http://www.brentozar.com/archive/2009/09/whats-on-my-bookshelf/
rc = SQLExecDirect(hstmt, "SELECT <20 columns> FROM employees " + "WHERE HireDate >= ?", SQL_NTS); do { rc = SQLFetch (hstmt); /* Call SQLGetData 20 times */ } while ((rc == SQL_SUCCESS) || (rc == SQL_SUCCESS_WITH_INFO));