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ORACLEûÓÐÏóSQL SERVERÖÐÒ»ÑùµÄ×ÔÔö¼Ó×ֶΣ¬ÒªÊµÏÖÖ»ÄÜͨ¹ýSEQUENCEÀ´ÊµÏÖ
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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ÏȽ¨±í¡¢ÔÙ½¨ÐòÁС¢È»ºóÊÇ´¥·¢Æ÷£¬×îºó²âÊÔ=============================================
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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;
Oracle8iÒýÈëÁËSYS_GUIDÕâ¸ö¸ÅÄËüͬOracle¹ÜÀíÔ±ËùʹÓõĴ«Í³µÄÐòÁУ¨sequence£©Ïà±È¾ßÓÐÖî¶àÓÅÊÆ¡£Ò»¸öÐòÁÐÉú³ÉÆ÷Ö»ÊǼòµ¥µØ´´½¨´Ó¸ø¶¨µÄÆðµã¿ªÊ¼µÄһϵÁÐÕûÊýÖµ£¬¶øÇÒËü±»ÓÃÔÚÑ¡Ôñ³ÂÊöʽµÄʱºò×Ô¶¯µØµÝÔö¸ÃϵÁС£
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OracleÊý¾Ý¿âÓαê

OracleÊý¾Ý¿âÓαêʹÓ÷½·¨
2009-12-30 15:27
SQLÊÇÓÃÓÚ·ÃÎÊOracleÊý¾Ý¿âµÄÓïÑÔ£¬PL/SQLÀ©Õ¹ºÍ¼ÓÇ¿ÁËSQLµÄ¹¦ÄÜ£¬ËüͬʱÒýÈëÁ˸üÇ¿µÄ³ÌÐòÂß¼­, ÏÂÃæÔÚ±¾ÎÄÖн«¶ÔÓαêµÄʹÓýøÐÐһϽ²½â,Ï£Íû¿ÉÒԺʹó¼Ò¹²Í¬Ñ§Ï°½ø²½¡£ 
¡¡¡¡Óαê×ÖÃæÀí½â¾ÍÊÇÓζ¯µÄ¹â±ê¡£ÓαêÊÇSQLµÄÒ»¸öÄڴ湤×÷Çø£¬ÓÉϵͳ»òÓû§ÒÔ±äÁ¿µÄÐÎ ......

oracle online documentation

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 ......

oracle %type

1¡¢Ê¹ÓÃ%TYPE
ÔÚÐí¶àÇé¿öÏ£¬PL/SQL±äÁ¿¿ÉÒÔÓÃÀ´´æ´¢ÔÚÊý¾Ý¿â±íÖеÄÊý¾Ý¡£ÔÚÕâÖÖÇé¿öÏ£¬±äÁ¿Ó¦¸ÃÓµÓÐÓë±íÁÐÏàͬµÄÀàÐÍ¡£ÀýÈ磬students±íµÄfirst_nameÁеÄÀàÐÍΪVARCHAR2(20),ÎÒÃÇ¿ÉÒÔ°´ÕÕÏÂÊö·½Ê½ÉùÃ÷Ò»¸ö±äÁ¿
DECLARE
v_FirstName VARCHAR2(20);
µ«ÊÇÈç¹ûfirst_nameÁеĶ¨Òå¸Ä±äÁ˻ᷢÉúʲô£¨±ÈÈç˵±í¸Ä±äÁË£¬first ......

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 ÔÚ´¦ÀíÊý¾Ýʱ·¢ÏÖÒ»¸öÎÊÌ⣬Oracle¶ÔÓÚСÓÚ1µÄСÊý£¬Ð¡ÊýµãÇ°ÃæµÄ0ÊDz»ÏÔʾµÄ¡£
 
SQL> create table t1_number (num number);
Table created
 
SQL> insert into t1_number values(0.3268);
1 row inserted
 
SQL> insert into t1_number values(0.57965686);
1 row inserted
&nb ......
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