SQL 返回期间内的所有日期
实现代码如下:select rownum as dateIndex,to_date('20090701','yyyy-mm-dd')+ rownum-1 AS DATE_ FROM DUAL CONNECT BY LEVEL >= 1 AND LEVEL <=(TO_DATE('2009
实现代码如下:select rownum as dateIndex,to_date('20090701','yyyy-mm-dd')+ rownum-1 AS DATE_ FROM DUAL CONNECT BY LEVEL >= 1 AND LEVEL <=(TO_DATE('2009
SQL语句如下: 实现代码如下:WITH 表1 AS ( SELECT 编号字段名, ROW_NUMBER() OVER(ORDER BY 排序字段名 DESC) AS RowNum FROM 表名 ) Update 表1 SET 编号字段名=RowNum 应用场景: 通过这样的SQL语句根据小
实现代码如下:select nid,ntitle,nreadtimes,Row_number() over(order by nreadtimes desc) as rownum from article
利用oracle的dbms_random包结合rownum来实现,示例如下,随机取499户: select * from ( select * from busi.t_ar_userinfo order by dbms_random.value) where rownum @/ORACLE_HOME