文章目錄

• 1 概述
• 2 語法
• • 2.1 創建
  • 2.2 查詢
  • 2.3 刪除
• 3 擴展
• • 3.1 表空間

1 概述

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.edge-pattern-dashed{stroke-dasharray:3}#mermaid-svg-7byksWpGx8GrQnsX .edge-pattern-dotted{stroke-dasharray:2}#mermaid-svg-7byksWpGx8GrQnsX .marker{fill:#333}#mermaid-svg-7byksWpGx8GrQnsX .marker.cross{stroke:#333}:root { --mermaid-font-family: "trebuchet ms", verdana, arial;}#mermaid-svg-7byksWpGx8GrQnsX {color: rgba(0, 0, 0, 0.75);font: ;}創建用戶create user 用戶名 identified by 密碼;DBA 用戶執行默認表空間：users建議指定 表空間默認臨時表空間：temp

2 語法

2.1 創建

-- DBA 用戶執行，默認 users 表空間（不推薦） create user <username> identified by <password>;-- 實際開發中 create user <username> identified by <password> default tablespace <tablespace_name> -- 默認表空間 temporary tablespace temp -- 臨時表空間 quota unlimited on <tablespace_name> -- 表空間額度grant create session to <username>; -- 授權（可以登錄）

示例：創建用戶 zhangsan 密碼 12345，表空間 TESTTBS

create user zhangsan identified by 12345 default tablespace TESTTBS temporary tablespace temp quota unlimited on TESTTBS;grant create session TO zhangsan;

登錄成功：

2.2 查詢

select * from dba_users t where t.username = 'ZHANGSAN';

查詢截圖：

2.3 刪除

-- zhangsan 必須已斷開連接 drop user zhangsan cascade;

3 擴展

3.1 表空間

-- 創建 create tablespace TESTTBS -- 區分大小寫 datafile 'E:\TableSpace\TESTTBS01.dbf' size 10m;-- 查詢表空間 select * from dba_tablespaces t where t.tablespace_name = 'TESTTBS';-- 查詢數據文件 select * from dba_data_files t where t.tablespace_name = 'TESTTBS';

擴展：Oracle 表空間詳解（tablespace）

總結

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