在 Oracle 中插入一百万行的最快方法

How can I insert more than a million rows in Oracle in optimal way for the following procdeure? It hangs if I increase FOR loop to a million rows.

create or replace procedure inst_prc1 as
   xssn number;
   xcount number;
   l_start Number;
   l_end Number;
   cursor c1 is select max(ssn)S1 from dtr_debtors1;

Begin
  l_start := DBMS_UTILITY.GET_TIME;
  FOR I IN 1..10000 LOOP
    For C1_REC IN C1 Loop
      insert into dtr_debtors1(SSN) values (C1_REC.S1+1);
    End loop;
  END LOOP;
  commit;
  l_end := DBMS_UTILITY.GET_TIME;
  DBMS_OUTPUT.PUT_LINE('The Procedure  Start Time is '||l_start);
  DBMS_OUTPUT.PUT_LINE('The Procedure End Time is '||l_end); 
End inst_prc1;

推荐答案

您的方法将导致内存问题.最快的方法是[在大卫的评论后编辑查询以处理空场景]:

insert into dtr_debtors1(SSN)
select a.S1+level
   from dual,(select nvl(max(ssn),0) S1 from dtr_debtors1) a
connect by level <= 10000