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oracle¸´Ï°£¨Ò»£© Ö®OracleÌåϵ½á¹¹

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Óï·¨£ºselect rpad('12345678',1,'0') from dual; 
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Oracle ×ÜÕÊÄ£¿éµÄÒ»¸ö»á¼ÆÒµÎñÖÜÆÚÈçÏÂ:
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create sequence users_seq;
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create or replace trigger bifer_users_userid_pk
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on users
for each row
begin
select users_seq.nextval into:new.userid from ......
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