What Is Faster... INSERT Or UPDATE?

Jan 21, 2005

I have a situation where currently, I check to see if a record exists and I do an update if it does, I do an INSERT if it does not. This happens about 200k times each night.





I'm trying to speed the application up that is doing this and I was wondering if it would be a better idea to just delete the records I'm about to recreate, before I start, then do an unconditional insert.





It would eliminate my IF EXISTS check but if an update is faster than an insert, it might even out.





Also, will SQL deal with the big delete and the data being recreated each night without too much bloating or fragmentation?

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What Is Faster?! Update Or Delete And Insert

Dec 6, 2007

Hello,

What is faster / better for performance?

Check if something already excist and update the changed values? or delete the whole table and then insert everything?

Thanks!

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Jan 26, 2001

Hi.We have stored procedure update specific table
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1.Can force Sql server do not make entry for each insert and if yes would it increase speed of procedure ?
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EXAMPLE:

CREATE TABLE dbo.MYTABLE(
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[Code] ....

If an INSERT looks like any of the following what can I do to change the NULL being assigned to DateAdded to a real date, preferable the value of GetDate() at the time of the insert? I've heard of INSTEAD of Triggers but I'm not trying tto over rise the entire INSERT or update just the on (maybe 2) fields that are being left as null or explicitly set to null. The same would apply for any UPDATE where DateModified is not specified or explicitly set to NULL. I would want to change it so that DateModified is not null on any UPDATE.

INSERT INTO dbo.MYTABLE( FirstName, LastName, DateAdded)
VALUES('John','Smith',NULL)

INSERT INTO dbo.MYTABLE( FirstName, LastName)
VALUES('John','Smith')

INSERT INTO dbo.MYTABLE( FirstName, LastName, DateAdded)
SELECT FirstName, LastName, NULL
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Feb 15, 2008



Hello

I've to write an trigger for the following action

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all the entries in the same table where the no_tiers is the same as the one entered (many entriers) should have those both field updated

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I've never done a trigger before

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Hi,
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versus
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Dec 8, 2006

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Feb 2, 2008

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Jul 15, 2005

greetings

I am developing an application for the marketing dept at my company.
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The save button uses the following SQL command:
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And my update button has this SQL command:

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but it doesnt seem to be updating. anyone know what I'm doing wrong?

Cheers

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Nov 24, 2005

I have a GridView on a page, It contains data from 2 joined tables and a command column to Edit/Update.  I want to update the data in only one of the tables.  If the data exists in the table to be updated there seems to be no problem (obviously).  But I get an error when trying to update a record that does not exist (I should think so).  Is there a way of Inserting the record before the update is fired?  I have tried to do an insert contained in a 'Try' in the GridView1_RowUpdating, but this does not seem to work. as I still get the same error. Object cannot be cast from DBNull to other types. 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.InvalidCastException: Object cannot be cast from DBNull to other types.
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:
[InvalidCastException: Object cannot be cast from DBNull to other types.]   System.DBNull.System.IConvertible.ToInt32(IFormatProvider provider) +54   System.Convert.ChangeType(Object value, TypeCode typeCode, IFormatProvider provider) +293   System.Web.UI.WebControls.SqlDataSourceView.AddParameters(DbCommand command, ParameterCollection reference, IDictionary parameters, IDictionary exclusionList, String oldValuesParameterFormatString) +577   System.Web.UI.WebControls.SqlDataSourceView.ExecuteUpdate(IDictionary keys, IDictionary values, IDictionary oldValues) +400   System.Web.UI.DataSourceView.Update(IDictionary keys, IDictionary values, IDictionary oldValues, DataSourceViewOperationCallback callback) +78   System.Web.UI.WebControls.GridView.HandleUpdate(GridViewRow row, Int32 rowIndex, Boolean causesValidation) +1173   System.Web.UI.WebControls.GridView.HandleEvent(EventArgs e, Boolean causesValidation, String validationGroup) +1084   System.Web.UI.WebControls.GridView.OnBubbleEvent(Object source, EventArgs e) +88   System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +35   System.Web.UI.WebControls.GridViewRow.OnBubbleEvent(Object source, EventArgs e) +117   System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +35   System.Web.UI.WebControls.LinkButton.OnCommand(CommandEventArgs e) +83   System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String eventArgument) +136   System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +172   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4839
 
Protected Sub GridView1_RowUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewUpdateEventArgs) Handles GridView1.RowUpdating
Try
Dim eventid As Integer = CInt(GridView1.Rows(GridView1.EditIndex).Cells(7).ToString)
Dim userid As Integer = CInt(hfID.Value)
Dim guests As Integer = CInt(GridView1.Rows(GridView1.EditIndex).Cells(4).ToString)
Dim attending As Boolean = CBool(GridView1.Rows(GridView1.EditIndex).Cells(5).ToString)
Dim extra As String = Server.HtmlEncode(GridView1.Rows(GridView1.EditIndex).Cells(6).ToString)
InsertRecord(eventid, userid, guests, attending, extra)
Catch ex As Exception
End Try
End Sub






Function InsertRecord(ByVal eventID As Integer, ByVal userID As Integer, ByVal guests As Integer, ByVal attending As Boolean, ByVal extra As String) As Integer
Dim connectionString As String = "server='localhost'; trusted_connection=true; Database='AFRA'"
Dim sqlConnection As System.Data.SqlClient.SqlConnection = New System.Data.SqlClient.SqlConnection(connectionString)
Dim queryString As String = "INSERT INTO [AFRAAttendance] ([EventID], [UserID], [Guests], [Attending], [Extra]) VALUES (@EventID, @UserID, @Guests, @Attending, @Extra)"
Dim sqlCommand As System.Data.SqlClient.SqlCommand = New System.Data.SqlClient.SqlCommand(queryString, sqlConnection)
sqlCommand.Parameters.Add("@EventID", System.Data.SqlDbType.Int).Value = eventID
sqlCommand.Parameters.Add("@UserID", System.Data.SqlDbType.Int).Value = userID
sqlCommand.Parameters.Add("@Guests", System.Data.SqlDbType.Int).Value = guests
sqlCommand.Parameters.Add("@Attending", System.Data.SqlDbType.Bit).Value = attending
sqlCommand.Parameters.Add("@Extra", System.Data.SqlDbType.VarChar).Value = extra
Dim rowsAffected As Integer = 0
sqlConnection.Open()
Try
rowsAffected = sqlCommand.ExecuteNonQuery
Finally
sqlConnection.Close()
End Try
Return rowsAffected
End FunctionThank you

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TIA

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Aug 22, 2004

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end if


SQL = SQL & "where MailingListID =" & Session("EID")
set mData = oConn.execute(SQL)

if strFSQL > " " then
SQL1 = "Insert into 1985ClassList " & strFSQL & "VALUES " & strVSQL
end if
set mData = oConn.execute(SQL1)

It works fine for the UPDATE, but not for the INSERT.

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Sep 1, 2004

Hi,
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Jun 4, 2008

Scenario :

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