使用系統(tǒng)用戶登錄Oracle

系統(tǒng)用戶

sys, system sysman scott scott ? ??默認的密碼是 tiger

使用系統(tǒng)用戶登錄

使用 system用戶登錄 【username/password】 【@server】 【as sysdba|sysoper】 system/root? ??@orcl as sysdba orcl? ??就是自己設置的服務名 SQL> connect sys/toor as sysdba

查看登錄用戶

SQL>?show?user User?is?"SYSTEM" 查看登錄用戶 dba_users? ??數(shù)據(jù)字典? ??數(shù)據(jù)字典是數(shù)據(jù)庫提供的表，用于查看數(shù)據(jù)庫的信息。 SQL>?desc?dba_users SQL>?select?username?from?dba_users;

啟用scott用戶

啟用 scott用戶 SQL>?alter?user?scott?account?unlock; User?altered 修改用戶密碼 SQL> alter user scott identified by 123456;

表空間概述

表空間 表空間概述

• 理解表空間
• • 數(shù)據(jù)庫與表空間
  • 表空間與數(shù)據(jù)文件
• 表空間的分類
• • 永久表空間
  • 臨時表空間
  • UNDO表空間

查看用戶的表空間 創(chuàng)建、修改、刪除表空間

查看用戶表空間?

dba_tablespaces、 user_tablespaces數(shù)據(jù)字典

SQL>?desc?dba_tablespaces; SQL>?select?tablespace_name?from?dba_tablespaces; TABLESPACE_NAME ------------------------------ SYSTEM SYSAUX UNDOTBS1 TEMP USERS EXAMPLE 6?rows?selected TMP 索引信息 user 數(shù)據(jù)庫對象 ------------- SQL>?desc?user_tablespaces SQL>?select?tablespace_name?from?user_tablespaces; TABLESPACE_NAME ------------------------------ SYSTEM SYSAUX UNDOTBS1 TEMP USERS EXAMPLE 6?rows?selected SQL>? Connected?to?Oracle?Database?11g?Enterprise?Edition?Release?11.2.0.1.0? Connected?as?scott@WIN_ORCL SQL>?select?tablespace_name?from?dba_tablespaces; select?tablespace_name?from?dba_tablespaces ORA-00942:?table?or?view?does?not?exist SQL>?select?tablespace_name?from?user_tablespaces; TABLESPACE_NAME ------------------------------ SYSTEM SYSAUX UNDOTBS1 TEMP USERS EXAMPLE 6?rows?selected 權(quán)限不一樣,向下兼容

dba_users、user_users數(shù)據(jù)字典

權(quán)限大的可以查看權(quán)限小的 SQL>?desc?dba_users; SQL>?select?default_tablespace,temporary_tablespace?from?dba_users?where?username='SYSTEM'; DEFAULT_TABLESPACE?????????????TEMPORARY_TABLESPACE ------------------------------?------------------------------ SYSTEM?????????????????????????TEMP 每一個用戶下面的默認表空間和臨時表空間

設置用戶的默認或臨時表空間

ALTER USER username DEFAULT|TEMPORARY TABLESPACE tablespace_name SQL>?alter?user?system?default?tablespace?users; User?altered SQL>?select?default_tablespace,?temporary_tablespace?from?dba_users?where?username=?'SYSTEM'; DEFAULT_TABLESPACE?????????????TEMPORARY_TABLESPACE ------------------------------?------------------------------ USERS??????????????????????????TEMP SQL>?select?default_tablespace,?temporary_tablespace?from?dba_users?where?username=?'SYSTEM'; DEFAULT_TABLESPACE?????????????TEMPORARY_TABLESPACE ------------------------------?------------------------------ SYSTEM?????????????????????????TEMP

創(chuàng)建表空間

創(chuàng)建表空間 CREATE 【TEMPORARY】 TABLESPACE tablespace_name TEMPFILE|DATAFILE 'xx.dbf' SIZE XX SQL>?create?tablespace?test1_tablespacedatafile?'test1file.dbf'?size?10m; Tablespace?created SQL>?create?temporary?tablespace?temtest1_tablespace?tempfile?'tempfile1.dbf'?size?10m; Tablespace?created SQL>?desc?dba_data_files SQL>?select?file_name?from?dba_data_files?where?tablespace_name='TEST1_TABLESPACE';? ? ? ? ? ? # 注意要大寫，否則查不到 FILE_NAME -------------------------------------------------------------------------------- D:\APP\ORACLE\PRODUCT\11.2.0\DBHOME_1\DATABASE\TEST1FILE.DBF SQL>?select?file_name?from?dba_temp_files?where?tablespace_name='TEMTEST1_TABLESPACE'; FILE_NAME -------------------------------------------------------------------------------- D:\APP\ORACLE\PRODUCT\11.2.0\DBHOME_1\DATABASE\TEMPFILE1.DBF

修改表空間?

修改表空間

• 修改表空間的狀態(tài)

設置聯(lián)機或脫機狀態(tài)

ALTER TABLESPACE tablespace_name ONLINE | OFFLINE； SQL>?alter?tablespace?test1_tablespace?offline; Tablespace?altered SQL>?select?status?from?dba_tablespaces?where?tablespace_name?=?'TEST1_TABLESPACE'; STATUS --------- OFFLINE SQL>?alter?tablespace?test1_tablespace?online; Tablespace?altered SQL>?select?status?from?dba_tablespaces?where?tablespace_name?=?'TEST1_TABLESPACE'; STATUS --------- ONLINE

設置只讀或可讀寫狀態(tài)

ALTER TABLESPACE tablespace name READ ONLY | READ WRITE? ? ? ? ? ? ? ? ? ? ?#設置為READ ONLY 以后就不能進行聯(lián)機和脫機操作 SQL>?alter?tablespace?test1_tablespace?read?only; Tablespace?altered SQL>?select?status?from?dba_tablespaces?where?tablespace_name?=?'TEST1_TABLESPACE'; STATUS --------- READ?ONLY SQL>?alter?tablespace?test1_tablespace?read?write; Tablespace?altered SQL>?select?status?from?dba_tablespaces?where?tablespace_name?=?'TEST1_TABLESPACE'; STATUS --------- ONLINE

改數(shù)據(jù)文件?

增加數(shù)據(jù)文件

ALTER TABLESPACE tablespace_name ADD DATAFILE xx.dbf size xx SQL>?alter?tablespace?test1_tablespace?add?datafile?'test2_file.dbf'?size?10m; Tablespace?altered SQL>?select?file_name?frOm?dba_data_files?where?tablespace_name='TEST1_TABLESPACE'; FILE_NAME -------------------------------------------------------------------------------- D:\APP\ORACLE\PRODUCT\11.2.0\DBHOME_1\DATABASE\TEST1FILE.DBF D:\APP\ORACLE\PRODUCT\11.2.0\DBHOME_1\DATABASE\TEST2_FILE.DBF

刪除數(shù)據(jù)文件

ALTER TABLESPACE tablespace_name DROP DATAFILE 'filename.dbf 不能刪除第一個表空間文件，如果要就需要刪除整個表空間 SQL>?alter?tablespace?test1_tablespace?drop?datafile?'test2_file.dbf'; Tablespace?altered SQL>?select?file_name?frOm?dba_data_files?where?tablespace_name='TEST1_TABLESPACE'; FILE_NAME -------------------------------------------------------------------------------- D:\APP\ORACLE\PRODUCT\11.2.0\DBHOME_1\DATABASE\TEST1FILE.DBF 更改system用戶默認表空間的語句是 alter user system default tablespace xxx

刪除表空間

刪除表空間 DROP TABLESPACE tablespace_name 【INCLUDING CONTENTS】 SQL>?drop?tablespace?temtest1_tablespace?including?contents; Tablespace?dropped

總結(jié)

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