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CREATE TABLE SYSTEM.LOGIN_LOG
(
SESSION_ID NUMBER(8,0) NOT NULL,
LOGIN_ON_TIME DATE,
LOGIN_OFF_TIME DATE,
USER_IN_DB VARCHAR2(50),
MACHINE VARCHAR2(50),
IP_ADDRESS VARCHAR2(20),
RUN_PROGRAM VARCHAR2(50)
)
PCTFREE 10
PCTUSED 40
MAXTRANS 255
TABLESPACE SYSTEM
STORAGE(INITIAL 64K MINEXTENTS 1 MAXEXTENTS 2147483645 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
NOCACHE
LOGGING
/
COMMENT ON TABLE SYSTEM.LOGIN_LOG IS 'µÇ¼ÈÕÖ¾'
/
COMMENT ON COLUMN SYSTEM.LOGIN_LOG.SESSION_ID IS 'sessionid'
/
COMMENT ON COLUMN SYSTEM.LOGIN_LOG.LOGIN_ON_TIME IS 'µÇ¼ʱ¼ä'
/
COMMENT ON COLUMN SYSTEM.LOGIN_LOG.LOGIN_OFF_TIME IS 'µÇ³öʱ¼ä'
/
COMMENT ON COLUMN SYSTEM.LOGIN_LOG.USER_IN_DB IS 'µÇ¼µÄDB User'
/
COMMENT ON COLUMN SYSTEM.LOGIN_LOG.MACHINE IS '»úÆ÷Ãû'
/
COMMENT ON COLUMN SYSTEM.LOGIN_LOG.IP_ADDRESS IS 'IPµØÖ·'
/
COMMENT ON COLUMN SYSTEM.LOGIN_LOG.RUN_PROGRAM IS '½ÓÈë³ÌÐò'
/
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set echo on --ÊÇ·ñÏÔʾִÐеÄÃüÁîÄÚÈÝ
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set pagesize 1000 ......
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An explain plan is a representation of the access path that is taken when a query is executed within Oracle.
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At the physical level Oracle reads blocks of data. The smallest amount of data read is a single Oracle block, the largest is con ......
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create table person (pid int,name varchar2(20) unique,
age int check(age between 0 and 150),sex varchar(4) default 'ÄÐ',tp int,
address varchar(200),constraint person_pid_pk primary key(pid));
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insert into person values(0011,'ÁõÈý½ã',25,'ÄÐ',13930123021,'ºÓ±±Ê¡ÇúÑôÏØ');
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