har ima oracle varchar2 int rac all creat ora

[Oracle]快速構造大量數據的方法：

create table tab001(id integer primary key, val varchar2(100));

insert into tab001
select i+j,rpad(to_char(i+j),100,‘A‘)
from (
with DATA2(j) as (
select 0 j from DUAL
union all
select j+1000 from DATA2 where j < 999000

)
select j from DATA2
),
(
with DATA1(i) as (
select 1 i from DUAL
union all
select i+1 from DATA1 where i < 1000
)
select i from DATA1
);

[Oracle]快速構造大量數據的方法