oracle快速上手筆記

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oracle比較好的：吉林大學遠程教育學院計算機分院；oracle9i ocp教程

ORACLE的用戶：  SYS（系統的最高權限）  SYSTEM
如果有實例則有HR用戶

SQL登陸方式:SQL>conn sys/admin@test as sysdba

啓動：startup pfile=[P文件]
關閉：shutdown immediate|force|normal|tanscational

啓動和關閉時，必須用SYS AS SYSDBA才能執行

創建用戶：
CREATE USER USERNAME IDENTIFIED BY ABCD
GRANT CONNECT,RESOURCER TO USERNAME

刪除用戶 drop user username

鎖定用戶 alter user username account unlock

解鎖用戶 alter user username account unlock

顯示用戶的所有表：select table_name from user_tables

顯示錶結構desc user_tables

縮小行距 col

開發人員最常用的授權命令grant connect,resource to username

delete要記日誌
trancate 不要記日誌，速度較快

序列：ORACLE的特色

create sequence sq_account increment by 1 start with 100

create table mytb(id int not null primary key,name char(22))
insert into mytb values(sq_account.nextval,'hello')

select sq_account.currentval,sq_account.nextval from dual

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