Delete from database using datagrid

I have a datagrid that is displaying the contents of a SQL table. I am trying to add a button that will delete the selected row from the datagrid. I found the following that allows me to remove it from the grid but it is not removing it from the table of course. I am drawing a blank on how to remove from the grid and the underlying table.

foreach (DataGridViewRow row in myGrid.SelectedRows)

if (!row.IsNewRow) myGrid.Rows.Remove(row);

int selectedCount = myGrid.SelectedRows.Count;

while (selectedCount > 0)

{

if (!myGrid.SelectedRows[0].IsNewRow)

myGrid.Rows.RemoveAt(myGrid.SelectedRows[0].Index);

selectedCount--;

}