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1.´´½¨ÐòÁУº
create sequence your_seq
nocycle
maxvalue 9999999999
start with 1;
2.ʹÓô¥·¢Æ÷ʵÏÖ×ÔÔö£º
create or replace trigger your_seq_tri
before insert on your_table1 for each row
declare
next_id number;
begin
select your_seq.nextval into next_id from dual;
:new.id := next_id;
end;
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--2003-10-8 15:53
=============================================
conn scott/tiger@powermis
drop table foo;
create table foo(
id number primary key,
data varchar2(100));
create sequence foo_seq;
create or replace trigger bifer_foo_id_pk
before insert
on foo
for each row
begin
select foo_seq.nextval into :new.id from dual;
end;
/
insert into foo(data)
values('Chirstopher');
insert into foo(id,data)
values(5,'Sean');
select * from foo;
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extent--×îС¿Õ¼ä·ÖÅ䵥λ --tablespace management
block --×îСi/oµ¥Î» --segment management
create tablespace james
datafile '/export/home/oracle/oradata/james.dbf'
size 100M ¡¡¡¡¡¡¡¡¡¡¡¡--³õʼµÄÎļþ´óС¡¡
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oracle 9i online documentation:
http://www.oracle.com/pls/db92/db92.docindex?remark=homepage
oracle 10g online documentation:
http://www.oracle.com/pls/db102/homepage
oracle 11g online documentation:
http://www.oracle.com/pls/db111/homepage ......
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DECLARE
v_FirstName VARCHAR2(20);
µ«ÊÇÈç¹ûfirst_nameÁеĶ¨Òå¸Ä±äÁ˻ᷢÉúʲô£¨±ÈÈç˵±í¸Ä±äÁË£¬first ......