SQL语句比较时间大小

//时间比较-----BETWEEN
strBufAppSQL.append(" AND (str_to_date(srt.crt_dttm,'%Y-%m-%d %H:%i:%s') BETWEEN '" + srtQueryVO.getBeginTime() +"'  AND '" + srtQueryVO.getEndTime() + "') ");

//大于或小于某个时间
strBufAppSQL.append(" and srt.crt_dttm > str_to_date('").append(srtQueryVO.getBeginTime())
.append("','%Y-%m-%d %H:%i:%s')");
strBufAppSQL.append(" and srt.lastupt_dttm < str_to_date('").append(srtQueryVO.getEndTime())
.append("','%Y-%m-%d %H:%i:%s')");