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ADO.NET code to update a temporary table

Hi,

I have some simple code below and I would like to get some ADO.NET code to update a temporary table. Hopefully using Datasets / data tables.

Thanks,

Ward

SqlConnection myConn = new SqlConnection("Data Source=localhost\\SQLEXPRESS;Initial Catalog=CarDB;Integrated Security=True;database=CarDB");
            string str = "create table #temp1 (col1 int, col2 int);";
 
            // Code to do a dataset to insert some records.
            
            SqlCommand myCommand = new SqlCommand(str, myConn);

            myConn.Open();
            myCommand.ExecuteNonQuery();
            myCommand.CommandText = "drop table #temp1;";
            myCommand.ExecuteNonQuery();

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redpipe

Can you say something about why you are using temporary tables and what you are trying to achieve trough your code? Such information will greatly help in giving you a to-the-point answer :)

You do not need to CREATE local temporary tables. In stead you just SELECT...INTO them. See the following article for basic tips on usage of SQL Servers local temp tables:
http://weblogs.sqlteam.com/mladenp/archive/2006/11/03/17197.aspx

Many of the operations done by local temporary tables, that only exists in memory for a given session, can be done more effectively by using derived tables directly in the FROM part of your SELECT statement. A strategy many argue can give increased performance. An example of this is given in this aritcle http://www.sql-server-performance.com/articles/per/derived_temp_tables_p1.aspx

Hope this helps you on your quest..?

whorsfall

ASKER

Hi,

Thanks for your response. Ok I am building a data acquision application which needs to sample data at a high rate and record for later analysis. We estimate we need to store 400 results at 100 times per second.

So I am trying to find the fastest method to achieve this throughput. This why I was thinking about temporary tables.

I would even be happy with something that can run put it all in memory and only take a shoryt amount of time to save to disk.

Ward.

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redpipe

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whorsfall

ASKER

Hi,

Thanks for the great response - have you tried DB4o it sounds impressive?

thanks,

Ward

redpipe

No I have not tried it myself. But I've heard great things from a friend of a friend