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create table SYS_MESSAGE
(
ID NUMBER not null PRIMARY KEY,
M_TYPE VARCHAR2(10) not null,
TITLE VARCHAR2(200),
CONTENT LONG,
M_TIME VARCHAR2(50),
AUTHOR VARCHAR2(20)
);
CREATE SEQUENCE SYS_MESSAGE_ID_SEQ
INCREMENT BY 1
START WITH 1
NOMAXVALUE
MINVALUE 1
CACHE 50
;

CREATE OR REPLACE TRIGGER SYS_MESSAGE_ID_TRIGGER
BEFORE INSERT ON SYS_MESSAGE
FOR EACH ROW
WHEN (NEW.ID IS NULL)
BEGIN
SELECT SYS_MESSAGE_ID_SEQ.NEXTVAL INTO:NEW.ID from DUAL;
END;


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28.2.4 °²×°Oracle 11g

28.2.4  °²×°Oracle 11g
Oracle 11gÌṩÁËͼÐλ¯µÄ°²×°½çÃæ£¬Óû§¿Éͨ¹ýÒÆ¶¯ºÍµ¥»÷Êó±êÍê³É°²×°¹ý³Ì¡£¾ßÌå°²×°²½ÖèÈçÏÂËùʾ¡£
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doc  inst ......

oracle archive mode ¹éµµ

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28.4.1 ÊÖ¹¤Æô¶¯ºÍ¹Ø±ÕOracle·þÎñ

28.4.1  ÊÖ¹¤Æô¶¯ºÍ¹Ø±ÕOracle·þÎñ
OracleÊý¾Ý¿â·þÎñÓÉÁ½²¿·Ö×é³É£ºÊý¾Ý¿â½ø³ÌºÍÍøÂç¼àÌýÆ÷½ø³Ì£¬ËüÃÇ·Ö±ð¿Éͨ¹ýsqlplusºÍlsnrctlÃüÁî¿ØÖÆÆô¶¯¹Ø±Õ¡£
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$ ps -ef|grep orcl
orac ......

²é¿´oracleµÄϵͳÎļþÄÚÈÝ

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SQL> DESC v$controlfile
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