Deleting Data From Database
Nov 23, 2004
Edited by SomeNewKid. Please post code between <code> and </code> tags.
I have added a delete button to my datagrid, and put in what I think is the code to delete a member from the database at their Member ID, however when I have called a members details and the delete button is pressed, nothing happens!!??
Any ideas?
Here is the code:
<%@ Page Language="VB" %>
<script runat="server">
' Insert page code here
'
Function GetMember(ByVal iD As Integer) As System.Data.SqlClient.SqlDataReader
Dim connectionString As String = "server='localhost'; trusted_connection=true; Database='adp1SQL'"
Dim sqlConnection As System.Data.SqlClient.SqlConnection = New System.Data.SqlClient.SqlConnection(connectionString)
Dim queryString As String = "SELECT [oga].* FROM [oga] WHERE ([oga].[ID] = @ID)"
Dim sqlCommand As System.Data.SqlClient.SqlCommand = New System.Data.SqlClient.SqlCommand(queryString, sqlConnection)
sqlCommand.Parameters.Add("@ID", System.Data.SqlDbType.Int).Value = iD
sqlConnection.Open
Dim dataReader As System.Data.SqlClient.SqlDataReader = sqlCommand.ExecuteReader(System.Data.CommandBehavior.CloseConnection)
Return dataReader
End Function
Sub dgMember_Delete(sender as Object, e as DataGridCommandEventArgs)
dgMember.EditItemIndex = -1
dgMember.DataSource = GetMember(memberID.Text)
dgMember.DataBind()
End Sub
Sub btnView_Click(sender As Object, e As EventArgs)
dgMember.DataSource = GetMember(memberID.Text)
dgMember.DataBind()
End Sub
Sub dgMember_SelectedIndexChanged(sender As Object, e As EventArgs)
End Sub
Function DeleteMember(ByVal iD As Integer) As Integer
Dim connectionString As String = "server='localhost'; trusted_connection=true; Database='adp1SQL'"
Dim sqlConnection As System.Data.SqlClient.SqlConnection = New System.Data.SqlClient.SqlConnection(connectionString)
Dim queryString As String = "DELETE FROM [oga] WHERE ([oga].[ID] = @ID)"
Dim sqlCommand As System.Data.SqlClient.SqlCommand = New System.Data.SqlClient.SqlCommand(queryString, sqlConnection)
sqlCommand.Parameters.Add("@ID", System.Data.SqlDbType.Int).Value = iD
Dim rowsAffected As Integer = 0
sqlConnection.Open
Try
rowsAffected = sqlCommand.ExecuteNonQuery
Finally
sqlConnection.Close
End Try
Return rowsAffected
End Function
</script>
<html>
<head>
</head>
<body id="dgMemberInfo">
<font face="arial">
<h1><img src="thlogotop.gif" align="left" /> <img src="thlogotop.gif" align="right" />
<br />
<center><font color="red">T</font>albot <font color="red">H</font>eath <font color="red">O</font>ld <font color="red">G</font>irls <font color="red">A</font>ssociation
</center>
</h1>
<h2 align="center">Delete a Member
</h2>
<asp:HyperLink id="HyperLink1" runat="server" Width="94px" NavigateUrl="Default.aspx">Main Menu</asp:HyperLink>
<hr />
<br />
<br />
<br />
<p align="center">
</p>
<form runat="server">
<br />
<div align="center">Please Enter Member ID :
<asp:TextBox id="memberID" runat="server"></asp:TextBox>
</div>
<br />
<br />
<br />
<br />
<div align="center">
<asp:Button id="btnView" onclick="btnView_Click" runat="server" Width="204px" Text="View Member Details"></asp:Button>
</div>
<br />
<br />
<p align="center">
<asp:DataGrid id="dgMember" runat="server" BorderColor="Black" OnSelectedIndexChanged="dgMember_SelectedIndexChanged" AutoGenerateColumns="False" OnDeleteCommand="dgMember_Delete">
<Columns>
<asp:ButtonColumn Text="Delete" ButtonType="PushButton" CommandName="Delete"></asp:ButtonColumn>
<asp:BoundColumn DataField="ID" HeaderText="ID">
<HeaderStyle font-bold="True" horizontalalign="Center" verticalalign="Middle"></HeaderStyle>
</asp:BoundColumn>
<asp:BoundColumn DataField="Member No" HeaderText="Member No">
<HeaderStyle font-bold="True" horizontalalign="Center"></HeaderStyle>
</asp:BoundColumn>
<asp:BoundColumn DataField="Surname" HeaderText="Surname">
<HeaderStyle font-bold="True" horizontalalign="Center"></HeaderStyle>
</asp:BoundColumn>
<asp:BoundColumn DataField="Forenames" HeaderText="Forenames">
<HeaderStyle font-bold="True" horizontalalign="Center"></HeaderStyle>
</asp:BoundColumn>
<asp:BoundColumn DataField="Known as" HeaderText="Known As">
<HeaderStyle font-bold="True" horizontalalign="Center"></HeaderStyle>
</asp:BoundColumn>
<asp:BoundColumn DataField="Title" HeaderText="Title">
<HeaderStyle font-bold="True" horizontalalign="Center"></HeaderStyle>
</asp:BoundColumn>
<asp:BoundColumn DataField="Address" HeaderText="Address">
<HeaderStyle font-bold="True" horizontalalign="Center"></HeaderStyle>
</asp:BoundColumn>
<asp:BoundColumn DataField="Home Tel" HeaderText="Home Tel">
<HeaderStyle font-bold="True" horizontalalign="Center"></HeaderStyle>
</asp:BoundColumn>
<asp:BoundColumn DataField="Email" HeaderText="Email">
<HeaderStyle font-bold="True" horizontalalign="Center"></HeaderStyle>
</asp:BoundColumn>
<asp:BoundColumn DataField="DOB" HeaderText="DOB">
<HeaderStyle font-bold="True" horizontalalign="Center"></HeaderStyle>
</asp:BoundColumn>
<asp:BoundColumn DataField="StartDate" HeaderText="StartDate">
<HeaderStyle font-bold="True" horizontalalign="Center"></HeaderStyle>
</asp:BoundColumn>
<asp:BoundColumn DataField="LeaveDate" HeaderText="LeaveDate">
<HeaderStyle font-bold="True" horizontalalign="Center"></HeaderStyle>
</asp:BoundColumn>
<asp:BoundColumn DataField="clubsoc" HeaderText="Club/Society">
<HeaderStyle font-bold="True" horizontalalign="Center"></HeaderStyle>
</asp:BoundColumn>
</Columns>
</asp:DataGrid>
</p>
<p align="center">
</p>
<p align="left">
<br />
<br />
</p>
<!-- Insert content here -->
</form>
</font>
</body>
</html>
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I am trying to delete tables from data where the ModifiedDates older than 9 years in AdventureWorks2012 database . I get console notified that foreign keys are dropped but the delete statement is throwing errors. I am sure that somewhere the key constraints are not getting altered, but i'm not able to figure it out as i'm a relative beginner to T-SQL. The error and code:
The DELETE statement conflicted with the REFERENCE constraint "FK_SalesOrderHeaderSalesReason_SalesReason_SalesReasonID". The conflict
occurred in database "AdventureWorks2012", table "Sales.SalesOrderHeader
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I don't know if the question has been nailed down. Aside from deleting tables, can we delete the *content* of data within the tables. It doesn't seem crazy that, if you can pull in data from a feed then you should be able to remove the content out again (without also destroying the user's meta-data work ). Reasons for this include:
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Obviously Excel internally knows how to clear out PowerPivot data, given the prompt shown here: [URL] ....
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Previous time this question was asked, without a real resolution: [URL] ....
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I have edited the aspnet_Users_CreateUser stored procedure so that the UserId that is created when a new user is created is copied to a UserId field in another table. However, when I use the website administration tool to delete users that have been created, it gives me an error saying the delete statement conflicted with the reference constraint. I then added the following code in the aspnet_Users_DeleteUser procedure....
IF ((@TablesToDeleteFrom & 16) <> 0 AND
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BEGIN
DELETE FROM dbo.userclassset WHERE @UserId = UserId
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/****** Object: StoredProcedure [dbo].[dbo.ServiceLog] Script Date: 07/18/2014 14:30:59 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER proc [dbo].[ServiceLogPurge]
-- Purge records dbo.ServiceLog older than 3 months:
-- Purge records in small portions to avoid locking production tables
-- for a long time. The process takes longer, but can co-exist with
-- normal usage of the tables.
[Code] ...
*** Getting this error below when executing the code ***
Msg 102, Level 15, State 1, Procedure ServiceLogPurge, Line 45
Incorrect syntax near 'Failed:'.
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Mar 24, 2008
hi I Cant delete items in my grid view.. here is my code
"
DeleteCommand="DELETE FROM [aspnet_Membership] WHERE [UserId = @UserId]" SelectCommand="SELECT First, Last, Email, CreateDate, IsApproved, IsLockedOut FROM aspnet_Membership">
when i run it.. and clicked the delete button.. this appears:
Server Error in '/mapuaResearch' Application.
--------------------------------------------------------------------------------
An expression of non-boolean type specified in a context where a condition is expected, near 'UserId = @UserId'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.SqlClient.SqlException: An expression of non-boolean type specified in a context where a condition is expected, near 'UserId = @UserId'.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[SqlException (0x80131904): An expression of non-boolean type specified in a context where a condition is expected, near 'UserId = @UserId'.]
System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) +95
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +82
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +346
System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +3430
System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) +186
System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) +1139
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) +334
System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe) +407
System.Data.SqlClient.SqlCommand.ExecuteNonQuery() +149
System.Web.UI.WebControls.SqlDataSourceView.ExecuteDbCommand(DbCommand command, DataSourceOperation operation) +493
System.Web.UI.WebControls.SqlDataSourceView.ExecuteDelete(IDictionary keys, IDictionary oldValues) +922
System.Web.UI.DataSourceView.Delete(IDictionary keys, IDictionary oldValues, DataSourceViewOperationCallback callback) +176
System.Web.UI.WebControls.GridView.HandleDelete(GridViewRow row, Int32 rowIndex) +914
System.Web.UI.WebControls.GridView.HandleEvent(EventArgs e, Boolean causesValidation, String validationGroup) +1067
System.Web.UI.WebControls.GridView.RaisePostBackEvent(String eventArgument) +215
System.Web.UI.WebControls.GridView.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +31
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +32
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +244
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3839
--------------------------------------------------------------------------------
Version Information: Microsoft .NET Framework Version:2.0.50727.832; ASP.NET Version:2.0.50727.832
PLEASE HELP ME!!!!! TNX
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Mar 6, 2008
I have been trying to develop a simple delete operation in VB using a local SQL Express database located inside the project. My selects, inserts, and updates are working ok, but for some reason my delete doesn't want to work.
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Code Snippet
DELETE FROM Providers
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Code Snippet
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Thanks in advanced for the help.
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Is this close to the correct syntax for a stored procedure for deleting all the data from a particular table... or is there a better way?
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SET QUOTED_IDENTIFIER ON
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CREATE PROCEDURE TruncateTmpBank
[Code] ....
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Aug 10, 2015
I wrote a script to archive and delete records rom a table back in 2005 and 2009.
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This is what I have so far.
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FROM tblCall
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--SELECT @ArchiveDate AS ArchiveDate
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[code]....
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Hi,
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I have an entry form allowing customers to enter up to 15 skus (productid) at a time, so they can make a multiple order, instead of enteringone sku, then submitting it, then returing to the form to submit thesecond one, and so forth.From time to time, the sku they enter will be wrong, or discontiued, soit will not submit an order.Therefore, when they are done submitting their 15 skus through the orderform, I want a list showing them all of those skus that came back blank,or were not found in the database.I'm doing this by creating two tables. A shopping cart, which holds allthe skus that were returned, and a holding table, that holds all theskus that were submitted. I want to then delete all the skus in theholding page that match the skus in teh cart (because they are goodskus) which will then leave the unmatched skus in the holding table.I'll then scroll out the contents of the holding table, to show them theskus that were not found in the database.(confused yet?)So what I want to do is have some sql that will delete from the holdingtable where the sku = the sku in the cart. I've tried writing this, butit dosn't work.I tiried this delete from holding_table where sku = cart.skuI was hoping this would work, but it dosn't. Is there a way for me to dothis?Thanks!Bill*** Sent via Developersdex http://www.developersdex.com ***Don't just participate in USENET...get rewarded for it!
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Mar 20, 2008
Hi Everybody,
Kindly let me know if there is a way of deleting data from primary table without deleting data from its corresponding foreign key table.
Thanks & Regards
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Sep 27, 2006
I have a table that contains more than 10,000 rows of
duplicate data. The script below copies the data to a temp table then
deletes from the original table. My problem is that after it runs, I now
have 122 rows of triplicate data (but dups are gone). If I rerun the script, it doesn't see the
triplicate data and returns 0 rows. I've use three different versions of
delete dup row scripts with the same result. There are no triggers or
constraints on the table, not even a primary key. What am I missing?-------------------------------------------------------------------
/**********************************************
Delete Duplicate Data
**********************************************/
--Create temp table to hold duplicate data
CREATE TABLE #tempduplicatedata
(
[student_test_uniq] [bigint] NULL,
[test_uniq] [int] NULL,
[concept_id] [smallint] NULL,
[test_id] [varchar](12) NULL,
[questions_correct] [smallint] NULL,
[questions_count] [smallint] NULL,
[percentage_correct] [decimal](6, 3) NULL,
[concept_response_count] [smallint] NULL
)
--Identify and save dup data into temp table
INSERT INTO #tempduplicatedata
SELECT * FROM crt_concept_score
GROUP BY student_test_uniq,
test_uniq,
concept_id,
test_id,
questions_correct,
questions_count,
percentage_correct,
concept_response_count
HAVING COUNT(*) > 1
--Confirm number of dup rows
SELECT @@ROWCOUNT AS 'Number of Duplicate Rows'
--Delete dup from original table
DELETE FROM crt_concept_score
FROM crt_concept_score
INNER JOIN #tempduplicatedata
ON crt_concept_score.student_test_uniq = #tempduplicatedata.student_test_uniq
AND crt_concept_score.test_uniq = #tempduplicatedata.test_uniq
AND crt_concept_score.concept_id = #tempduplicatedata.concept_id
AND crt_concept_score.test_id = #tempduplicatedata.test_id
AND crt_concept_score.questions_correct = #tempduplicatedata.questions_correct
AND crt_concept_score.questions_count = #tempduplicatedata.questions_count
AND crt_concept_score.percentage_correct = #tempduplicatedata.percentage_correct
AND crt_concept_score.concept_response_count = #tempduplicatedata.concept_response_count
--Insert the delete data back
INSERT INTO crt_concept_score
SELECT * FROM #tempduplicatedata
--Check for dup data.
SELECT * FROM crt_concept_score
GROUP BY student_test_uniq,
test_uniq,
concept_id,
test_id,
questions_correct,
questions_count,
percentage_correct,
concept_response_count
HAVING COUNT(*) > 1
--Check table
-- SELECT * FROM crt_concept_score
--Drop temp table
DROP TABLE #tempduplicatedata
GO
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May 30, 2006
I can run a select to retrieve data using a prefix 'a' for the specific table involved. However when I try to run a delete using the same criteria it fails telling me
Msg 102, Level 15, State 1,.......Line 1
Incorrect syntax near 'a'
The Select statement looks like:
select count(*) from schema.table a where a.customer_id=1234
The Delete looks like:
delete from schema.table a where a.customer_id=1234
What am I doing wrong here? and how can I prefix the table, because the command I want to run is much more complicated than the example above and it needs the prefix
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Aug 22, 2007
When I delete substantial amounts of data using the SQL DELETE command, the database size apparently remains the same (702 mb) and the log file goes from about 17 mb to over 1 gig. I was expecting for the overall size to decrease drastically, but got just the opposite.
Is this typical? Can I do something to slim it down? As I am just trying to decrease the overall size to make it easier to work with when creating my application in VB, I am not worried about restoring the db (I have secure copies).
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Jan 9, 2008
Hi All,
I have to delete 135 Million records from our production server, keeping only last three months data & the table doesnot have any index.
Can you please suggest the best possible approach to perform this activity.
Approach i am thinking :-
1)I will rename the existing table & create a new table with the same name (By this my application wont be interrupted)
2)then i am planning to create a nonclustered index on the date column sort order desc so that i can get the last three months data.
3)Once the index is created i can transfer the required records to the new table created in step 1.
Please sugeest your valuable feedback or suggestions to perform the task ASAP.
Thanks
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Aug 24, 2015
I'm trying to delete some records from some tables in a SQL Server 2008 R2 database. There's a foreign key relationship between the two tables. To make things easier here's the definition of both tables:
-- Parent table
CREATE TABLE [dbo].[PharmInvInItemPackages](
[InventoryInDetailID] [int] IDENTITY(1,1) NOT NULL,
[InventoryInID] [int] NOT NULL,
[ItemPackageID] [int] NOT NULL,
[code]....
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May 2, 2007
Hi, am new to sql server. Please some one send me some introduction abt stored procedures and some coding exammples to update and fetch the data from datasourece.
thanks.
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