Select Without Duplicates
Jul 20, 2005
my data is like so.
IdDate Transaction
5459/24/2003 3:01:08 PM13051:10
5469/24/2003 3:03:30 PM13051:10
5389/24/2003 2:53:31 PM13051:1002
5399/24/2003 2:54:57 PM13051:1002
1369/24/2003 10:08:45 AM13051:101
1379/24/2003 10:08:47 AM13051:101
I wanna run a query that gives me
IdDate Transaction
5459/24/2003 3:01:08 PM13051:10
5389/24/2003 2:53:31 PM13051:1002
1369/24/2003 10:08:45 AM13051:101
The first record of the duplicates
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Jul 5, 2007
Just wanted to ask how to get all the duplicates records in a table. If I have say the following:
col1 col2 col3 col4 col5
1 A1 ABC A21 AJ
1 A1 ABC A21 AJ
1 A2 ABC A21 AJ
The query should return the first 2 identical rows. I tried the following form but as you can see it has flaw that it gets the 3rd row as well simply because the outer select uses col1 as a condition which could belong to a "not completely" identical row.
The inner select results in the distinct duplicate rows (2 in the table above, either of row 1 or 2 and row 3).
select *
from table1
where col1 IN
(select col1
from table1
group by col1, col2, col3, col4, col5
having count(*) > 1
)
Thank you for any help and have a great week end!
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Dec 9, 2011
I need to create my select statement to pull product details based on category, clientid (database runs two e-commerce sites).When i add the 'ClientOffers' table, it messes up the results. i get some duplicates.
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Apr 11, 2008
Hi All,
I need to eliminate Duplicates in my Sql Query, tried to use distinct and that doesn't seem to work, can anybody pls.help.
duplicates are in #ddtempC table, and am writing a query to get a country name from the hash table where hash table has duplicates
hash table contains (THEATER_CODE, COUNTRY_CODE, COUNTRY_NAME).
and trying to write condition on THEATER_CODE and COUNTRY_CODE to get Country_name
and THEATER_CODE AND COUNTRY_CODE HAS DUPLICATES. whenever i do a sub query i get the below error.
Msg 512, Level 16, State 1, Line 1
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
SELECT USER_FIRSTNAME, USER_LASTNAME,
user_countryCode,
USER_COUNTRY = (SELECT DISTINCT RTRIM(LTRIM(COUNTRY_NAME)) FROM #ddtempC WHERE RTRIM(LTRIM(COUNTRY_CODE)) = USER_COUNTRYCODE AND RTRIM(LTRIM(THEATER_CODE)) = USER_THEATERCODE)
FROM [user]
WHERE USER_USERNAME IS NOT NULL AND User_CreationDate BETWEEN '1/2/2007' AND '4/11/2008'
ORDER BY User_TheaterCode;
Thanks in Advance.
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Apr 22, 2008
I have a table with DiscNo, Artist, Title and other fields. I would like to find all duplicate records with the same artist/title and with the first 3 characters of the discnumber. e.g.
SELECT Artist, Title Into #TempArtistTitle FROM MediaFile GROUP BY Artist, Title
HAVING COUNT(SubString(DiscNo, 0, 3)) > 1
SELECT MediaFile.DiscNo, MediaFile.Artist, MediaFile.Title FROM MediaFile RIGHT OUTER JOIN #TempArtistTitle
ON MediaFile.Title = #TempArtistTitle.Title AND MediaFile.Artist = #TempArtistTitle.Artist
ORDER BY Artist, Title, DiscNo
Drop TABLE #TempArtistTitle
GO
See, if the first 3 characters of the disc number is the same, it is the same manufacturer. This query works somewhat, although it returns records that the discnumber is unique too. Like below, the LG disc number shouldn't be returned, as there is only one record for that artist/title.
SC8151-10 - Garth Brooks - Friends In Low Places
SC8125-04 - Garth Brooks - Friends In Low Places
LG5003-07 - Garth Brooks - Friends In Low Places
Could someone help me please?
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Aug 3, 2006
I am writing a script to create a audit trigger on any table. I am getting duplicate rows inserted into my audit table, only for the primary key columns. Anybody see why?
Right now I am debugging an Insert, so I think you can ignore the "U" update part of the Where clause.
....starts with other code to determine columns and primary key fields for selected table....
--get number of columns
select
@rowId = min(RowId),
@MaxRowId = max(RowId)
from #tblFieldNames
-- Loop through fields and build Sql string
while @RowId <= @MaxRowId
BEGIN
SELECT @fieldname = colName FROM #tblFieldNames WHERE RowId = @RowId
SELECT @sql = 'insert tblAuditAdmin (TableAltered, [Action], FieldName, OldValue, NewValue, UpdateDate, UpdateNumber, UserName)'
SELECT @sql = @sql + ' select distinct''' + @TableName + ''''
SELECT @sql = @sql + ',''' + @TriggerType + ''''
SELECT @sql = @sql + ',''' + @fieldname + ''''
SELECT @sql = @sql + ',convert(varchar(1000),d.' + @fieldname + ')'
SELECT @sql = @sql + ',convert(varchar(1000),i.' + @fieldname + ')'
SELECT @sql = @sql + ',''' + @UpdateDate + ''''
SELECT @sql = @sql + ', 1'
SELECT @sql = @sql + ',''' + @UserName + ''''
SELECT @sql = @sql + ' FROM #ins i FULL OUTER JOIN #del d'
SELECT @sql = @sql + @pkJoinClause
SELECT @sql = @sql + ' WHERE (''' + @TriggerType + ''' = ''I'')'
SELECT @sql = @sql + ' OR (''' + @TriggerType + ''' = ''D'')'
SELECT @sql = @sql + ' OR (''' + @TriggerType + ''' = ''U'' AND '
SELECT @sql = @sql + '((i.' + @fieldname + ' <> d.' + @fieldname + ')'
SELECT @sql = @sql + ' OR (''' + @fieldname + ''' in (Select colName from #primaryKeyFields))'
SELECT @sql = @sql + ' OR (i.' + @fieldname + ' IS NULL AND d.' + @fieldname + ' is NOT null)'
SELECT @sql = @sql + ' OR (i.' + @fieldname + ' IS NOT NULL AND d.' + @fieldname + ' is null)))'
EXEC (@sql)
set @RowId = @RowId + 1
END
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Jun 29, 2006
I have a db that has duplicate customer records.
If I run the following select statment against the appropriate table it returns the duplilcate records in the result set. However, from this list I want to add an additional select statement embedded into the query that will actually return only those records with the most current syscreated date.
Example of script I'm using---
select cmp_fadd1, syscreated, cmp_name, cmp_code
from cicmpy
where cmp_fadd1 in (select cmp_fadd1
from cicmpy
group by cmp_fadd1
having count(1) = 2)
order by cmp_fadd1,syscreated desc
The results is:
Address Syscreated date Customer
1622 ONTARIO AVENUE 2005-06-15 22:19:45.000 RELIABLE PARTSLTD
1622 ONTARIO AVENUE 2004-01-22 18:10:05.000 RELIABLE PARTS LTD
PEI CENTER 2006-01-05 22:03:50.000 P.G. ENERGY
PEI CENTER 2004-01-22 17:57:56.000 P.G. ENERGY
From this I want to be able to select ONLY those records with the most current syscreated date or those records with 2005-06-15 and 2006-01-05
Can anyone help me with creating this?
Thanks
Cyndie
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Oct 22, 2014
I have a table with 22 million Business records. I can see that there are duplicates when I group by BusinessName and Address and Phone. I'd like to place only the duplicates into a table, with a ranking, oldest business key gets a ranking of 1.
As a bonus I'd like each group to have a distinct group name (although not necessary, just want to know how to do this)
Later after I run more verifications to make sure these are not referenced elsewhere I'll delete everything with a matchRank > 1 out of the main Business table.
DROP TABLE [dbo].[TestBusiness];
GO
CREATE TABLE [dbo].[TestBusiness](
[Business_pk] INT IDENTITY(1,1) NOT NULL,
[BusinessName] VARCHAR (200) NOT NULL,
[Address] VARCHAR(MAX) NOT NULL,
[code]....
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Jan 26, 2015
Is there a query or a way to convert duplicates value in a column to non duplicates.
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Mar 2, 2006
I need some help.
I have created a database that looks like the following:
FirstName Table link to Main Table.
I have created a Stored procedure that looks like this:
Create procedure dbo.StoredProcedure
(
@FirstName varchar(20)
)
Declare FirstNameID int
Insert Into Main Table
(
FirstName
)
Values
(
@FirstName
)
Select @FirstNameID = Scope_Identity()
How could I redesign this to check if a value exists and if it exists then simply use that value instead of creating a new duplicate value?
Thanks!!
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Jun 27, 2001
I have a dilema..... I have a databas eof about 60,000 users and i need to get rid of those users where there is a duplicate email address. I have written an asp utilty that works but is far too taxing on our little server and i thinkk itwill kill it. what it does is for each email address it compares it against all the others.... so for each address it checks against 60,000 other records 60,000 times.... you know what i mean. its pretty phucked.... i tested it on just one record and took about 5mins.
anyway ive been trying to do it in SQL with no luck
here is a simplified version of my dilema
*****
NAMEEMAILAGE
tomtom@mail23
tombomb tom@mail23
petepete@email23
davecool@mail21
stevesteve@mail17
marycool@mail89
thomas tom@mail13
richrich@mail65
richdick@mail65
tomtom@mail23
tomtom@mail23
so what i want to do is cut it down so there are no duplicate email addresses. I want the table looking like this:
*****
NAMEEMAILAGE
tomtom@mail23
petepete@email23
davecool@mail21
stevesteve@mail17
richrich@mail65
richdick@mail65
Can you think of a way to do this?
i tried the following but it gets rid of duplicates of other fields which is not what i want to do
CREATE table distinct_records
SELECT name, Email, Age
FROM duplicate_records
GROUP BY name, Email, Age;
any ideas guys?
thanks
tom.harrow@netpoll.net
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Nov 7, 2005
i've imported a number of spreadsheets into a database
the schema is
directoryid firstname, lastname, extension
703168 Andrew Lim 78094
703154 Joseph Egan 78888
704548 Andrew Lim 78094
I realized the spreadsheet had a large number of duplicates. How can i delete the duplicates ?
like deleting directoryid 703168 only.
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Nov 9, 2005
i'm trying to get duplicates out of the my database
SELECT COUNT(*) AS Amount,
Firstname,
surname,
Internalextension
FROM iac.dbo.sf_profil
GROUP BY FirstName, surname, internalextension
HAVING COUNT(*) > 1 order by firstname, surname
How do i alter the query just retrieve records which have firstname and lastname which are similar but different extension numbers ?
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May 8, 2008
Hi,
This is the query which shows me the duplicates
Some of the records have more than one records
I would like to know how to delete the extra records so that I will end up with one record per row.
select
Pricing_Source,
VaR_Identifier,
Price_Date,
PX_Last,
Count(*) as 'count'
from
tblPricesClean
group by
Pricing_Source,
VaR_Identifier,
Price_Date,
PX_Last
having count(*) > 1
order by
count desc
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Jun 13, 2008
Hi,
Is there a way to find duplicates in one field? For example my query has person_nbr and for each person_nbr on one day they could have used multiple payer_names. I want to be able to count each person_nbr one time but also I want to group by description(which is the name of the provider) and by payer name to see how many person's that the provider seen with each payer. My problem is that if the person had more than one payer they are counted twice. Is there some type of aggregate function to use the first payer in the list??
With PersonMIA (person_id,person_nbr,first_name,last_name,date_of_birth) as
(
select distinct person_id,person_nbr,first_name,last_name,date_of_birth from
(select count(*) as countenc,a.person_id,a.person_nbr,
a.first_name,a.last_name,
a.date_of_birth
from person a
join patient_encounter b on a.person_id = b.person_id
group by a.person_id,a.person_nbr,a.first_name,a.last_name,a.date_of_birth )tmp
where tmp.countenc <=1
)
select person_nbr,payer_name,first_name,last_name,description,year(create_timestamp),create_timestamp
from
(
select distinct c.description,tmp.person_id,tmp.person_nbr,tmp.first_name,
tmp.last_name,tmp.date_of_birth,d.payer_name,b.create_timestamp
from PersonMIA tmp
join person a on a.person_id = tmp.person_id
join patient_encounter b on a.person_id = b.person_id
join provider_mstr c on b.rendering_provider_id = c.provider_id
join person_payer d on tmp.person_id = d.person_id
where c.description = 'Leon MD, Enrique'
group by c.description,tmp.person_id,tmp.person_nbr,tmp.first_name,tmp.last_name,
tmp.date_of_birth,d.payer_name,b.create_timestamp
)tmp2
where year(create_timestamp) IN (2005,2006)
group by person_nbr,payer_name,first_name,last_name,description,create_timestamp
Thanks in Advance!
Sherri
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May 10, 2006
Hi,
I'll see if I can explain this clearly. The query below
selects rows from the "hdr_ctl_nbr_status" table if the value in the field "tcn" from that table is found in the table "temp_tcn". I want all fields from the "hdr_ctl_nbr_status" table to be selected BUT only one row. In other words for a tcn with a value "12345678" there are 10 rows returned from the hdr_ctl_nbr_status table, I want only 1. Is there a way I can use SELECT DISTINCT to do this ? I know this usually functions on one or more fields but I want the DISTINCT to be on tcn only BUT return all fields in the query.
Select h.*,'' from hdr_ctl_nbr_status as h WITH (NOLOCK)
where h.tcn in (select tcn from temp_tcn)
Thanks, sorry if this is too confusing. Jeff
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Mar 10, 2008
Hi, All,
I have two columns of int data in the a table, as my example data shows below.
I want my data returned to be something like those in #test3, but my question is this, how can I do it without using #test2 and #test3?
By the way, the business requirement doesn't care it's min/max or any ID when one side has duplicated values.
Thanks!
Use tempdb
Go
if object_ID ('#test') is not null drop table #test
create table #test (col1 int, col2 int)
insert into #test
Select 123, 222 union
Select 124, 222 union
Select 125, 222 union
Select 111, 223 union
Select 111, 224
if object_ID ('#test2') is not null drop table #test2
create table #test2 (col1 int, col2 int)
Insert into #test2
Select distinct col1, min(col2) from #test group by col1
if object_ID ('#test3') is not null drop table #test3
create table #test3 (col1 int, col2 int)
Insert into #test3
Select min(col1), col2 from #test2 group by col2
Select * from #test3
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Jul 28, 2005
I am attempting to execute the Stored Procedure at the foot of thismessage. The Stored Procedure runs correctly about 1550 times, butreceive the following error three times:Server: Msg 512, Level 16, State 1, Procedure BackFillNetworkHours,Line 68Subquery returned more than 1 value. This is not permitted when thesubquery follows =, !=, <, <= , >, >= or when the subquery is used asan expression.I've done some digging, and the error message is moderatelyself-explanatory.The problem is that there is no Line 68 in the Stored Procedure. It'sthe comment line:-- Need to find out how many hours the employee is scheduled etc.Also, there are no duplicate records in the Employee table nor theWeeklyProfile table. At least I assume so - if the following SQL todetect duplicates is correct!SELECT E.*FROMEmployee Ejoin(select EmployeeIDfromEmployeeGroup by EmployeeIDhaving count(*) > 1) as E2On(E.EmployeeID = E2.EmployeeID)SELECTW.*FROMWeekProfile Wjoin(SelectWeekProfileIDFROMWeekProfileGROUP BYEmployeeID, MondayHours, WeekProfileIDHAVING COUNT(*) > 1) AS W2ONW.WeekProfileID = W2.WeekProfileIDNOTE: In the second statement, I have tried for MondayHours thruFridayHours.Anyone got any ideas? The TableDefs are set up in this thread:<http://groups-beta.google.com/group/comp.databases.ms-sqlserver/browse_frm/thread/fff4ef21e9964ab8/f5ce136923ebffc3?q=teddysnips&rnum=1&hl=en#f5ce136923ebffc3>The Stored Procedure that causes the error is here:--************************************************** ***********CREATE PROCEDURE BackFillNetworkHoursASDECLARE @EmployeeID intDECLARE @TimesheetDate DateTimeDECLARE @NumMinutes intDECLARE @NetworkCode int-- Get the WorkID corresponding to Project Code 2002SELECT@NetworkCode = WorkIDFROM[Work]WHERE(WorkCode = '2002')-- Open a cursor on a SELECT for all Network Support Employees whereany single workday comprises fewer than 7.5 hoursDECLARE TooFewHours CURSOR FORSELECTEmployeeID,CONVERT(CHAR(8), Start, 112) AS TimesheetDate,SUM(NumMins) AS TotalMinsFROM(SELECTTI.EmployeeID,W.WorkCode,TI.Start AS Start,SUM(TI.DurationMins) AS NumMinsFROMTimesheetItem TI LEFT JOIN[Work] W ON TI.WorkID = W.WorkIDWHERE EXISTS(SELECT*FROMEmployee EWHERE((TI.EmployeeID = E.EmployeeID) AND(E.DepartmentID = 2)))GROUP BY TI.EmployeeID, TI.Start, W.WorkCode) AS xGROUP BYEmployeeID,CONVERT(char(8), Start, 112)HAVINGSUM(NumMins) < 450ORDER BYEmployeeID,CONVERT(CHAR(8), Start, 112)-- Get the EmployeeID, Date and Number of Minutes from the cursorOPEN TooFewHoursFETCH NEXT FROM TooFewHours INTO @EmployeeID, @TimesheetDate,@NumMinutesWHILE (@@FETCH_STATUS=0)BEGINDECLARE @NewWorkTime datetimeDECLARE @TimesheetString varchar(50)DECLARE @Duration intDECLARE @RequiredDuration int-- Set the correct date to 08:30 - by default the cast from thecursor's select statement is middaySET @TimesheetString = @TimesheetDate + ' 08:30'SET @NewWorkTime = CAST(@TimesheetString AS Datetime)-- Need to find out how many hours the employee is scheduled to workthat day.SET @RequiredDuration = CASE (DATEPART(dw, @NewWorkTime))WHEN 1 THEN(SELECT CAST((60 * SundayHours) AS int) FROM WeekProfile WHERE(EmployeeID = @EmployeeID))WHEN 2 THEN(SELECT CAST((60 * MondayHours) AS int) FROM WeekProfile WHERE(EmployeeID = @EmployeeID))WHEN 3 THEN(SELECT CAST((60 * TuesdayHours) AS int) FROM WeekProfile WHERE(EmployeeID = @EmployeeID))WHEN 4 THEN(SELECT CAST((60 * WednesdayHours) AS int) FROM WeekProfile WHERE(EmployeeID = @EmployeeID))WHEN 5 THEN(SELECT CAST((60 * ThursdayHours) AS int) FROM WeekProfile WHERE(EmployeeID = @EmployeeID))WHEN 6 THEN(SELECT CAST((60 * FridayHours) AS int) FROM WeekProfile WHERE(EmployeeID = @EmployeeID))WHEN 7 THEN(SELECT CAST((60 * SaturdayHours) AS int) FROM WeekProfile WHERE(EmployeeID = @EmployeeID))ENDIF @NumMinutes < @RequiredDurationBEGIN-- Set the Start for the dummy work block to 08:30 + the number ofminutes the employee has already worked that daySET @NewWorkTime = DateAdd(minute, @NumMinutes, @NewWorkTime)-- Set the duration for the dummy work block to be required durationless the amount they've already workedSET @Duration = @RequiredDuration - @NumMinutes-- Now we have the correct data - insert into table.INSERT INTO TimesheetItem(EmployeeID,Start,DurationMins,WorkID)VALUES(@EmployeeID,@NewWorkTime,@Duration,@NetworkCode)ENDFETCH NEXT FROM TooFewHours INTO @EmployeeID, @TimesheetDate,@NumMinutesENDCLOSE TooFewHoursDEALLOCATE TooFewHoursGO--************************************************** ***********ThanksEdward
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Jul 20, 2005
I have a table, TEST_TABLE, with 6 columns (COL1, COL2, COL3, COL4,COL5, COL6).... I need to be able to select all columns/rows whereCOL3, COL4, and COL5 are unique....I have tried using DISTINCT and GROUP BY, but both will only allow meto access columns COL3, COL4, and COL5..... i need access to allcolumns...I just want to get rid of duplicate rows (duplicates ofCOL3, COL4, and COL5)...Thanks in advance.Joe
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Apr 23, 2008
Anyone know how to sum duplicated values so it only sums the distinct values?
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May 21, 2008
I have the following data.
CustID RoleID RelatID StartDate EndDate
20 RIX AGQ 5/05/2007 31/12/9999
20 RIX AGR 10/06/2007 31/12/9999
18 LRS AGQ 3/09/2004 31/12/9999
22 SRT AGP 5/03/2007 31/12/9999
22 SRT AGP 10/03/2007 31/12/9999
I wish to SELECT only the records that have duplicates. So, in the above data example, RoleID of LRS should be excluded.
How to do?
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Feb 12, 2007
Hi!
Grateful for some help as a newbie...
I have a
OLE db SQL command: SELECT DISTINCT convert (char(8),date,112) as day,...etc
Resulting in error "Violation of PRIMARY KEY constraint 'PK_Dim_Date"... so Column Day in Dim_date contains duplicates.
I suppose i need a delete in Lookup or how would I eliminate duplicates in Dim?
DELETE day from dim_date where day in(Select day from date ...
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Feb 25, 2004
I have these two tables and I cant prevent duplicates.
SEARCH
Item
ItemID
Info
CATEGORYDATA
CategoryID
ItemID
SELECT DISTINCT SEARCH.ItemId, SEARCH.Item, CATEGORYDATA.CategoryId
FROM SEARCH
INNER JOIN CATEGORYDATA
ON SEARCH.ItemID = CATEGORYDATA.ItemID
And I get something like:ItemID Item CategoryID
1 item1 1
3 item3 1
1 item1 2 <---duplicate
1 item1 3 <---duplicate
2 item2 3
4 item4 3
Thanks in advance
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Feb 15, 2002
Hello!
Just looking for advise on dealing with duplicates in database.
I have a contact table that have a bunch of duplicated customer records.
My goal is to combine all duplicated records into one record.
This involves couple tables:contact,contact history ,calendar.
All tables related by common column "accountno".
What would be the best approach for this?
Thank you,
Lena
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Apr 17, 2001
Hi,
does anyone out there know how to delete dulicate records in a table? I've looked in BOL and I can't seem to find it. Please advise.
thanks, mark
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Aug 2, 2000
I need to remove the duplicates from a table. If a record exits 4 times in a
table I need to delete 3 records and retain only one occurance of that.
I need a query to do this.
Can anybody help.
-Rajesh
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Sep 5, 2000
Hi,
I need to delete ONLY the duplicate rows from a table..Can anyone suggest me a way to do that thing..i used the query..
"Delete from <TableName> where SlNo IN ( Select SlNo from <TableName> group
by SlNO having Count(*) > 1)"
The resultant is all the original rows also getting deleted with the duplicates..anyone please help me out..
Thank you in advance
Rani
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Jul 26, 2002
I have a customer database with the following structure:
Dept ID (int)
Section (varchar)
I need to find only occurrences of a section (eg Admin) where the section name has a record in Dept 1,2 and 3 - only return the result if the record for Admin is associated will these depts.
Example Data:
Dept Section
1 Admin
1 Finance
1 Marketing
2 Admin
2 Sales
2 Marketing
3 Admin
3 Sales
3 Finance
The query would only return 'Admin' since this is the only Section that is represented in Departments 1,2 + 3.
I am not in control of the data design and can't create a bitwise field to achieve this.
tia,
Steve
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Aug 5, 2002
Hi,
I’m using SQL Server 2000. I have a table called Contacts and I would like to be able to have the UserID as an indexed column and to ignore duplicates. I set up the following properties within my SQL Server database table:
Table Name: Contacts
Selected Index: IX_UserID
Column Name: UserID
Order: Ascending
Create Unique
Index
Ignore Duplicate Key
Every time I try to enter duplicates for the UserID column; I get an error that says, “Cannot enter duplicate key row in object ‘Contacts’. Can anyone explain this? Is it possible to create an index column with duplicate data?
Thanks,
Denise
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Sep 21, 2004
Hey all.
I have a table with 100,000 plus records in it, and some are duplicates. Is there any way to delete one of them and not the other. For instance, if I duplicate the table I could run this query.
<cfquery name="query1" datasource="datasource">
DELETE DISTINCT
FROM tablename
WHERE FirstName in ( SELECT FirstName from tablename1 where tablename1.FirstName = tablename.FIRST_NAME AND tablename1.LastName = tablename.LAST_NAME AND tablename1.State = tablename.STATE)
</cfquery>
However, it doesn't work. I know the distinct is not correct. But does anyone know how to achieve this, I have looked all over, and everything I try deletes both records. I was thinking of using some kindof count statement, but it still deletes both of them. Please help. Thanks
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Jan 27, 2005
I have a members table and have added an extra few thoushand members to it. Now I need to remove the duplicates.
It doesnt matter which duplicate i remove as long as there are unique email addresses.
so here is the format of the table:
id
email
firstname
lastname
datebirth
if i do a:
SELECT COUNT(DISTINCT Email) AS Expr1
FROM Customer
it returns 21345
and
SELECT Count(Email)
FROM Customer
returns 28987
I can get the unique email addresses into another table by going:
SELECT DISTINCT emailaddress INTO DistinctCustomer
FROM Customer
but this will only return unique email addresses. How do i select distinct email address and all other fields into a new table? or just remove duplicates where email address appears more then once?
Thanks in advance
Tom the SQL beginner
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Jul 7, 2004
I am trying to complete an insert from query but the problem is I have duplicates, so I'm getting an error message. So to correct it I am creating a Find Duplicates statement in the Query analyzer but Its not working can someone tell me whats wrong with this statement (by the way I'm in SQL 2000 Server)
thank you
SELECT EmployeeGamingLicense [TM#]AS [TM# Field], Count([TM#])AS NumberOfDups
FROM TERMINATION
GROUP BY [TM#]
HAVING Count([TM#])>1;
GO
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Oct 22, 2004
Can some kind person out there please help me, I've been stuck on this for daaaa-y-s.
I have a database that allows users to search for pdf's of technical drawings.
Basically I have one huge table with multiple columns, which the user can only search on any combination of one of these two columns
"drawing_series" eg 0100, 0046, 1000
"drawing_number" eg 0076000, 0000123, 0000004
There is also a Revision column(which the user can't see) that goes up by 1 each time a drawing has been modified and resubmitted to the database.
"revision" eg 01, 02, 03, ....... 99
So a search on 0046 series might pull back drawings
0046-0010000-01
0046-0010000-02
0046-0010000-03
0046-0076000-01
0046-0076888-01
0046-0076888-02
The problem is that I only want drawings with the highest revisions returned eg
0046-0010000-03
0046-0076000-01
0046-0076888-02
The code below worked like a charm in the test stages pulling back a few hundred records but now that i've uploaded 10's of thousands of records to the DB the whole lot dies if the search result pulls back more than a few thousand records.
SELECT * FROM dbo.Drawing_Database
where dbo.Drawing_Database.revision=(select max(revision) from dbo.Drawing_Database self where self.drawing_series + self.drawing_number = dbo.Drawing_Database.drawing_series + dbo.Drawing_Database.drawing_number) Drawing_Series like '0046' order by Drawing_Series, Drawing_Number
There must be a simpler way of doing this as i can pull out duplicate series + numbers using " HAVING Count(*)>1" but dont know where to go from there.
Help!
TheMaster
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