connection.Open();
        adapter.SelectCommand = commandSecond;
        adapter.UpdateCommand = new OleDbCommand("UPDATE PlayerSkill SET [Поле1] = 3,[Поле2] = 3,[Поле3] = 3,[Поле4] = 3 WHERE [Код] = 1;", connection);
        adapter.Update(dataSetSecond);
        adapter.UpdateCommand = new OleDbCommand("UPDATE PlayerSkill SET [Поле1] = 3,[Поле2] = 3,[Поле3] = 3,[Поле4] = 3 WHERE [Код] = 2;", connection);
        adapter.Update(dataSetSecond);
        connection.Close();

string tableNameSecond;
    string tableNameFirst;
    string dataBasePath;
    string dataBaseName;
    OleDbConnection connection;
    OleDbDataAdapter adapter;
    OleDbCommand commandSecond;
    OleDbCommand commandFirst;
    DataSet dataSetFirst;
    DataSet dataSetSecond;

// Доп таблица
        connection.Open();
        adapter.SelectCommand = commandSecond;
        dataSetSecond = new DataSet();
        adapter.Fill(dataSetSecond);
        dataGridView2.DataSource = dataSetSecond.Tables[0];
        adapter.Update(dataSetSecond);

        // Основная таблица
        tableNameFirst = comboBox1.Text + " - " + comboBox2.Text;
        commandFirst = new OleDbCommand("SELECT * FROM [" + tableNameFirst + "];", connection);
        adapter.SelectCommand = commandFirst;
        dataSetFirst = new DataSet();
        adapter.Fill(dataSetFirst);
        dataGridView1.DataSource = dataSetFirst.Tables[0];
        adapter.Update(dataSetFirst);
        connection.Close();