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create tablespace ±í¿Õ¼äÂß¼Ãû datafile '±í¿Õ¼äÎļþµÄÎïÀíÂß¼'
size Îļþ´óС£¨È磺10m£© autoextend ÊÇ·ñ×Ô¶¯Ôö³¤Îļþ´óС£¨on/off£©;
4.´´½¨Óû§£ºcreate user Óû§Ãû identified by ÃÜÂ룻
5.Óû§ÊÚȨ£ºgrant connect to Óû§Ãû --------±íʾÊÚÓèÓû§Á¬½ÓµÄȨÏÞ
grant dba to Óû§Ãû ------±íʾÊÚÓè¹ÜÀíÔ±µÄȨÏÞ
grant resource to Óû§Ãû -----±íʾ´´½¨Ò»¸öȨÏÞ¶ÔÏó
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conn admin/admin;
--Á¬½Óµ±Ç°Óû§
conn yangjian/yangjian;
--ÐÞ¸ÄÓû§ÃÜÂë
alter user system identified by system;
--ɾ³ýÓû§(cascadeɾ³ýģʽ¶ÔÏó)
drop user admin cascade;
6.exit -----Í˳öÁ¬½Ó
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create table ±íÃ÷
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sid varchar2(20), --varchar2±íʾ¶¯Ì¬µÄ×Ö·ûÀàÐÍ
sage int ----Êý×ÖÀàÐÍ
£©;
--ɾ³ý±í¿Õ¼ä
Drop tablespace spac
--Ð޸ıí
--1.Ϊָ¶¨µÄ±íÌí¼ÓÒ»ÁÐ
alter table student add(score varchar2(3))
--2.ÐÞ¸ÄÖ¸¶¨ÁÐ
alter table student modify(score number(3,1))
--3.ɾ³ýÖ¸¶¨µÄÁÐ
alter table student drop column score
--4.²é¿´Ö¸¶¨±íµÄ½á¹¹
desc student
--ɾ³ý±í
--1.ֻɾ³ý±íÖеÄËùÓÐÊý¾Ý£¬±£Áô±íµÄ½á¹¹
truncate table student
delete student;
--2.ɾ³ýÕû¸ö±í£¬°üÀ¨±íµÄÕû¸ö½á¹¹
drop table student
8.show user ------ÏÔʾµ±Ç°µÇ½Óû§Ãû
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create sequence ÐòÁÐÃû start with 1 increment by 2 minvalue 1 maxvalue 2000
cycle/uncycle; -----±íʾ¸ÃÐòÁдÓ1¿ªÊ¼£¬×ÔÔö2£¬×îСֵ1£¬×î´óÖµ2000£¬cycle±íʾµ½´ï×î´óÖµºó
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select * from v$version;
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select sum(bytes)/(1024*1024) as free_space,tablespace_name
from dba_free_space
group by tablespace_ ......
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S:select abs(-1) value
O:select abs(-1) value from dual
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S:select ceiling(-1.001) value
O:select ceil(-1.001) value from dual
3.È¡Õû£¨Ð¡£©
S:select floor(-1.001) value
O:select floor(-1.001) value from dual
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S:select cast(-1.002 as int) value
O:selec ......
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CREATE OR REPLACE PROCEDURE ´æ´¢¹ý³ÌÃû×Ö
(
²ÎÊý1 IN NUMBER,
²ÎÊý2 IN NUMBER
) IS
±äÁ¿1 INTEGER :=0;
±äÁ¿2 DATE;
BEGIN
END ´æ´¢¹ý³ÌÃû×Ö
2.SELECT INTO STATEMENT
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oracleÖеÄselectÓï¾ä¿ÉÒÔÓÃSTART WITH...CONNECT BY PRIOR×Ó¾äʵÏֵݹé²éѯ£¬connect by Êǽṹ»¯²éѯÖÐÓõ½µÄ£¬Æä»ù±¾Óï·¨ÊÇ£º
select ... from <TableName>
where <Conditional-1>
start with <Conditional-2>
connect by <Conditional-3>
;
<Conditi ......