How To Delete Rows In A Table When No Primary Key Is Defined
Jul 23, 2005
Hello,
I want to delete duplicate rows in a table when no primary key is
defined.
For eg: If we have table1 with data as below,
Suma 23 100
Suma 23 100
I want to delete a row from this table and retain only one row.
I tried deleting self joins and exists operator. But it is deleting
both the rows. I want to retain one row.
Can anybody help me out.
Thanks in advance,
Suma
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May 17, 2007
Hi there,
We're going to use replication on our database. There are tables without any primary key.
Is a primary key necessary for replication?
I have also antoher question: We want to replicate the whole OLTP database (size 30 GB).
Is snapshot replication a suitable mechanisme for this? I thougt snapshot replication overwrites all of the data, not only changed data. Or should we use another replication method?
Thanks in advance,
Patrick de Jong
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Jul 24, 2015
I 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]....
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Jul 20, 2005
I have two tables that are related by keys. For instance,Table employee {last_name char(40) not null,first_name char(40) not null,department_name char(40) not null,age int not null,...}Employee table has a primary key (combination of last_name and first_name).Table address {last_name char(40) not null,first_name char(40) not null,street char(200) not null,city char(100) not null,...}Address table has a primary key (combination of last_name, first_name andstreet in which (last_name, first_name) reference (last_name, first_name) inemployee table.Now I want to delete some rows in Address table based on department_name inEmployee table. What is sql for this delete?I appreciate your help. Please ignore table design and I just use it for myproblem illustration.Jim
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Jun 20, 2008
Hi,
This is an easy one.
How do delete rows from a table?
I want to delete all the rows from the last month of a table so i have to be able to pass the month parameter to the delete statement.
Help.. plz.. i think this is an easy one
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May 16, 2012
In my table I have following current data. I want to delete duplicate records from table.I am trying following SQL statement, So I am getting desired output which is orange color in current data. I want to keep the desired output records and other all should be deleted. But complection is that in current data values in C5 and C6 are different.
select C1,C2,C3,C4,COUNT(*) from table_Delete
group by C1,C2,C3,C4
having COUNT(*) >= 1
ORDER BY COUNT(*) DESC
Current Data:
C1 C2 C3 C4 C5 C6
201 203224 325E 00000999
201 203224 325E 00009999
201 203224 325E 10001999
201 203224 325E 30003999
[code]....
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Jul 25, 2006
hi alli hava eetable that is ,eename sal_______ ________suresh 100000ramsesh 100000raja 100000susjssj 100000dkddkd 100000jfdjfdjfd 100000so i want to delete from second to Fourth row by using Rownumber..Rownumber is not a column of eetable give some example
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Jul 20, 2005
I need a script that will delete the first 100000 rows of a table. Is this possible?
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Sep 16, 2004
I have one table that has unique id's associated with each row of information. I want to delete rows of information in one table that have a unique ID that references information in another table.
Here is a basic breakdown of what I am trying to do:
Table1 (the table where the rows need to be deleted from)
Column_x (Holds the id that is unique to the various rows of data - User ID)
Table2 (Holds the user information & has the associated ID)
Column_z (holds the User ID)
I tried this on a test set of tables and could not get it to work. What I am trying to do is skip all rows of Table1 that have ID's present in Table2, and delete the rows of ID's that are not present in Table2.
Code:
SELECT Column_z
FROM dbo.Table2
DELETE FROM dbo.Table1
WHERE Column_z <> Column_x
This did not seem to do what I needed, it did not delete any rows at all.
I wanted it to delete all rows in Table1 that did not have a reference to a user ID that matched any ID's in Column_z of Table2
Then I tried another scenerio that I also needed to do:
Code:
SELECT Column_z, Column_a
FROM dbo.Table2
DELETE FROM dbo.Table1
WHERE Column_z = Column_x AND Column_a='0'
'0' being the user id is inactive so I wanted to delete rows in Table1 and remove all references to users that were in an inactive status in Table2.
Neither one of the Queries wanted to work for me in the Query Analyzer when I ran them. It just said (0) rows affected.
Any ideas on what I am doing wrong here?
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Aug 26, 2005
Hello,
I need to delete rows from one table that appear in another table.
For example:
newnames has fname, lname, age
oldnames has fname, lname, age
So, I want to be able to remove the rows from newname where there are rows in oldnames. This should be simple enough.
This is what I'm trying to use but it is deleting everything from oldnames.
delete from oldname
select * from newnames
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Oct 6, 2006
hi,
here i am with a table containing 5columns and 100 rows.i want to delete all rows at the same time. pls suggest me a way on this
One can never consent to creep,when one feels an impulse to soar
RAMMOHAN
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Oct 2, 2007
what is wrong with this statement?
Update services
Delete
where ticketnum = '0'
error message: incorrect syntax near keyword delete
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Feb 13, 2008
I'm a bit new to SQL, so this might be a very simple question, but I was not able to find an answer by search:
I got two tables, with a 1:n relation between them, seller and article, and I want to delete all sellers that do not offer any articles anymore.
An extract of my SQL to show the tables and the relation:
@"CREATE TABLE dbo.[Seller]
(
[ID] uniqueidentifier NOT NULL ROWGUIDCOL CONSTRAINT [PK_Seller] PRIMARY KEY,
) ON [PRIMARY]",
@"CREATE TABLE dbo.[Article]
(
[ID] uniqueidentifier NOT NULL ROWGUIDCOL CONSTRAINT [PK_Article] PRIMARY KEY,
[SellerID] uniqueidentifier NOT NULL,
) ON [PRIMARY]",
@"ALTER TABLE dbo.[Article] ADD CONSTRAINT [FK_ArticleSeller] FOREIGN KEY
(
[SellerID]
) REFERENCES dbo.[Seller]
(
[ID]
)",
Now say I got two sellers (1 & 2), and only one article (1, offered by seller 1). The delete query should delete seller 2 because he is not offering articles anymore.
This probably is dead simple in SQL, something like
DELETE FROM seller WHERE COUNT(article.SellerID=seller.ID)==0
but honestly, my SQL books leave me guessing here, and I found no online ref for cases like this.
Maybe someone can help me here?
Thanks in advance,
Sam
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Dec 5, 2006
How to I return the row count as result of deleting some rows from a table? This this script correct below?? Here's my stored procedure script..
Code:
CREATE PROCEDURE dbo.sp_CleanUp_Table_tblSoldRaw
/***************************************************************
** CREATED: 12/04/2006
****************************************************************
** DESCRIPTION: Clean the tblSoldRaw by deleting any data that
** is over 90 days old. We need keep the database
** as small as possible so the performance won't
** suffer on the server's and the client's machine.
**
****************************************************************
** NOTES: Hooked up to BookItOut Data Importer Windows Service
****************************************************************
** MODIFICATIONS:
**
** DATE WHO MODIFICATION DESCRIPTION
** -------------------------------------------------------------
**
***************************************************************/
/***************************************************************
** Uses: tblSoldRaw
***************************************************************/
AS
DELETE FROM tblSoldRaw WHERE TIMESTAMP > (GETDATE() - 90)
RETURN ROWCOUNT
ERROR_HANDLER:
RETURN -1
SET NOCOUNT OFF
Thanks...
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Apr 28, 2008
Hi there, I have a simple data flow from OLE DB to OLE DB that writes data from a view into a table. Is it possible to delete the table or the rows within the table before wirting the new data???
Thanks in advance!
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Oct 2, 2007
Hi All,
I have a program which shows some manipulate data from 2 tables on a datagrid.
I'm using another program to delete rows from both tables. (The second program activate from the PC using the RAPI dll).
I have sometimes a problem deleting records.
Actually the Datagrid is not suppose to be shown when the user use the second program, but since I'm not able to determine whether my first program is still running or not, is there an option to force the delete even if other program is using it?
If not, is there a way to stop the first program?
Thanks in advance
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Jul 21, 2015
I 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 ?
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May 26, 2000
Hi Guys!
This SQL statement, though carefully written to delete only selected rows, deletes the entire A_Shift_Times table:
DELETE FROM A_Shift_Times
WHERE EXISTS (
SELECT 1
FROM
Users
WHERE
(A_Shift_Times.time_in >= CONVERT(DATETIME, '2000-05-29 00:00:00', 102)) AND
((Users.User_Password LIKE N'mrr%') OR (Users.User_Password LIKE N'work%')))
What gives? What am I doing wrong here?
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Jul 31, 2015
Is 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.
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Apr 15, 2008
Hello I am new to SSIS and learning as I go. Any guidance to my questions would be appreciated.
I wrote a script that takes the current date and subtracts a number of days/months from this date. I then attempted to use an SQL Task as a select with a parameter using the calculated date from the script. I was not successful in doing this. While performing searches on the WEB with the hopes of finding a solution I came upon the following text in the Microsoft forum under EXECUTE SQL TASK.
When you use an OLE DB Connection Manager, you cannot use parameterized subqueries because the Execute SQL task cannot derive parameter information through the OLE DB provider. However, you can use an expression to concatenate the parameter values into the query string and to set the SqlStatementSource property of the task.
Having come upon this statement I moved on to putting together an OLE DB SOURCE with a Flat File Destination. The SQL that I wrote is:
SELECT BP_ID, INVC_NBR, INVC_DT, BUS_ADD_DT
FROM DW.CUST_SALE_ADDR
WHERE (BUS_ADD_DT = ?)
The flat file destination was mainly used to confirm the select.
Having confirmed my select, I changed the select in the OLE DB SOURCE as follows:
DELETE FROM DW.CUST_SALE_ADDR
WHERE (BUS_ADD_DT = ?)
I also removed the Flat File Destination. Needless to say when I tried to run the package I did not get very far as a package validation error was encountered since there were no output columns.
Can you share how I should go about peforming the delete as described from the table based on a calculated date? And am I not understanding the comment regarding the SQL Statement and the use of parameters?
Thank you and God Bless.
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Jul 23, 2005
Using the the NumId from TitleData, I would like to delete thecorresponding row in Bookdata using pure SQL. I want it to delete allrows in bookdata where the Titledata.NumID is a match to bookdata.idThe two tables are linked in that the NumId of table Titledata isidentical to the Id of table bookdata. I can, using ADO, loop thrudeleting one by one but I would like to do this in a pure SQLstatement. Is this possible? Any help is appreciated.I was thinking something like this way :"Delete from Bookdata where Titledata.NumID = Bookdata.id"But of course it will error.My current code is:(frmlogon.tablename is really Titledata)Dim rstry As New ADODB.RecordsetDim values As VariantSQLQuery = "Select Numid from " & frmLogon.TablenameSet rstry = frmLogon.cnConnection.Execute(SQLQuery)values = rstry.GetRowsSet rstry = Nothing'now loop thruDim xx As Integerxx = 0Do Until xx > UBound(values, 2)SQLQuery = "Delete from Bookdata where bookdata.Id = '" & values(0,xx) & "'"frmLogon.cnConnection.Execute (SQLQuery)xx = xx + 1Loop'create statements for 2 tables involved areconn.Execute "CREATE TABLE TitleData" & _"(Id INT IDENTITY (1, 1) NOT NULL PRIMARY KEY," & _"NumId INT DEFAULT 0 )"conn.Execute "CREATE TABLE BookData" & _"(Id INT IDENTITY (1, 1) NOT NULL," & _"Titles TEXT DEFAULT ''," & _"GeneralNote TEXT DEFAULT ''," & _"Author VARCHAR(100) DEFAULT ''," & _"Imprint VARCHAR(100) DEFAULT ''," & _"ISBN VARCHAR(100) DEFAULT ''," & _"Description VARCHAR(100) DEFAULT ''," & _"CallNumberPre VARCHAR(5) DEFAULT ''," & _"CallNumber VARCHAR(25) DEFAULT '',LOCNumber VARCHAR(30) DEFAULT '',"& _"Accession VARCHAR(25) DEFAULT ''," & _"Bibliography VARCHAR(100) DEFAULT ''," & _"Series VARCHAR(100) DEFAULT ''," & _"MyStatus VARCHAR(70) DEFAULT ''," & _"Barcode VARCHAR(50) DEFAULT ''," & _"LocalData VARCHAR(100) DEFAULT ''," & _"CheckoutPeriod VARCHAR(10) DEFAULT ''," & _"CatalogCard TEXT DEFAULT ''," & _"Summary TEXT DEFAULT ''," & _"MyCount VARCHAR(10) DEFAULT ''," & _"ItemDate DATETIME DEFAULT ''," & _"MyUser VARCHAR(50) DEFAULT ''," & _"MarcData TEXT DEFAULT ''," & _"SdlsRecord TEXT DEFAULT '', LOSC VARCHAR(5) DEFAULT '', LOSNDecimal(14,6) DEFAULT 0," & _"Edits Char(1) DEFAULT '', TitleDuplicate VARCHAR(50) DEFAULT '')"
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May 8, 2015
how to track how many rows updated or deleted per day in a single table and load the information in another table .
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Feb 5, 2007
Hi,
Question pls. I have an MS SQL local package where it exports data from SQL table to Excel file. My question is, how can erase all the records in my excel file before i export the new data from SQL table?
What i want is to delete the rows in the destination file before inserting new records.
Thanks a lot.
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Oct 19, 2014
I 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].....
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Apr 14, 2015
I have around 3 tables having around 20 to 30gb of data. My table A related to table B by a FK and same way table B related to table C by FK. I would like to delete all rows satisfying certain condition from table A and all corresponding related records from table B and C. I have created a query to delete the grandchild first, followed by child table and finally parent. I have used inner join in my delete query. As you all know, inner join delete operations, are going to be extremely resource Intensive especially on bigger tables.
What is the best approach to delete all these rows? There are many constraints, triggers on these tables. Also, there might be some FK relations to other tables as well.
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Sep 29, 2015
I would like to perform autodeletion operation from my table using stored procedure....
Here is my table structure:
Emp.id | emp_name | dept | desig | time_out | date | emp_sign |
if the user inserts new employee record that record should delete automatically from original after
30 minutes..I don't want to keep that newly inserted record after
30 minutes...I don't know how to achieve this...
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May 28, 2004
Hello:
I have a database table where a primary key is defined. When I enter data that is the same as another table, it does not allow and throws an error which I do want. What happens is that a Server Error in Application error type is thrown with the following message:
Violation of PRIMARY KEY constraint 'PK_cs_sc'. Cannot insert duplicate key in object 'cs_sc'. The statement has been terminated.
How can I detect the error in my own asp.net page code so that it does not forward my users to the asp.net server error page? Heres my code below... how can I check for success or failure within this code?
Dim conSqlConnect As SqlConnection
Dim strInsert As String
Dim cmdInsert As Sqlcommand
conSqlConnect = New SqlConnection( "Server=localhost;uid=var;pwd=var;database=var" )
strInsert = "Insert cs_sc ( [name] ) Values ( @name )"
cmdInsert = New SqlCommand ( strInsert, conSqlConnect )
conSqlConnect.Open()
cmdInsert.ExecuteNonQuery()
conSqlConnect.Close()
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Feb 16, 2008
Hi,
i defined a sqldatasource in VWD manually (option specify sql statement) because several tables are involved. I also need a Delete statement, so i defined it also manually.
The select and delete statement are :
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:test %>" SelectCommand="SELECT aspnet_Users.UserName as lid, aspnet_Roles.RoleName as categorie, aspnet_Users.beheerder as beheerder, aspnet_Membership.Email as emailadres FROM aspnet_Users INNER JOIN aspnet_Membership ON aspnet_Users.UserId = aspnet_Membership.UserId INNER JOIN aspnet_UsersInRoles ON aspnet_Users.UserId = aspnet_UsersInRoles.UserId inner JOIN aspnet_Roles ON aspnet_UsersInRoles.RoleId = aspnet_Roles.RoleId order by username"
DeleteCommand="delete from aspnet_users where userid=@userid"> <DeleteParameters> <asp:Parameter Name="userid" /> </DeleteParameters> </asp:SqlDataSource>
My problem is that the Select works, but not the Delete.
Any idea why?
Thanks
tartuffe
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Feb 16, 2008
I'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)
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Aug 20, 2007
I 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?
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Mar 12, 2007
I 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?
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Feb 1, 2007
Hi seniors
there are two tables involve in replication let say table1 and replicated table is also rep.table1.
we are not deleting records physically in table1 so only a bit in table1 has true when u want to delete a record but the strange thing is that replication agaent report that this is hard delete operation on table1 so download and report hard delete operation and delete the record in replicated table which is very crucial.
plz let me know where am i wrong and how i put it into right way.
there is no triggers on published tables and noother trigger is created on published table.
regards
Ahmad Drshen
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Sep 24, 2015
I have a table where I need to delete rows if the member does not exists in the member table. Will the following syntax work ?
Delete T
FROM Event_Temp_Lead_Screen T
left join member M on ( M.MemberID = T.MemberID )
where
T.Gender is NULL
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