问题集今日

oracle中各种连接事例，left join、right join、full join
https://www.cnblogs.com/yeyerl/p/7682081.html

Oracle数据库over函数的使用
https://www.cnblogs.com/heyanan/p/10057242.html

oracle to_date

   <if test="dateHoho!= null and dateHoho != '' ">
            and to_date(#{dateHoho},'yyyy-MM-dd') between t.date_start and t.date_end
   </if>