Why Can't I Delete A Record With A Variable In The Querystring?
Dec 17, 2004
If I script the SQL statement with a constant, deleting the record from the database works.
If I script the SQL statement to delete based on the WHERE clause being a variable name, it will not delete the record.
The value being compared in the WHERE clause comes directly from the Sequel database.
I have a dropdown box that is filled from the database. The dropdown1.selecteditem.text is placed in a variable. The script is to delete a record from the database where the table.name in the database equals the item name selected from the dropdown box.
This querystring does not delete the record from the database:
dim queryString As String = "DELETE FROM [Table1] WHERE ([Table1].[name] = 'variableCompareText')"
This querystring does delete the recrod from the database:
dim queryString As String = "DELETE FROM [Table1] WHERE ([Table1].[name] = 'John')"
Why can't I delete a record with a variable in the querystring? Otherwise, you would have to always know in advance which record to specify rather than being deleted dynamically.
Hi,I wrote two queries to search in three tables mp_parent, mp_page and mp_parentThe first one is: SELECT mp_page.PID, mp_page.PageID, mp_page.PageContent, mp_page.ParID, mp_page.ChiID, mp_parent.ParentName FROM mp_page INNER JOIN mp_parent ON mp_page.ParID = mp_parent.ParentID The second one is:SELECT mp_page.PID, mp_page.PageID, mp_page.PageContent, mp_page.ParID, mp_page.ChiID, mp_child.ChildName FROM mp_page INNER JOIN mp_child ON mp_page.ChiID = mp_child.ChildID I used this way to display the records in a FormView public HttpContext context = HttpContext.Current; public void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { ViewState["srch"] = context.Items["srch"]; } FormView1.DataSource = GetTable(); FormView1.DataBind(); } private DataTable GetTable() { SqlConnection SqlCon = new SqlConnection("Data Source=AJ-166DCCD87;Initial Catalog=mp;Integrated Security=True;Pooling=False"); String SQL1 = "select mp_page.PID, mp_page.PageID, mp_page.PageContent, mp_page.ParID, mp_page.ChiID, mp_parent.ParentID, mp_parent.ParentName from mp_page INNER JOIN mp_parent ON mp_page.ParID = mp_parent.ParentID where PageContent like '%" + Convert.ToString(ViewState["srch"]) + "%'"; SqlDataAdapter Adptr = new SqlDataAdapter(SQL1, SqlCon); SqlCommandBuilder CB = new SqlCommandBuilder(Adptr); DataTable Dt = new DataTable(); Adptr.Fill(Dt); return Dt; SqlCon.Close(); } the question is how can I check if one record is empty to witch to another query ??Is it possible to know without using QueryString?Thank you
hi. i'm building a news section for some friends of mine. i list all the news items on the main page in a gridview. i've made a custom edit linkbutton that sends the user to an edit page, passing the news id as a quarystring variable. on the edit page i first check if the querystring variable contains an id at all. if not, i redirect the user to the main page. if an id is passed with the querystring, i fetch the matching news item from the database and place it in a formview control for editing.so far, so good. but what if someone types a random id in the querystring? then the formview won't show up and i'd look like a fool. :) therefore, i need some kind of check to see if the id exists in the database. if not redirect the user back to the main page... so i started thinking: i could check the databsae in a page_load procedure. if all is well, then display the news item. since the formview is automatically filled with the correct data, does that mean that i call the database two times? i mean, one for checking if the news item exists, and one for filling the formview. logically, this would be a waste of resources.help is appreciated.
I'm trying to clean up a database design and I'm in a situation to where two tables need a FK but since it didn't exist before there are orphaned records.
Tables are:
Brokers and it's PK is BID
The 2nd table is Broker_Rates which also has a BID table.
I'm trying to figure out a t-sql statement that will parse through all the recrods in the Broker_Rates table and delete the record if there isn't a match for the BID record in the brokers table.
I know this isn't correct syntax but should hopefully clear up what I'm asking
Hi All,I have a table in SQL Server 2000 that contains several million memberids. Some of these member ids are duplicated in the table, and eachrecord is tagged with a 1 or a 2 in [recsrc] to indicate where theycame from.I want to remove all member ids records from the table that have arecsrc of 1 where the same member id also exists in the table with arecsrc of 2.So, if the member id has a recsrc of 1, and no other record exists inthe table with the same member id and a recsrc of 2, I want it leftuntouched.So, in a theortetical dataset of member id and recsrc:0001, 10002, 20001, 20003, 10004, 2I am looking to only delete the first record, because it has a recsrcof 1 and there is another record in the table with the same member idand a recsrc of 2.I'd very much appreciate it if someone could help me achieve this!Much warmth,Murray
How can i delete a record from a table . table contains approx 3 million data and when i execute a query for delete it give error message from transaction log space problem. Is there any way to stop the log in transaction log and delete the record.
whats the best way to delete a parent record? for now what i am doing is to have a special delete page (means not DetailsView/GridView) just to delete parent records so user can see what child records will be deleted too. is the a better way?my code below: The T-SQL Stored ProcedureALTER PROCEDURE dbo.DeleteInventory ( @InventoryID int ) AS DELETE FROM Booking WHERE InventoryID = @InventoryID
DELETE FROM Inventory WHERE InventoryID = @InventoryID The code in the Code Behind to execute when a button(delete) click Try Dim temp As Integer = SqlDataSource4.Delete If temp > 0 Then lblDeleteDtatus.ForeColor = Drawing.Color.Blue lblDeleteDtatus.Text = temp & " Records/Rows Deleted." Else lblDeleteDtatus.ForeColor = Drawing.Color.Orange lblDeleteDtatus.Text = "No records Deleted!" End If Catch ex As Exception lblDeleteDtatus.ForeColor = Drawing.Color.Red lblDeleteDtatus.Text = "An Error Occured.<br />" & ex.Message.ToString End Try any better methods anyone wants to share?
This one is driving me nuts. I've issued a very simple statement to delete a single row from a table. It appears that when I execute it in SQL Query Analyzer the CPUTime spikes and holds one of the CPUs on the box pegged at 100%. I've let this thing run for over a day, and it's not deleting the one damn record. Any thoughts? :confused: :confused: Here's the command I'm executing:
DELETE FROM Invoices WHERE InvoiceID = 153345
Running SELECT * FROM Invoices WHERE InvoiceID = 153345 returns only a single record as it should. InvoiceID is the PK in this table. Any and all help is greatly appreciated. I've rebooted the server, but to no avail. Same thing happens after a reboot.
Hi everyone... I have a problem on deleting a record. I accidentally duplicate the record. I need to delete other records and left only 1 record based on each date and employeenumber.
supposing i have a table hrempshiftschedule i have 3 fields... empno, shiftdate, and shifttype
Hi i have a very annying problem that i cant seem to solve by myself. I have developed a content managment system for a webpage where people can manage the page. It's almost done except for the fact that i cant seem to delete records from my sql express database. To access the database i use an sql login in my code to delete witchever record is retrived from a querystring in the URL field. Below is a sample of my delete code when a button is pressed. protected void ButtonDelete_Click(object sender, EventArgs e) { string dID = Request.QueryString["dID"];
string myConnectionString = @"Data Source=SRVWEBSQLEXPRESS;Initial Catalog=se;User ID=xx;Password=xx"; SqlConnection myConnection = new SqlConnection(myConnectionString); string myDeleteQuery = "DELETE FROM drift WHERE dID = @dID"; SqlCommand myCommand = new SqlCommand(myDeleteQuery); myCommand.Parameters.AddWithValue("dID", dID);
Response.Redirect("list.aspx"); } When the i run the code on my development machine located at 10.12.0.80 and the server is located at 10.12.1.65 and this is where the databse is located. The strangest thing is that when i press my deletebutton while debugging in VS2008 on my devmachine the record is deleted! BUT when i run the code live on the server i get an error. See the below log file taken from the windows 2003 server application log. Event Type: InformationEvent Source: ASP.NET 2.0.50727.0Event Category: Web Event Event ID: 1314Date: 2008-04-07Time: 10:26:45User: N/AComputer: SRVWEBDescription:Event code: 4011 Event message: An unhandled access exception has occurred. Event time: 2008-04-07 10:26:45 Event time (UTC): 2008-04-07 08:26:45 Event ID: 8bdda96aeee44448b570891c593bdb3e Event sequence: 242 Event occurrence: 1 Event detail code: 0 Application information: Application domain: /LM/W3SVC/1015505475/Root-1-128520196339603398 Trust level: Full Application Virtual Path: / Application Path: C:wwwwebsite Machine name: SRVWEB Process information: Process ID: 5156 Process name: w3wp.exe Account name: NT AUTHORITYNETWORK SERVICE Request information: Request URL: http://website/cms/drift/editdrift.aspx?dID=19 Request path: /cms/drift/editdrift.aspx User host address: 10.12.1.1 User: webmaster Is authenticated: True Authentication Type: Forms Thread account name: NT AUTHORITYNETWORK SERVICE Could anyone help me solve this problem. Thanks.
I'm having trouble with the below sql command. What I'm trying to do is to delete records from tblPhotoHeader table where there are no corresponding child records in tblPhoto.
The select statement works correctly, I'm just not sure about how to apply the syntax to correctly select the records in the delete statement.
Any help from the experts here would be helpful.
Thanks
Tom
--------------------------------------------------------------------- DELETE FROM tblPhotoHeader WHERE Exists
Well, I really messed up. Instead of changing the name of a current company record in a table I changed ALL the company names in the table. Me.CustomerDataSource.SelectCommand = "UPDATE tbl_customers SET company = '" & companyTextBox.Text & "'" So, I need to insert a WHERE clause to fix this. My problem is that I've been searching everywhere for this simple command structure and cannot find anything that specifically addresses a simple way to reference the current record. I tried...Me.CustomerDataSource.SelectCommand = "UPDATE tbl_customers SET company = '" & companyTextBox.Text & "' WHERE recno = @recno" But I get the error: Exception Details: System.Data.SqlClient.SqlException: Must declare the scalar variable "@recno". Can anyone provide this simple query clause?
I have a table with a large number of records that I need to delete, before attempt to perform the delete I also archived the records to another table.
So I need to delete all of these selected records stored in the archive table from the main table. I can now reference all the records that qualify for the delete in the main table by performing a join on the archive table like so:
select * from my_main_table a join my_archive_table b on a.distinct_id=b.distinct_id and a.surrogate_key=b.surrogate_key and a.identifier=b.indentifier
So all the records check out to be the ones I'd like to perform a delete on but I just can't figure out how to perform a delete of the records with little or no change to the existing query.
Obviously something like this won't work:
delete from my_main_table a join my_archive_table b on a.distinct_id=b.distinct_id and a.surrogate_key=b.surrogate_key and a.identifier=b.indentifier
Though it would be nice if it did.:D
So my question is how would I use the existing query with some modification to delete only the records that this query returns. I've tried selection of records in the main table based on the existing records in the archive table but it can return a higher number of records than what I know is expected. I actually need the join specified to be in place to do it.
Hi.I have a "union" table which results of a union of two tables.Occasionally I could have duplicates, when the same PIN has been addedto both tables, albeit at different Datees/Times, such as:PINNameAdded Date100411A7/11/2007 10:12:58 AM100411A7/17/2007 10:54:23 AM100413B7/11/2007 10:13:28 AM100413B7/17/2007 10:54:39 AM104229C7/6/2007 2:34:13 PM104231D7/6/2007 2:34:25 PM104869E6/10/2007 11:59:12 AM104869E6/22/2007 2:40:18 PMThe question is - how can I delete by queries the first occurence(time-wise) of these duplicates - i.e. I would want to delete thefirst occurence of 100411 (A), the first occurence of 100413 (B), andthe first occurence of 104869 (E) in the example above - records C andD show only once, so they are fine.Is there a MsAccess solution ? Is there a SQL-server solution ?Thank you very much !Alex
Hi There, I have created a trigger which supposingly will do event before delete the record from its own table.unfortunately when i try delete the record to test it whether it will do the event (inserting some records to another table), i found that it was not doing the event like i wanted to be. :(the trigger is as below :=======================CREATE TRIGGER TG_D_AGENT ON dbo.AgentFOR DELETEASbegindeclare @vAgentID as numeric,@vAgency as varchar(50),@vUnit as varchar(50),@vAgentCode as varchar(50),@vName as varchar(50),@vIC as varchar(14),@vAddress as varchar(100),@vContactNumber as varchar(50),@vDownlink as varchar(50),@vGSM as varchar(10),@vAM as varchar(10),@vDeleted_date as datetime set @vDeleted_date = convert(datetime, convert(varchar(10) , getdate(),103),103)declare cur_policy_rec CURSOR forselect AgentID,Agency,Unit,AgentCode,[Name],IC,Address,ContactNumber,Downlink,GSM,AM from insertedopen cur_policy_recfetch from cur_policy_rec into @vAgentID,@vAgency,@vUnit,@vAgentCode,@vName,@vIC, @vAddress,@vContactNumber,@vDownlink,@vGSM,@vAM WHILE @@FETCH_STATUS=0BEGIN INSERT INTO [Agent_history] (AgentID,Agency,Unit,AgentCode,Name,IC,Address,Con tactNumber,Downlink,GSM,AM,Deleted_date) VALUES(@vAgentID,@vAgency,@vUnit,@vAgentCode,@vNam e,@vIC,@vAddress,@vContactNumber,@vDownlink,@vGSM, @vAM,@vDeleted_date)fetch from cur_policy_rec into @vAgentID,@vAgency,@vUnit,@vAgentCode,@vName,@vIC, @vAddress,@vContactNumber,@vDownlink,@vGSM,@vAM enddeallocate cur_policy_recend===============================in oracle , i normallly can do something like this...====================================CREATE TRIGGER TG_D_AGENT ON dbo.AgentBEFORE DELETE ON dbo.Agent FOR EACH ROWbeginIs that such thing function like 'BEFORE' in MS SQL SERVER 2000, coz in sql server im not sure they do have or not. Plz someone help me on this...realy appreciated if can!
I will try my best to explain this, We have a shopping cart on our website, the person that was developing this has now left the company and I've been given the job to finish it off.
When I load all the items that the user has entered in to his/her cart I return the Item ID and the RowNumber (ROW_NUMBER() OVER (Order by Id) AS RowNumber)
I'm trying to delete the item from the table using the following query
DELETE FROM [dbo].[Cart.Items] WHERE UniqueID = UniqueID and ItemID = @ItemID and @RowNumber IN ( SELECT ROW_NUMBER() OVER (Order by Id) AS RowNumber)
Now the reason we are using the RowNumber is because the user can add the same Item as many times as they like so for example you buy 3 different mobile phones, and you want three screen protectors, they will click screen protector 3 times which will add 3 records in to the db with the same id. so the row number is used to find the correct one.
Somehow I got the value -1.#IND into several records in a table in SQL 2000 DB.
I assume that it is a kind of €œNot A Number€??
The problem I am facing now, is that I can not modify the value to a legal value. Nor can I delete the record that holds the number. I get the error message:
€œAnother user has modified the contents of this table or view, the database row you are modifying no longer exists in the database. Database error: €˜[Microsoft][ODBS SQL Server Driver][SQL Server] A floating point exception occurred in the user process. Current transaction is cancelled.€?
Hi, I want to delete from table when the record count is over 5000. That is, the table's record cannot over 5000 count. How? row_number() seem to be used...
Can someone say how to declare a record like variable in MSSQL-2000 Like: mr_rec record of variables a int, b char(20), c datetime? I could not find any examples on BOL. I want to use this in a stored procedure create script.
I am running a query in with my daily import job that lets me know if a duplicate record was imported into the system. If so I want to setup my email table to mail me the following information. My code works fine except the value of the variable @ID is only giving me the first record in the set. How do I pass it on to the next record? I get the right number of rows inserted into the email table but the @ID variable is the same for all 3.
Drop Table #SER1
Select id#,
Colx=Count(*)
Into #SER1
From Business
Group By id#
Having Count(id#) > 1
Declare @ID Varchar (4)
Select @ID = ID# from #SER1
INSERT INTO Email
( [To],
[Subject],
[message],
[Table],
TableUKey,
TableSource
)
SELECT
'Firstname.Lastname@Company.com',
'Duplicate ID# Imported',
'ID# ' + @ID + ' has been imported multiple times ' + ' on ' + cast( getdate() AS varchar(30)) + '. You need to remove the record and rerun the import.',
