Can you perform CRUD on CouchDB view?

 private void dataGridView1_RowValidated(object sender, DataGridViewCellEventArgs e){
            SqlCommandBuilder cb;
            dt = new DataTable();
            dt = ((DataTable)dataGridView1.DataSource).GetChanges();
            if (ds != null)
            {
                cb = new SqlCommandBuilder(adp);
                adp.UpdateCommand = cb.GetUpdateCommand(true);
                adp.Update(dt);
            }

}

string newValue = "";
SqlCommand cmd;
string oldValue = "";

private void dataGridView1_CellBeginEdit(object sender, DataGridViewCellCancelEventArgs e)
{
      oldValue = dataGridView1[e.ColumnIndex, e.RowIndex].Value.ToString(); // store old value to add where 
}

  private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
    {
        SqlConnection c = new SqlConnection("Data Source=.;Initial Catalog=localdb;Persist Security Info=True;User ID=sa;Password=123");
        if (c.State != ConnectionState.Open)
        {
            c.Open();
        }
        string command = "";
        string columns = "";
        string columnName = dataGridView1.Columns[e.ColumnIndex].Name; // get column name of edited cell
        if (dataGridView1.Columns.Count != 1) // If there is only one column we dont have any where comparison, so we need oldValue of cell (we took value at cellbeginedit event)
        {
            for (int i = 0; i < dataGridView1.Columns.Count; i++)
            {
                if (i != e.ColumnIndex)
                {
                    columns += dataGridView1.Columns[i].Name + " = '" + dataGridView1.Rows[e.RowIndex].Cells[i].Value.ToString() + "' "; // compare statement according to other cells (assume that we don't have PK)
                }
                if ((i != dataGridView1.Columns.Count - 1) && (i != e.ColumnIndex))
                {
                    columns += " and ";

                }
            }
            command = "Update "+ ds.Customer.TableName +" set " + columnName + "=@newValue where " + columns;
        }
        else
        {
            command = "Update  " + ds.Customer.TableName + "  set  " + columnName + "=@newValue where ColumName=" + "'" + oldValue + "'";
        }
        newValue = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString(); //our new parameter.
        cmd = new SqlCommand(command, c);
        cmd.Parameters.AddWithValue("@newValue", newValue);
        cmd.ExecuteNonQuery();
        c.Close();

}

newDoc !== null && oldDoc === null

newDoc !== null && oldDoc !== null

newDoc._deleted === true