Updating Table - Trigger Duplicate Entries
Jun 12, 2014I got error while updating a table ,duplicate entries and trigger got fired ..so how to debug the trigger to know duplicate record.
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Writting Trigger Or Procedure To Delete Duplicate Entries In A Table?
Sep 3, 2007I am using Sql Server 2000.
I have a customer table with fields - CustId, Name, Address, City, StdCode, Phone.
I used to insert entries in this table from an excel file.
One excel file will contain thousands of customer.
In this table combination of StdCode and Phone should not be repeated.
If I do it in my VB.Net coding.then application gets drastically slow.
So I want to write a procedure or trigger for this.
Here what I will do, I will send all records into database then this trigger or procedure will check for
any existing entry of combination of StdCode and phone. If entry exists then this will delete new entry
or will not allow this new entry.
Is this possible to do using Trigger or stored procedure?
Duplicate Entries In The Resulting Table
Sep 20, 2007Hi! I am joining 3 tables in SQL , I am getting the results I want exept it's duplicated. So the resultinmg table fom my stored procedure has 3 rows that have the same bulletin. How do I filter the storedprocedure to output only the rows that don't have duplicate entries for the column 'Bulletin' Thanks.
Here is my stored procedure:PROCEDURE [dbo].[spGetCompBulletins]
@Userid uniqueidentifier OUTPUT,@DisplayName varchar(200)
AS
SELECT *
FROM dbo.UserProfile INNER JOIN
dbo.bulletins ON dbo.UserProfile.UserId = dbo.bulletins.Userid INNER JOINdbo.Associations ON dbo.Associations.BusinessID = dbo.bulletins.Userid WHERE UserProfile.DisplayName=@DisplayName
and Userprofile.Userid = @Userid ORDER BY Bulletins.Bulletin_Date
Return
Prevent Duplicate Entries In A Table
Nov 11, 2003I have an ASP.Net Web appplication with a Back-End SQL DB. There are 3 Tables; Users, Groups, and GroupMember.
The GroupMember table is used to link Users to Groups and consists of just two fields; userID and GroupID.
Here is a sample of some data:
User1 Group1
User1 Group2
User2 Group2
User3 Group1
User3 Group3
Users can belong to multiple Groups. However, you shouldn't be able to have the same user and group comobination more than once. for example:
User1 Group1
User2 Group2
User1 Group1
I can stop this kind of duplicate data entry by doing a lookup first (using asp.net) to see if the entry already exists but this seems cumbersome.
Is there a simpler way to prevent duplicate entries in a table using sql?
Thanks a lot,
Chris
Truncating Duplicate Entries In A Table
Sep 18, 2007Hi,
I have a table with no primary key and i just want to see all the duplicate entries on the basis of two columns. Can anyone suggest me how should i go about it.
Can anyone provide me the syntax for the same?
I have only 1 table say ISSR_TBL and two columns using which i want to delete the duplicate ones. i.e. MIN and MAX.
Please help me out...
Transact SQL :: Find All Duplicate Entries In Table
Jun 11, 2015Someone 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
Trigger Is Deleting Entries In Audit Table?
Aug 30, 2013The following is the trigger which create a row in the audit table when a single deletion is occurred.
ALTER TRIGGER [dbo].[TRG_Delete_tbl_attendance]
ON [dbo].[tbl_attendance]
AFTER DELETE
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
[code]....
I am trying to create a trigger which should prevent the bulk deletion. The following is the trigger which I have written, it is preventing the bulk deletion. But the problem is, it is removing the single deletion entries in the audit table. I want audit table to hold back the single deletion entries without allowing the bult deletion
ALTER TRIGGER [dbo].[TRG_Delete_Bulk_tbl_attendance]
ON [dbo].[tbl_attendance]
AFTER DELETE
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
[code]....
Trigger - Require Help For Updating A Trigger Following An INSERT On Another Table
Oct 30, 2007Table 1
First_Name
Middle_Name
Surname
John
Ian
Lennon
Mike
Buffalo
Tyson
Tom
Finney
Jones
Table 2
ID
F
M
S
DOB
1
Athony
Harold
Wilson
24/4/67
2
Margaret
Betty
Thathcer
1/1/1808
3
John
Ian
Lennon
2/2/1979
4
Mike
Buffalo
Tyson
3/4/04
5
Tom
Finney
Jones
1/1/2000
I want to be able to create a trigger that updates table 2 when a row is inserted into table 1. However I€™m not sure how to increment the ID in table 2 or to update only the row that has been inserted.
Trigger - Require Help For Updating A Trigger Following An INSERT On Another Table
Feb 5, 2008A
ID
Name
1
Joe
2
Fred
3
Ian
4
Bill
B
ID
1
4
I want to be able to create a trigger so that when a row is inserted into table A by a specific user then the ID will appear in table B. Is it possible to find out the login id of the user inserting a row?
I believe the trigger should look something like this:
create trigger test_trigger
on a
for insert
as
insert into b(ID)
select i.id
from inserted i
where
--specific USER
Duplicate Entries
Mar 28, 2006I'm extracting data from a log (log_history) of patients where nurses perform various actions on a call, such as assessing and reassessing, despatching etc. This is the script:
Select
L.URN,
LH.THE_TIMESTAMP,
LH.ACTION_TYPE,
LH.ACTION_BY,
LH.ACTION_REQD,
LH.NOTE,
em.position_type_ref
From
LOG L
Join Log_history LH on (L.URN = LH.LOG_URN)
left outer join employee em on (em.code = LH.action_by)
Where
(L.Taken_at >= :DateFrom and L.Taken_at <= :DateTo) and (LH.ACTION_TYPE = 'D') and (em.position_type_ref ='NU')
Order By
L.URN ASC, LH.THE_TIMESTAMP DESC
The result I get shows duplicate 'timestamp' entries and I only want to return unique timestamp entries. Does anyone have any ideas. I'm self taught and have hit a wall
Duplicate Entries
Feb 7, 2007I have an application that allows the user to enter data into a table. There are multiple users so I put in some code that, I thought, would keep 2 users from creating a new record at the same time. The IDs for the records are identical and this is causing a problem.
The IDs are in the format of ####-mmyy. at the start of each month the #### part goes back to 1.
We tried a test today where we had 2 users click on the New button at exactly the same time. The IDs that were created were identical. Is there anyway on the database that I can prevent this from happening?
Here is how I create the new record id:
I get the MAX(ID) from the table
I add 1 to the ID and then insert a new record with the new ID into the table.
Any help is appreciated.
Thanks,
enak
Duplicate Entries
Sep 14, 2007
I have an issue where certain parts of data are repeated several times after i create my query. Without providing my SQL code for now could anyone suggest possibly the main reason(s) for data being duplicated?
Thanks
Trigger Updating Same Table
Mar 18, 2003Hi,
I have a Insert / Update Trigger on Table called TBL_A. Inside the trigger I am updating the same table TBL_A.
Will this cause recursion of the trigger? And will it keep on firing again and again?
Thanks in advance ...jfk
Remove Duplicate Entries
May 8, 2008
I am a newb at ms sql and was hoping someone could help me
eliminate duplicate PRODUCT.PRODUCT from this statement. I have tried using DISTINCT with the same results.The ProductImage table is causing this because
the duplicates are from the PRODUCT.PRODUCT that have more than 1 image.
If anyone could rewrite this statement so I can learn from this, it would
be most appreciated!
Thank you for your time
<asp:SqlDataSource ID="SqlDataSource3" runat="server"ConnectionString="<%$ ConnectionStrings:LocalSqlServer %>"SelectCommand="SELECT Product.Product.productid,Product.Product.catid,Product.Product.name,Product.Product.smalltext,Product.Product.longtext,Product.Product.price,Product.ProductSpecial.saleprice, Product.ProductSpecial.feature,Product.ProductImage.imgId, Product.ProductImage.imgUrlFROM Product.ProductINNER JOIN Product.ProductSpecialON Product.ProductSpecial.productid = Product.Product.productidINNER JOIN Product.ProductImageON Product.Product.imgid = Product.ProductImage.imgId"></asp:SqlDataSource>
Duplicate Entries In A Field
Feb 29, 2000I have a field called RegId. RegId is of datatype NVARCHAR (20).
RegId
-----
12322
2122111
23423
etc
etc
I want to run a query to find out if there are duplicate entries in this field.
Any ideas on how I can achieve this?
Thanks in advance,
Anthony
Dont Sum Duplicate Entries
Jan 2, 2008
Hi.
I have a table with Login and Logoff Time of users, but there could be duplicate Logtimes in the dataset, but for
different products. Because of this I cant do a distinct in the dataset. I need the Product and some other details in my Report.
I tried to make two datasets. One for the Select distinct and one for the other.
But the Problem is:
in my report, I need a table, where I make the Sum of the Logintime a day and in another column I calculate with data from the other dataset.(Logtime + data from dataset2). But this doesnt work, so I think, that is it not possible to join 2 dataset in one table.
datetime Login | datetime Logout | Product
11.12.2007 10:15 | 11.12.2007 12:15 | p1
11.12.2007 10:15 | 11.12.2007 12:15 | p2
11.12.2007 12:19 | 11.12.2007 15:15 | p2
Is there another option I can do this?
Trigger For Updating Value On One Table When That Value Is Updated On Base Table
Jul 30, 2015If the id1 will change in table1 it should also change the corresponding id1 field in table2 it does not do anything.
CREATE TRIGGER [dbo].[IDCHANGE]
ON [dbo].[table1]
AFTER UPDATE
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
[Code] .....
Preventing Duplicate Database Entries
Jan 31, 2006Hi all.. I've been scouring the forums for about 6 hours to no
avail. This is a really simple question. I'm trying to have
a registration page that lets the user input name, email, desired
username, and password. I want to check the username and email
fields to make sure ppl cannot sign up twice. So from what I've
gathered I have a couple of options:
1) i can set up a unique constraint on the database columns,
2) i can run a select statement before inserting,
3) i can store the whole database column in a variable then search through it.
My question is how to do option 2? All of my transactions are through a sqldatasource object in c#.
Check For Duplicate Entries In One Field
Oct 17, 2005Obviously, I'm a complete n00b at SQL.
I have a table in Access 2003 with about 6,000 records and there are about 20 records that have duplicate data in the first field (CompID).
I'm trying to make the first field my primary key, so I need to fix these duplicate entry.
I could export to Excel and fix the problem that way, but in the interest of learning SQL I want to figure out how to do it properly.
Thanks in advance for what is hopefully a simple answer.
Duplicate Entries In Returned SQL Field
Jan 3, 2007Hi All !
Below is a snippet of MS SQL inside ASP that retieves
Commodity info such as product names and related information and returns the results in an ASP Page. My problem is that with certain searches, elements returned in the synonym field repeat. For instance, on a correct search I get back green, red, blue, and yellow which is correct. On another similar search different commodity say for material, I get Plastic, Glass,Sand - Plastic, Glass,Sand - Plastic Glass Sand. I want to remove the repeating elements returned in this field. I hope this makes sense.
PS I tried to use distinct but with no luck I want just one of each in the example below.
Thanks in Advance!
Scott
==============================
SQL = ""
SQL = "SELECT B.CIMS_MSDS_NUM," & _
"A.COMMODITY_NUMBER, " & _
"B.CIMS_TRADE_NME," & _
"B.CIMS_MFR_NME," & _
"B.CIMS_MSDS_PREP_DTE," & _
"B.APVL_CDE," & _
"COALESCE(C.REGDMATLCD,'?') AS DOTREGD," & _
"COALESCE( D.CIMS_TRADE_SYNM,'NO SYNONYMS') AS SYNONYM, " & _
"A.MSDS_CMDTY_VERIF, " & _
"A.CATALOG_ID " & _
"FROM ( MATEQUIP.VMSDS_CMDTY A " & _
" RIGHT OUTER JOIN MATEQUIP.VCIMS_TRD_PROD_INF B " & _
" ON A.CIMS_MSDS_NUM = B.CIMS_MSDS_NUM " & _
" LEFT OUTER JOIN MATEQUIP.VDOT_TRADE_PROD C " & _
" ON A.CIMS_MSDS_NUM = C.MSDSNUM " & _
" LEFT OUTER JOIN MATEQUIP.VCIMS_TRD_PROD_SYN D " & _
" ON B.CIMS_MSDS_NUM = D.CIMS_MSDS_NUM) "
SQL1 = ""
SQL1 = SQL
SQL = SQL & "WHERE " & Where & " "
==================================
Here is a piece of the problem field, note repeating colors etc.
CCM-PAINTS & COATINGS (1/26/98)F65E36 ORANGE F65W1 GLOSS WHITEF65B50 WR. IRON FLAT BLACK F65R2 TARTAR RED DARKF65B4 SEMI-GLOSS BLACK F65R1 VERMILIONF65B1 GLOSS BLACK F65N11 RICH BROWNF65A49 ASA #49 GRAY F65M1 MAROONF65A4 MACHINE TOOL GRAY F65L10 BRIGHT BLUEF65A2 LIGHT GRAY F65L7 PALE BLUEF65A1 WARM GRAY F65L6 TURQUOISEF65L4 DARK BLUEF65L3 LIGHT BLUE V65V100 MIXING CLEARF65H1 IVORY F65Y48 LIGHT YELLOWF65G41 FOREST GREEN F65Y44 LEMON YELLOWF65G40 MEDIUM GREEN F65W100 MIXING WHITEF65G39 LIGHT GREEN F65W4 TINTING WHITEF65G16 SEMI-GLOSS MACHINERY GRE F65W3 CUSTOM WHITEF65E37 INTERNATIONAL ORANGE F65W2 SEMI-GLOSS WHITEF65B50 WR. IRON FLAT BLACK F65R2 TARTAR RED DARKF65B4 SEMI-GLOSS BLACK F65R1 VERMILIONF65B1 GLOSS BLACK F65N11 RICH BROWNF65A49 ASA #49 GRAY F65M1 MAROONF65A4 MACHINE TOOL GRAY F65L10 BRIGHT BLUEF65A2 LIGHT GRAY F65L7 PALE BLUEF65A1 WARM GRAY F65L6 TURQUOISEDISAPPROVED BY CCM-PAINTS & COATINGS (1/26/98)F65L4 DARK BLUEF65L3 LIGHT BLUE V65V100 MIXING CLEARF65H1 IVORY F65Y48 LIGHT YELLOWF65G41 FOREST GREEN F65Y44 LEMON YELLOWF65G40 MEDIUM GREEN F65W100 MIXING WHITEF65G39 LIGHT GREEN F65W4 TINTING WHITEF65G16 SEMI-GLOSS MACHINERY GRE F65W3 CUSTOM WHITEF65E37 INTERNATIONAL ORANGE F65W2 SEMI-GLOSS WHITEF65E36 ORANGE F65W1 GLOSS WHITEDISAPPROVED BY CCM-PAINTS & COATINGS (1/26/98)F65A2 LIGHT GRAY F65L7 PALE BLUEF65A1 WARM GRAY F65L6 TURQUOISEF65B4 SEMI-GLOSS BLACK F65R1 VERMILIONF65B1 GLOSS BLACK F65N11 RICH BROWNF65A49 ASA #49 GRAY F65M1 MAROONF65A4 MACHINE TOOL GRAY F65L10 BRIGHT BLUEF65L4 DARK BLUEF65L3 LIGHT BLUE V65V100 MIXING CLEARF65H1 IVORY F65Y48 LIGHT YELLOWF65G41 FOREST GREEN F65Y44 LEMON YELLOWF65G40 MEDIUM GREEN F65W100 MIXING WHITEF65G39 LIGHT GREEN F65W4 TINTING WHITEF65G16 SEMI-GLOSS MACHINERY GRE F65W3 CUSTOM WHITEF65E37 INTERNATIONAL ORANGE F65W2 SEMI-GLOSS WHITEF65E36 ORANGE F65W1 GLOSS WHITEF65B50 WR. IRON FLAT BLACK F65R2 TARTAR RED DARKF65A1 WARM GRAY F65L6 TURQUOISEDISAPPROVED BY CCM-PAINTS
Finding Duplicate Entries (with Different Keys)
Feb 8, 2007Yet another simple query that is eluding me. I need to find records in a table that have the same first name and last name. Because the table has a primaty key, these people were entered twice or they share the same first and last name.
How could you query this:
ID fname lname
10001 Bill Jones
10002 Joe Smith
10003 Sue Jenkins
10004 John Sanders
10005 Joe Smith
10006 Harrold Simpson
10007 Sue Jenkins
10008 Sam Worden
and get a result set of this:
ID fname lname
10002 Joe Smith
10005 Joe Smith
10003 Sue Jenkins
10007 Sue Jenkins
Stop Inserting Duplicate Entries
Sep 10, 2007Hi I am trying to insert entries in a table which has a composite primary key and i am inserting it on UID basis.
INSERT INTO TABLE_B (TABLE_B_UID,NUM_MIN, NUM_MAX,BIN, REGN_CD, PROD_CD, CARD)
(SELECT UID,LEFT(NUM_MIN,16),LEFT(NUM_MAX,16),BIN, REGN_CD, PROD_CD, CARD FROM TABLE_A WHERE UID NOT IN (SELECT TABLE_B_UID FROM TABLE B))
When i insert it tries to insert a duplicate entries and gives me an error. Since I am new to SQL SERVER 2000 i need some help. I tried IF NOT EXISTS, EXCEPT but i guess i am wrong at the syntax.
Can anybody help me out?
How Can I Remove Duplicate Entries In A Sql Query?
Mar 2, 2006I have a database being populated by hits to a program on a server.The problem is each client connection may require a few hits in a 1-2second time frame. This is resulting in multiple database entries -all exactly the same, except the event_id field, which isauto-numbered.I need a way to query the record w/out duplicates. That is, anyrecords exactly the same except event_id should only return one record.Is this possible??Thank you,Barry
View 14 Replies View RelatedRemoving Duplicate Entries In SQL Field
Jan 3, 2007Hi All,
Below is a snippet of MS SQL inside some VB that retieves
Commodity info such as product names and related information and returns the results in an ASP Page. My problem is that with certain searches, elements returned in the synonym field repeat. For instance, on a correct search I get green, red, blue, and yellow which is correct. On another similar search with different commodity say for material, I get Plastic, Glass,Sand - Plastic, Glass,Sand - Plastic, Glass, Sand. I want to remove the repeating elements returned in this field. IOW, I just need one set of Plastic, Glass and Sand. I hope this makes sense.
Below is the SQL and the results from the returned page.
PS I tried to use distinct but with no luck I want just one of each in the example below.
Thanks in Advance!
Scott
==============================
SQL = ""
SQL = "SELECT B.CIMS_MSDS_NUM," & _
"A.COMMODITY_NUMBER, " & _
"B.CIMS_TRADE_NME," & _
"B.CIMS_MFR_NME," & _
"B.CIMS_MSDS_PREP_DTE," & _
"B.APVL_CDE," & _
"COALESCE(C.REGDMATLCD,'?') AS DOTREGD," & _
"COALESCE( D.CIMS_TRADE_SYNM,'NO SYNONYMS') AS SYNONYM, " & _
"A.MSDS_CMDTY_VERIF, " & _
"A.CATALOG_ID " & _
"FROM ( MATEQUIP.VMSDS_CMDTY A " & _
" RIGHT OUTER JOIN MATEQUIP.VCIMS_TRD_PROD_INF B " & _
" ON A.CIMS_MSDS_NUM = B.CIMS_MSDS_NUM " & _
" LEFT OUTER JOIN MATEQUIP.VDOT_TRADE_PROD C " & _
" ON A.CIMS_MSDS_NUM = C.MSDSNUM " & _
" LEFT OUTER JOIN MATEQUIP.VCIMS_TRD_PROD_SYN D " & _
" ON B.CIMS_MSDS_NUM = D.CIMS_MSDS_NUM) "
SQL1 = ""
SQL1 = SQL
SQL = SQL & "WHERE " & Where & " "
==================================
Here is a piece of the problem field, note repeating colors etc.
CCM-PAINTS & COATINGS (1/26/98)F65E36 ORANGE F65W1 GLOSS WHITEF65B50 WR. IRON FLAT BLACK F65R2 TARTAR RED DARKF65B4 SEMI-GLOSS BLACK F65R1 VERMILIONF65B1 GLOSS BLACK F65N11 RICH BROWNF65A49 ASA #49 GRAY F65M1 MAROONF65A4 MACHINE TOOL GRAY F65L10 BRIGHT BLUEF65A2 LIGHT GRAY F65L7 PALE BLUEF65A1 WARM GRAY F65L6 TURQUOISEF65L4 DARK BLUEF65L3 LIGHT BLUE V65V100 MIXING CLEARF65H1 IVORY F65Y48 LIGHT YELLOWF65G41 FOREST GREEN F65Y44 LEMON YELLOWF65G40 MEDIUM GREEN F65W100 MIXING WHITEF65G39 LIGHT GREEN F65W4 TINTING WHITEF65G16 SEMI-GLOSS MACHINERY GRE F65W3 CUSTOM WHITEF65E37 INTERNATIONAL ORANGE F65W2 SEMI-GLOSS WHITEF65B50 WR. IRON FLAT BLACK F65R2 TARTAR RED DARKF65B4 SEMI-GLOSS BLACK F65R1 VERMILIONF65B1 GLOSS BLACK F65N11 RICH BROWNF65A49 ASA #49 GRAY F65M1 MAROONF65A4 MACHINE TOOL GRAY F65L10 BRIGHT BLUEF65A2 LIGHT GRAY F65L7 PALE BLUEF65A1 WARM GRAY F65L6 TURQUOISEDISAPPROVED BY CCM-PAINTS & COATINGS (1/26/98)F65L4 DARK BLUEF65L3 LIGHT BLUE V65V100 MIXING CLEARF65H1 IVORY F65Y48 LIGHT YELLOWF65G41 FOREST GREEN F65Y44 LEMON YELLOWF65G40 MEDIUM GREEN F65W100 MIXING WHITEF65G39 LIGHT GREEN F65W4 TINTING WHITEF65G16 SEMI-GLOSS MACHINERY GRE F65W3 CUSTOM WHITEF65E37 INTERNATIONAL ORANGE F65W2 SEMI-GLOSS WHITEF65E36 ORANGE F65W1 GLOSS WHITEDISAPPROVED BY CCM-PAINTS & COATINGS (1/26/98)F65A2 LIGHT GRAY F65L7 PALE BLUEF65A1 WARM GRAY F65L6 TURQUOISEF65B4 SEMI-GLOSS BLACK F65R1 VERMILIONF65B1 GLOSS BLACK F65N11 RICH BROWNF65A49 ASA #49 GRAY F65M1 MAROONF65A4 MACHINE TOOL GRAY F65L10 BRIGHT BLUEF65L4 DARK BLUEF65L3 LIGHT BLUE V65V100 MIXING CLEARF65H1 IVORY F65Y48 LIGHT YELLOWF65G41 FOREST GREEN F65Y44 LEMON YELLOWF65G40 MEDIUM GREEN F65W100 MIXING WHITEF65G39 LIGHT GREEN F65W4 TINTING WHITEF65G16 SEMI-GLOSS MACHINERY GRE F65W3 CUSTOM WHITEF65E37 INTERNATIONAL ORANGE F65W2 SEMI-GLOSS WHITEF65E36 ORANGE F65W1 GLOSS WHITEF65B50 WR. IRON FLAT BLACK F65R2 TARTAR RED DARKF65A1 WARM GRAY F65L6 TURQUOISEDISAPPROVED BY CCM-PAINTS & COATINGS (1/26/98)F65B1 GLOSS BLACK F65N11
Best Method Of Checking For Duplicate Entries In SQL Server
Aug 22, 2007Here is my situation. I have a table in my application that pairs users with cars they like. We'll call this table Favorites. A user can browse the site and they can designate as many cars they want as favorites. For example, a user can go to the Honda Accord page and add that as a favorite car and then go to the Toyota Camry page and add that as a favorite car. However, if he/she goes to that Honda Accord page and tries to click the "Add to Favorites" button again, at the present state of my application, it will just add another entry into the Favorites table with a duplicate pairing. So, if I were to datalist the table to generate a listing of all favorites belonging to a certain user, he/she may potentially be returned with superfluous duplicate entries. Not to mention, taking up valuable database space and not looking very professional.
In my Favorites table, the 3 fields are.....favoriteId (set as primary key)userIdcarId
I've been thinking about this for awhile and I've come up with 2 solutions. I'm a newbie to ASP.NET/programming so I don't have enough insight to make a decision or to even think up of other alternatives.
1) Check proactively by doing a.....SELECT favoriteID FROM Favorites WHERE userId = x and carId = y (where x and y are variables)If I get a null return, it means I can go ahead and let the user add the car as a favorite in the database. If I get a valid value, then it means there already exists the same pairing, so I exit out without updating the table.
2) Check reactively by forcing an exception whenever a user tries to enter a duplicate pairing. I'm not sure how to do this, but perhaps, instead of making "favoriteId" a primary key, perhaps, I can make a primary key pairing of "userId" and "carId". And by trying to do an insert with a primary key that already exists, we know it won't work since primary keys by definition are unique.
Now, I expect some concurrent users on my site, so I must take into consideration pros and cons of each and determine which is more efficient. Checking proactively will force a check even if the table does not contain a duplicate pairing of user and car. However, having a duplicate primary key may be more expensive from a database point of view and may slow down lookups, etc. Or maybe neither has significant benefits, in which case, I rather go with proactive, since I've already coded it and it works fine. Or maybe there is a third alternative, which I did not think. Which method do programmers usually take and which is a better practice?
TIA for your help.
Finding Duplicate Entries In A Smart Way - By Comparing First Two Words
Jul 20, 2005What is the best way to compare two entries in a single table wherethe two fields are "almost" the same?For example, I would like to write a query that would compare thefirst two words in a "company" field. If they are the same, I wouldlike to output them.For example, "20th Century" and "20th Century Fox" in the companyfield would be the same.How do I do this? Do I need to use a cursor? Is it as simple as using"Like?"
View 2 Replies View RelatedDelete Duplicate Entries From Tables In My Database Using Query Analyzer
Jun 25, 2004Hello,
How can I delete duplicate entries from tables in my database using Query Analyzer, as there are many duplicate entries in my tables, I want to delete them.
Thanks in advance,
Uday.
SQL Server 2014 :: Find Duplicate Rows Like Same Entries More Than One Time?
Sep 11, 2014i have a table like below
create table staff_attendance
(
attendance_id int,
attendace_date datetime,
staff_id int,
working_year int,
hours int
)
values like
1 2014-06-30 00:00:00.0ST10121
2 2014-06-30 00:00:00.0ST10122
3 2014-06-30 00:00:00.0ST10122 ----same entry like previous one
4 2014-07-01 00:00:00.0ST10121
5 2014-07-01 00:00:00.0ST10122
6 2014-07-02 00:00:00.0ST10121
7 2014-07-02 00:00:00.0ST10122
8 2014-06-30 00:00:00.0ST10221
9 2014-06-30 00:00:00.0ST10222
10 2014-07-01 00:00:00.0ST1022 1
11 2014-07-01 00:00:00.0ST102 22
12 2014-07-02 00:00:00.0ST102 21
13 2014-07-02 00:00:00.0ST102 22
I Need to find the duplicate rows like same entries which is having more than 1 rows.... how do i find?
CREATE TABLE DUPLICATE OBJECT/DUPLICATE FIELD NAME ERROR Msg 2714
Oct 2, 2007Hello 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
Updating A Table By Both Inserting And Updating In The Data Flow
Sep 21, 2006I am very new to SQL Server 2005. I have created a package to load data from a flat delimited file to a database table. The initial load has worked. However, in the future, I will have flat files used to update the table. Some of the records will need to be inserted and some will need to update existing rows. I am trying to do this from SSIS. However, I am very lost as to how to do this.
Any suggestions?
Duplicate Record Trigger
Nov 24, 2006This is part of my trigger on table T1. I am trying to check if the records inserted to T1 is available in myDB.dbo.myTable or not (destination table). If it is available rollback T1. It does not do that although I insert the same records twice.
-- duplicate record check
SET @step = 'Duplicate record'
IF EXISTS (
SELECT i.myID, i.Type
FROM INSERTED i INNER JOIN
myDB.dbo.myTable c ON i.myID = c.myID
GROUP BY i.myID, i.Type
HAVING (COUNT(*) > 1) AND (i.Type = 'In')
)
BEGIN
ROLLBACK transaction
RAISERROR('Error: step: %s. rollback is done.', 16, 1, @step)
Return
END
What is problem?
No Further Entries Of A Value In Table
Mar 30, 2012I have a table which stores phone numbers of a customer in a table.
Say this table is as below
CustomerName - PhoneNumber
Customer 1 - Phone number 1
Customer 2 - Phone number 2
Customer 2 - Phone number 3
Customer 3 - Phone number 4
What would be the best approach to prevent adding another entry against Customer 2. I should be able to add new customers and add multiple phone number against all other Customers. The restriction should be only against Customer 2.
Duplicate A Record Using Update Trigger Question
Jun 1, 2006I am new to SQL and these forums, so please bear with me :)
My basic question is if I can create a update trigger that will pull info from another record in the same table if data in certain fields match the existing record.
An example:
The user creates a new record. If said user enters data in specified fields that matches data in the same fields in another record in the same table, can a update trigger be used to fill out the rest of this record with the data from the record that matches?
If you need more Info on my problem, ask and I will try to explain better. There may be a better way of doing this than using a trigger, but I am not sure. The fields that I would use to match the data would not be the primary key fields.
Thanks!