Help - delete data from table

We can't help you with anything specific - your question is just too vague, and we have no idea where you might be stuck.

But basically, you need to issue an SQL Command using the DELETE syntax with a BETWEEN condition in the WHERE clause:

DELETE FROM MyTable WHERE myDateColumn BETWEEN startDate AND endDate

This may help:

Using con As New SqlConnection(strConnect)
    con.Open()
    Using com As New SqlCommand("DELETE FROM MyTable WHERE myDateColumn BETWEEN @START AND @END", con)
        com.Parameters.AddWithValue("@START", mystartDateTime)
        com.Parameters.AddWithValue("@END", myEndDateTime)
        com.ExecuteNonQuery()
    End Using
End Using