bulkCopy.DestinationTableName = "TEMP_EMPLOYEES"; bulkCopy.BatchSize = 500; bulkCopy.WriteToServer(dt);

using (OracleConnection conn = new OracleConnection(connStr))

while (reader.Read()) Console.WriteLine(reader["last_name"]);

using (OracleConnection conn = new OracleConnection(connStr))

while (reader.Read()) Console.WriteLine($"reader["first_name"] reader["last_name"]");

conn.Open(); OracleTransaction tx = conn.BeginTransaction(); try OracleCommand cmd = conn.CreateCommand(); cmd.Transaction = tx; cmd.CommandText = "UPDATE accounts SET balance = balance - 100 WHERE id = 1"; cmd.ExecuteNonQuery(); cmd.CommandText = "UPDATE accounts SET balance = balance + 100 WHERE id = 2"; cmd.ExecuteNonQuery(); tx.Commit(); catch tx.Rollback(); throw;

conn.Open(); OracleCommand cmd = new OracleCommand("GET_EMPLOYEES_BY_DEPT", conn); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add("p_dept_id", OracleDbType.Int32).Value = 30; cmd.Parameters.Add("p_cursor", OracleDbType.RefCursor).Direction = ParameterDirection.Output; using (OracleDataReader reader = cmd.ExecuteReader())