oracle之隨機數

1、首先建立一個測試表

select * from DIM_IA_TEST1

生成隨機數

select t.*,rownum rn from  (select * from DIM_IA_TEST1 order by dbms_random.value())t;

隨機取5條

select t.*,rownum rn from  (select * from DIM_IA_TEST1 order by dbms_random.value())t where rownum<=5;

2、生成一個特定範圍的隨機數

以生成30~70範圍隨機數爲例：

select dbms_random.value(30,70) from dual;