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  • [Oracle]快速构造大量数据的方法

    [Oracle]快速构造大量数据的方法:

    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
             );

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  • 原文地址:https://www.cnblogs.com/gaojian/p/huge_data.html
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