Question

I have records in table1, if the records exist, it must copy into table2. I want to delete those records in a table1 once all the records are copied into another table2. Im still a beginner in database and with some researches, i found some tutorials on d internet how to connect with database, and the codes easy to understand so i came out with this program.This codes only do the copy part and i’m still lack of the delete part. Can help me figure out how to do the delete part? i found 2 reference in msdn, but i’m not sure and not understand on the codes given.

 
try
{
 //create connection
 System.Data.SqlClient.SqlConnection sqlConnection1 =
    new System.Data.SqlClient.SqlConnection("Data Source=.dbname;Integrated Security=True;User Instance=True");
 //command queries
 System.Data.SqlClient.SqlCommand cmd = new System.Data.SqlClient.SqlCommand();
 cmd.CommandType = System.Data.CommandType.Text;
 cmd.CommandText = "INSERT INTO tblSend (ip, msg, date) SELECT ip, msg, date FROM tblOutbox";
 cmd.Connection = sqlConnection1;
 sqlConnection1.Open(); //open con
 cmd.ExecuteNonQuery(); //execute query
 sqlConnection1.Close(); //close con
}
catch (System.Exception excep)
{
  MessageBox.Show(excep.Message);
}

If i replace the query into this: //cmd.CommandText = "DELETE tblSend WHERE id = 5";
its only delete one rows. But what if many records involved? Do i need to consider the EOF things? DO i need to use DataGridView? Becoz the code i did didn't use DataGridView at all. i dont want the records to be displayed, i just want it to running behind.

Answer 1

If I understand correctly you need all data from table1 in table2 and then delete table1.

Options

1) It you need it once you could rename table1 to table2 and recreate table1

-- move the records to table 2, ok I assume it does not exist;)
RENAME TABLE table1 TO table2;
-- Create new table1 with same structure as table 2
CREATE TABLE table1 AS SELECT * FROM table2 WHERE 1=2;

2) Do a separate copy and delete assuming you have something like a primary key

-- copy the records
INSERT table2(field1, field2, ...) SELECT field1, field2, ... FROM table1;
-- and delete them 
DELETE FROM table1;

3) Do it using C# but as this seems a database problem to me I would not go that far in pulling all the records to the client and then throwing them back.