快速生成大量模擬數據的方法：

create table TEST(id integer, TEST_NUMBER NUMBER(18,6));

insert into TEST

select i+j, i+j

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

);

這是生成10萬條數據

如果生成1000完條數據，則變成：

create table TEST(id integer, TEST_NUMBER NUMBER(18,6));

insert into TEST

select i+j, i+j

from? (

with DATA2(j) as (

select 0 j from DUAL

union all

select j+1000 from DATA2 where j < 99990000

)

select j from DATA2

),

(

with DATA1(i) as (

select 1 i from DUAL

union all

select i+1 from DATA1 where i < 10000

)

select i from DATA1

);

本文轉自健哥的數據花園博客園博客，原文鏈接：http://www.cnblogs.com/gaojian/p/7596248.html，如需轉載請自行聯系原作者

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