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create sequence ÐòÁÐÃû
minvalue 1(ÉèÖÃ1Ϊ×îСֵ)
maxvalues 1.0E28(orcale ĬÈÏ×î´óֵΪ1.0E28)
start with 1 ( ³õʼֵΪ1)
increment by 1 (²½³¤Îª1 ,Ò²¾ÍÊÇÿ´ÎÔö¼Ó1)
noorder (Õâ¸öÊÇÉèÖÃΪ ²»ÅÅÐò)
nocycle (Õâ¸öÊÇÉèÖÃΪ ²»Ñ»·)
nocache(Õâ¸öÊÇÉèÖÃΪ ûÓлº³å)
È»ºóÊÇ´´½¨Ò»¸ö´¥·¢Æ÷£º
create trigger ´¥·¢Æ÷Ãû before insert on ±íÃû for each row
as
begin
select ÐòÁÐÃû.nextval into :new.id from dual;
end;
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