Oracle»ù´¡Óï¾ä
1¡¢
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connect uuu/ooo
connect
sys/ok as sysdba
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create tablespace stu(±í¿Õ¼äÃû
) datafile
‘
e:\stu.dbf
’
size 100m autoextend on next 5m maxsize 500m;
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drop tablespace stu including contents and datafiles;
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create user uuu(Óû§Ãû
) identified by uuu(
ÃÜÂë
) default tablespace stu(
±í¿Õ¼äÃû
);
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alter user uuu identified by ppp(xÐÂÃÜÂë
);
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drop user uuu casoade;
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alter user uuu account lock;
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alter user uuu account unlock;
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grant all to uuu(Óû§Ãû
);
//ÊÚȨËùÓÐȨÏÞ
grant create session to uuu;
//ÊÚȨÁ¬½ÓÊý¾Ý¿âȨÏÞ
grant connect,resource to uuu;
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select * from user_sys_privs;
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revoke all from uuu;
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create table STUDENT
(
STUNO VARCHAR2(20) not null,
STUNAME VARCHAR2(50),
BIRTHDAY DATE,
XUELI VARCHAR2(10),
SEX INTEGER
)
tablespace STUDB
;
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drop table student;
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alter table student
add constraint
pk_stuno
primary key(stuNo);
´´½¨check
Ô¼Êø
alter table
student
add constraint
ck_name
check (
saly>100
);
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alter table STUDENT add constraint FK_SEX foreign key (SEX) refe
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1) select * from (select * from tablename order  ......
The following are number examples for the to_char
function.
to_char
(1210.73,
'9999.9')
would return '1210.7'
to_char
(1210.73,
'9,999.99')
would return '1,210.73'
to_char
(1210.73,
'$9,999.00')
would return
'$1,210.73'
to_char
(21,
'000099')
would return '000021'
The foll ......
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CREATE TABLE example(
ID Number(4) NOT NULL PRIMARY KEY,
NAME VARCHAR(25 ......
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(1)¿é:ÊÇÁ£¶È×îСµÄ´æ´¢µ¥Î»,ÏÖÔÚ±ê×¼µÄ¿é´óСÊÇ8K,ORACLEÿһ´ÎI/O²Ù×÷Ò²Êǰ´¿éÀ´²Ù×÷µÄ,Ò²¾ÍÊÇ˵µ±ORACLE´ÓÊý¾ÝÎļþ¶ÁÊý¾Ýʱ,ÊǶÁÈ¡¶àÉÙ¸ö¿é,¶ø²»ÊǶàÉÙÐÐ.
(2)Çø:ÓÉһϵÁÐÏàÁÚµÄ¿é¶ø×é³É,ÕâÒ²ÊÇORACLE¿Õ¼ ......