Batch Inserts From DataTable

Jun 24, 2005

Please help guys,I have a DataTable filled from the parsing of a csv file by the OleDb text driver.This DataTable could on occassion contain in excess of 2000 rows.I want to be able to batch the inserts to my backend sql table and be able to recorver on errors during the insert.i.e, maybe send the first 500 rows to insert via an insert dynamic text.... really don't know the optimal insert technic to use.but, if I get an error on say the third batch, I want to be able to recorver, and not have to start all over again and continue the inserts from the batch that failed.....Please help... what is the best way to perform the inserts and how can I track these inserts and recorver on errors like power failures or sql server unavailable etc.Please help....

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T-SQL (SS2K8) :: Bulk Inserts In Batch?

Jun 16, 2015

I have a table with 370 million rows and 50+ columns. I need to change the data type of a column from character to numeric. Here's what it contains:

40 million with numbers I want to keep, the rest I just want to set to null:

4k with alpha characters
55 million other numbers
275 million empty strings

An alter column statement fails not just on the alpha characters but on the empty strings. So I tried a couple things on a test database to get an idea of the time it would take:

An update statement to clear out the non-numeric data is too slow (~1.5 days, batched 10000 at a time). I think I probably should create a new column anyway though, so I'm going to copy the data to a new table since it would be faster than adding a new column to the original table.

An insert ... select ... takes about 12 hours; adding WITH (TABLOCK) didn't seem to have any effect, and I'm not sure how to batch it. Recovery model is simple.

A select ... into ... only takes about 1 hour, but can't be batched.

Using a 3rd party ETL tool takes about 5 hours, batched.

I wanted to batch it to minimize impact on other queries but primarily the logs. Is there any way to do a fast batched bulk transfer within SSMS?

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Nov 14, 2006

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I was wondering if anyone has faced similar problem before. Are there any conifguration changes I can make to the replication infrastructure to reduce latency?

Would appreciate your help.

Thanks.

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Sep 3, 2007

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Thanks

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Aug 7, 2007

HELP,

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Please help

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Dec 11, 2006

Hi I am trying to use the results of a datatable as an input to a ne SQL statement.
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possibley of interest is that I would have like to have done this in 1 SQL but the results in Mydatatable are from a SELECT DISTINCT and Field1 is a text filed that can't be used in a DISTINCT statement, hence using two statements.  
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Jun 28, 2006

Hi,
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 Here is the code.
Private Function GetAvailableTutors(ByVal qualifiedTutorsDataSet As DataTable) As DataTable
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Dim myCommand As SqlCommand = _
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the usual way to bid a gridview is to data soursce
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Dec 27, 2006

Hi,
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        }
    }
 
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        {
            DataRow MyRow = DT.NewRow();
            MyRow["Col1"] = i;
            DT.Rows.Add(MyRow);
        }
    }
}
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Rob

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Mar 20, 2006

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Aug 7, 2007



Hi...

In my appllication, i am having a DataTable... For that DataTable i have to write a query for a expression... This epression is more of mathematical expression type. Here is the sample expression-


(column1 < 1 && (column2 = 2 || column3 > 5) || column4 != 3)

How i can write a query for such a equation...? Is it possible to use logical & mathematical operator in the equation & to write a query for this type of equation... Is there is any good article on this...

Thanks in adavnce...

IamHuM










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Mar 4, 2007

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Jul 23, 2007

I'm trying this code but nothing is being displayedSqlConnection conn = new SqlConnection(ConfigurationManager.AppSettings["STRING_CON"]);
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DataRow dr;
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Jul 24, 2007

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Nov 11, 2007

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Jan 8, 2008

I am quite new to ASP.net 2.0. I have had plenty of experience using ADO.net in standard windows applications.
In my app I am opening a connection to an SQL database and I am creating a DataTable without a DataSet:
Shared m_cnADONetConnection As New System.Data.SqlClient.SqlConnection
Shared m_daDataAdapter As System.Data.SqlClient.SqlDataAdapter
Shared m_rowPosition As Integer
Shared m_dtContacts As New System.Data.DataTable
I am initializing everything and filling my DataTable when the Page first Loads if it isnt a postback.Protected Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Form1.Load
If Not Page.IsPostBack Then
m_rowPosition = 0
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Me.ShowCurrentRecord()
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I also have record navigation buttons on my form: << < > >> Moving me from record to record (row to row) by incrementing or decrementing m_rowPosition
All is good! I am able navigate the DataTable and the textboxes change their text properties accordingly from record to record.
The only other control on my form is a button which I'm coding its click event to save changes that I made to the current row (record) by changing the values in the textboxes then clicking save.
 Here is my code:Protected Sub ButtonSave_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles ButtonSave.Click
If m_dtContacts.Rows.Count <> 0 Then
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m_dtContacts.Rows(m_rowPosition)("Price") = TBPrice.Textm_dtContacts.Rows(m_rowPosition)("LastReadOn") = TBLastReadOn.Textm_dtContacts.Rows(m_rowPosition)("PageCount") = TBPageCount.Text
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m_dtContacts.Rows(m_rowPosition).EndEdit()
m_dtContacts.AcceptChanges()
m_daDataAdapter.Update(m_dtContacts)
End Sub
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However, when I close the page and exit out of Visual Web Developer and reopen the database: THE CHANGES WERENT UPDATED!!!
 This worked all the time in VB2005.net when developing a standard windows app.
Can I use the same approach I was using in my code above or am I missing something. 
 
I have read and searched all over and what I'm thinking is that my UpdateCommand, InsertCommand, DeleteCommand, SelectCommand are empty.
Do I have to do it this way?
 
 
 
 
 
 
 

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May 10, 2008

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Apr 21, 2006

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Jun 16, 2008

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Cheers.

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}
}


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