public static int DelBookInfo(string bookid)
{
string sql = "delete from Book where BookID = '" + bookid + "'";
return(DBAccess.ExecuteNonQuery(sql));
}
public static int DelStuInfo(string stuid)
{
string sql = "delete from Student where StuID = '" + stuid + "'";
return(DBAccess.ExecuteNonQuery(sql));
}