Oracle 快速插入1000萬條數據的實現方式

1、使用dual配合connect by level

create table BigTable as 
select rownum as id
from dual
connect by level <= 100000;

但是有connect by level有上限,如果超出上限,系統會報,"connect by level"內存不足,我試過1000000萬數據可以,但是再多就不行了。

 

2、 使用xmltable,"CONNECT BY 操作內存不足,10g開始支持XML后，改為xmltable就可以了",代碼如下:

create table bigdata as 
select rownum as id from
xmltable('1 to 10000000');

ok,1000萬數據完美插入