Создание базы данных Oracle

using System.Data.OleDb;

OleDbConnection con = new OleDbConnection("Provider=MSDAORA; Data Source=XE;User ID=system;Password=admin;Unicode=True");
private void Form1_Load(object sender, EventArgs e)
        {
            con.Open();
            OleDbDataAdapter oda = new OleDbDataAdapter("SELECT * FROM hr.employees ORDER BY salary", con);
            DataTable dt = new DataTable();
            oda.Fill(dt);
            dataGridView1.DataSource = dt;
            con.Close();
        }

string conString = "User Id=hr; password=hr;" +
 
//EZ Connect Format is [hostname]:[port]/[service_name]
//Examine working TNSNAMES.ORA entries to find these values
"Data Source=localhost:1521/pdborcl; Pooling=false;";
 
//Create a connection to Oracle
 
OracleConnection con = new OracleConnection();
con.ConnectionString = conString;
con.Open();
 
//Create a command within the context of the connection
//Use the command to display employee names and salary from Employees table
OracleCommand cmd = con.CreateCommand();
cmd.CommandText = "select first_name from employees where department_id = 60";
 
//Execute the command and use datareader to display the data
OracleDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
     MessageBox.Show("Employee Name: " + reader.GetString(0));           
}