Question

I’m trying to insert 10000 values into Oracle from C# and am using the code below. It is VERY important that the order of the values in the array that I pass in are maintained in Oracle, however every time I run this the order of the values changes. What can I change to stop the order changing, or is there a completely different approach that I can use to insert 10000 values in a set order that can be retrieved easily?

The datalist is an array of type double and size 10000.

var oc = new OracleConnection(ConnectionString);
oc.Open();
var transaction = oc.BeginTransaction();
OracleCommand command = new OracleCommand("",oc);
command.CommandText = ("INSERT INTO DEMO (DISTRIBUTIONSLICES) values (:DISTRIBUTIONSLICES)");

OracleParameter distributionslices = new OracleParameter("DISTRIBUTIONSLICES",OracleDbType.Varchar2, ParameterDirection.Input);

distributionslices.Value = datalist;

command.Parameters.Add(distributionslices);
command.ArrayBindCount = 10000;

command.ExecuteNonQuery();

Any help would be greatly appreciated.

Answer 1

• Create a sequence in database(lets name it seq).
• Alter table add (seq_id number);
• INSERT INTO DEMO (DISTRIBUTIONSLICES, seq_id) values
  (:DISTRIBUTIONSLICES, seq.nextval())

• select in this way:

  Select *
  from demo
  order by seq_id