that was added in the extra fields were deleted!!!!
I would like to update the 2nd table with items that have been newly added to the first table, leaving all the items on the second table the way they were!!!!!!!
Anyone got any ideas please
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Jun 17, 2013
I am working with an Excel file of raw data aggregated from an annual customer relationship survey that has been sent out since 2010. The file has approximately 20,000 rows, meaning the survey has been taken around 20,000 times. Unfortunately, each time a customer takes the survey, it is included in the raw data as a separate entry. Therefore the file has numerous duplicate email addresses, corresponding with unique data for each time the survey was taken. Another issue regarding the data, is that in the first year the survey was sent out, the distribution mechanism "broke" and the survey was sent out multiple times (and completed multiple times) in the same year by the same customer, so the surveys are not necessarily uniformly distributed, if that makes sense.
I have been interested in isolating the common respondents (those who have taken the survey across multiple years, albeit not necessarily consecutive years). Up to this point, these respondents have been isolated manually using a pivot table, however I am now looking to enter the raw data into SPSS (a statistical analysis package), in order to view the drivers of these common respondents.
Therefore, I would like to be able to isolate these common respondents and the data corresponding with their surveys from the raw data in a separate worksheet or file. I have tried various formulas to do so in Excel to no avail. Is there anyway to accomplish this in Access or would a more complex database be needed?
Ideally the final product would have the common respondents' information from multiple surveys in one row and would be able to be filtered by feedback date (found in the raw data), so that hypothetically one could select a month and be able to tell how many customers considered to be common respondents completed a survey within that month.
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Apr 26, 2006
Is there a way to select several rows of records in a datasheet view of a table and delete all of the selected records?
Every time I try to delete more than one record at a time, I get the following message: "The Micorsoft Jet database engine stopped the process because you and another user are attempting to change the same data at the same time."
Then it will let me delete one record out of the selection.
I am the only one in that particular table at the time I am trying to delete the record.
Thanks in advance for your help...
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Oct 19, 2006
Hi
I have to make a query which deletes duplicate rows from my table. How I should start to make it? Can I do it whit one query or does this operation needs more queries? I know that DISTINCT works but how I can set it to DELETE operation?
I have try to use command DELETE DUPLICATES FROM Table; but this command deletes all rows from table why?
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Jul 24, 2013
I am trying to connect individual responses to a survey to a series of variables describing each environment where the survey was conducted. I have about 1,400 individual survey responses (of about 34 questions each that have been separated into columns) and about 42 environments that are described with 30 different criteria each. They are matched by the environment description
- A line for each respondent and their survey answers
- On that same line would be the criteria of each environment.
Thus, the environment criteria should be repeated several times..However, when I join the fields in a query and require both fields to be equal, When I prioritize the environment panel, I only receive 42 records and the survey responses are blank. Prioritizing the survey panel gives 1,400 rows, but omits the environment info.
how do I populate the environment information variables on each row of the survey responses, even if that information duplicates the same variables on other rows?
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Sep 5, 2007
Hi
I need to know if it is possible to create a delete query which will target particular fields in a row based on certain criteria in a seperate combo box(on same table).
The few ways that I have tried to do this have been unsuccesful so if anyone can shed some light on the subject it would be greatly appreciated.
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Feb 6, 2013
I have a competition ranking contestants. A contestant can compete multiple times, each time with a unique registration number.
I am trying to sort by score to rank the contestants, however the contestants can only receive one rank - their highest score (not a sum of their scores, only one score). ? ?
Example:
Registration Name Score
2345 Sally 247
3456 George 230
4672 Sally 255
What I want to see:
4672 Sally 255
3456 George 230
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Apr 30, 2007
Hello,
I have a table that has many duplicate records. I tried importing the table and setting the field to no duplicates but did not work. How can I delete duplicate records. The primary Id id fine I have another field that I can use. it is a BAC number that is repeated many times. Here is the table I need fixed.
Thanks
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Mar 22, 2006
Have searched the forum but cannot find a suitable answer...
I have duplicates in my table that I need to delete but leave one existing record, e.g.:
ID Part Family Colour Cost
1 123456 HHH M98765 12.99
2 123456 HHH M64975 12.99
3 123456 HHH E79461 12.99
4 123456 HHH G13467 12.99
5 123456 HHH M98765 12.99
In the above example i would want to delete records 2-5 (based on Part and Family, even though the colours are different) leaving one there. If I run the find duplicates and then change that to a delete query then it deletes them all.
This needs to be done via a query as it is done in automation, so manually copying the table structure and applying primary keys to the fileds etc. is not an option.
Any bright ideas?
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Mar 22, 2006
Have searched the forum but cannot find a suitable answer...
I have duplicates in my table that I need to delete but leave one existing record, e.g.:
ID Part Family Colour Cost
1 123456 HHH M98765 12.99
2 123456 HHH M64975 12.99
3 123456 HHH E79461 12.99
4 123456 HHH G13467 12.99
5 123456 HHH M98765 12.99
In the above example i would want to delete records 2-5 (based on Part and Family, even though the colours are different) leaving one there. If I run the find duplicates and then change that to a delete query then it deletes them all.
This needs to be done via a query as it is done in automation, so manually copying the table structure and applying primary keys to the fileds etc. is not an option.
Any bright ideas?
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Jan 14, 2008
On the below data I need to delete records where dep is blank or the same for the same ID. So I need to find and del recNr. 1,4,5. Any help will be appreceated!Thanks
recNr IDDep
1 ABX
2 ABX 1234
3 ABX 1258
4 CDE
5 CDE 7895
6 CDE 7895
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Feb 2, 2006
Help please!
I have a form (frmHalfTab) built on a table (tblHalfTab2) that has existing data in it. In the very near future, I will be uploading additional data to this table via excel cut and paste. What I want to do is search for and eliminate duplicate records that have duplicate data in TWO fields, (MemberNum) and (MBRDrug), so that if MemberNum is "10" and MBRDrug is "Zzz" for more than one record, the duplicated records need to be deleted, OR a check box needs to be checked automatically for all the identical records, the original and the duplicate(s). I wanted to put this behind a button, if possible.
Now, I have created a duplicate query that will find the duplicated records, but I'm not sure how to use it to get rid of the duplicated records or check the checkbox appropriately. Should I ditch this query and choose a different route, or am I on the right track? Thanks in advance for your help.:confused:
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Apr 22, 2014
I have a query based on 2 tables, joined on Memberid, the result showing :
Table1 Table1 Table1 Table2 Table 2 Table2
Category Association Memberid CustomerName E-mailAddress MemberID
Board Member(Lookup,integer) SAMGA(Lookup,integer) 44 Smith smith@abc.co.za 44
Board Member ADHTY 44 Smith smith@abc.co.za 44
Grower SAMGA 44 Smith smith@abc.co.za 44
I only want to show 1 row, based on the duplication of E-mail address. I know i should be using the row_number function, but cannot get to the result I want.
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Dec 14, 2004
Hello,
I have two related table: table_Company and table_contact. Now i have:
Table_Contact Table_Company
James Bolton -----------> MacDonalds
Hellen Kidman ----------> MacDonalds
Now, i wanna have one "MacDonalds" in my Company table, and delete the others "MacDonalds" and still have the relationship between my contacts and their company.
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Mar 5, 2006
Good morning all!
I have a problem, I have a contact list table in my database such as name, addr, company, street, country etc. The problem is that I have multiple duplicates of the same data.
How do i delete the duplicates? Is there an SQL query that I can run to delete? How do I do it. Please help. Thanks a bunch!
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Sep 1, 2005
Hi,
I have table tblSample (IdNo, SCode, StaffNo) where IdNo is AutoNumber. This is sample of data,
IdNo SCode StaffNo
10 ABC 50424
11 DEF 50424
12 GHI 50424
21 ABC 50424
22 DEF 50424
23 GHI 50424
26 ABC 50424
27 DEF 50424
28 GHI 50424
Is it possible for me to delete records from IdNo 21-23 and IdNo from IdNo 26-28. Any idea? Thanx in advance..;)
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Apr 12, 2012
I have two tables that have duplicate order numbers. I would like to compare the first table with the second and then delete the records from the second that match.Can I set this up in a macro and run it every day?
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Feb 19, 2013
I have a table that has 1335 records in, and columns names, Title, First Name, Surname, Address, Address2, Town/City, County, Postcode.I want to know how to write a SQL code, which will locate all the duplicates that match the First Name, Surname and Postcode and delete them, but keeping 1 copy of the duplicate.I have created a query to locate the duplicate records, and I have put the SQL code there. I tried changing this, however it would delete all the records, so I am not to sure what to try...
SELECT SurnameSearch.Title, SurnameSearch.[First Name], SurnameSearch.Surname, SurnameSearch.Address, SurnameSearch.Address2, SurnameSearch.[Town/City], SurnameSearch.County, SurnameSearch.Postcode
FROM SurnameSearch
WHERE (((SurnameSearch.[First Name]) In (SELECT [First Name] FROM [SurnameSearch] As Tmp GROUP BY [First Name],[Surname],[Postcode] HAVING Count(*)>1 And [Surname] = [SurnameSearch].[Surname] And [Postcode] = [SurnameSearch].[Postcode])))
ORDER BY SurnameSearch.[First Name], SurnameSearch.Surname, SurnameSearch.Postcode;
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Jun 12, 2013
I am trying to create a query to find duplicates and delete the duplicates. The result will eventually be used in another query (append query) to update a table.I have a table with 4 columns lets say for simplicity they are A, B, C, D
I want my query to find duplicates within B and deleting them. The catch is before deleting them I need to look into column A to ebsure they are actually duplicates. Example below
Example
A B
John Doe Tires
John Doe Wipers
Allison Doe Tires
Allison Doe Tires
As you can see from the above Tires is a duplicate and need to be deleted.
A B
John Doe Tires
John Doe Wipers
Allison Doe Tires
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Nov 18, 2014
The charity that I volunteer at has a web site through which they receive donations.
Most of the COMPANY names that they receive through their website are JUNK.
I would like to have a system to delete duplicate company names:
A = first programmatically delete all company names that are GOOGLE and this will remove about 60% of their spam
B = next group all Duplicate Company names, which will be removed manually
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Sep 24, 2013
I know this probably has been asked a 1000 times but I don't seem to be able to edit the uncommented VBA-codes I found online to work on my database.
I already ran a query that shows me the duplicate records of my original table. Now I m looking for a way to
a) delete all duplicate records (not just specific ones by using a criteria) and
b) unite the unique records (result of a)) with the original ones that were not displayed with the "find-duplicates-query" ....
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Apr 22, 2014
I'm wondering if it's possible to create a Query / Macro / VBA or whatever works, to detect the duplicate records in a table and delete them with the push of a command button. Or, even to do this automatically when the database opens using an AutoExec macro or something ?. I'd like for one copy of each record to be left intact in the table.
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