Oracle 创建表空间
1.创建表空间
导出Oracle数据的指令:exp jds/jds@192.168.99.199/orcl file=C:\jds.dmp owner=jds 导入Oracle数据的指令:imp zcl/zcl@127.0.0.1:1521/orcl file=C:\jds.dmp full=y --第1步:创建临时表空间 CREATE TEMPORARY TABLESPACE User_Temp TEMPFILE 'E:\OrclData\DataTemp\User_Temp.dbf' SIZE 50m AUTOEXTEND ON NEXT 50m MAXSIZE 20480m EXTENT MANAGEMENT LOCAL; --第2步:创建表空间语句(创建表空间名称:User_Data;创建位置:E:\OrclData\DataSpace\User_Data.dbf 初始大小:50m;按50M大小自动增长,最大20480M) CREATE TABLESPACE User_Data DATAFILE 'E:\OrclData\DataSpace\User_Data.dbf'SIZE 50m AUTOEXTEND ON NEXT 50m MAXSIZE 20480m EXTENT MANAGEMENT LOCAL; --第3步:创建表空间内的用户(创建用户名和密码 用户名:zcl 密码:zcl;默认的表空间位置:User_Data) CREATE USER zcl IDENTIFIED BY zcl DEFAULT TABLESPACE User_Data TEMPORARY TABLESPACE User_Temp; --第4步:给用户授予权限(赋予用户zcl权限:连接权限,修改权限,最高权限) GRANT CONNECT,RESOURCE,DBA TO zcl;
2.创建用户、表空间并设置权限
---单个执行语句---
--dba账户登录 sqlplus 请输入用户名:SysDba as sysdba 请输入口令:123456 --创建账号 create user zcl identified by zcl; --创建临时表空间 create temporary tablespace DATA_TEMP tempfile 'D:\ORACLE\ORADATA\ORCL\DATA_TEMP.dbf' size 32m autoextend on next 32m maxsize 2048m extent management local; --将临时表空间分配给用户 alter user zcl temporary tablespace zcl; --创建表空间 create tablespace TECHRPT_DATA logging datafile 'D:\ORACLE\ORADATA\ORCL\TECHRPT_DATA.ora' size 50m autoextend on next 50m maxsize 2048m extent management local; --将表空间分配给用户 alter user zcl default tablespace zcl; --授权 grant dba to zcl; grant connect,resource to zcl;--提交 commit; --退出 quit; --删除用户 drop user zcl cascade; --删除表空间 drop tablespace TECHRPT_DATA including contents and datafiles; --修改密码 alter user system identified by system;
3.查询表空间信息
--1、查看表空间的名称及大小 SELECT t.tablespace_name, round(SUM(bytes / (1024 * 1024)), 0) ts_size FROM dba_tablespaces t, dba_data_files d WHERE t.tablespace_name = d.tablespace_name GROUP BY t.tablespace_name; --2、查看表空间物理文件的名称及大小 SELECT tablespace_name, file_id, file_name, round(bytes / (1024 * 1024), 0) total_space FROM dba_data_files ORDER BY tablespace_name; --3、查看回滚段名称及大小 SELECT segment_name, tablespace_name, r.status, (initial_extent / 1024) initialextent, (next_extent / 1024) nextextent, max_extents, v.curext curextent FROM dba_rollback_segs r, v$rollstat v WHERE r.segment_id = v.usn(+) ORDER BY segment_name; --4、查看控制文件 SELECT NAME FROM v$controlfile; --5、查看日志文件 SELECT MEMBER FROM v$logfile; --6、查看表空间的使用情况 SELECT SUM(bytes) / (1024 * 1024) AS free_space, tablespace_name FROM dba_free_space GROUP BY tablespace_name; SELECT a.tablespace_name, a.bytes total, b.bytes used, c.bytes free, (b.bytes * 100) / a.bytes "% USED ", (c.bytes * 100) / a.bytes "% FREE " FROM sys.sm$ts_avail a, sys.sm$ts_used b, sys.sm$ts_free c WHERE a.tablespace_name = b.tablespace_name AND a.tablespace_name = c.tablespace_name; --7、查看数据库库对象 SELECT owner, object_type, status, COUNT(*) count# FROM all_objects GROUP BY owner, object_type, status; --8、查看数据库的版本 SELECT version FROM product_component_version WHERE substr(product, 1, 6) = 'Oracle'; --9、查看数据库的创建日期和归档方式 SELECT created, log_mode, log_mode FROM v$database; --10、综合查询 --1G=1024MB --1M=1024KB --1K=1024Bytes --1M=11048576Bytes --1G=1024*11048576Bytes=11313741824Bytes SELECT a.tablespace_name "表空间名", total "表空间大小", free "表空间剩余大小", (total - free) "表空间使用大小", total / (1024 * 1024 * 1024) "表空间大小(G)", free / (1024 * 1024 * 1024) "表空间剩余大小(G)", (total - free) / (1024 * 1024 * 1024) "表空间使用大小(G)", round((total - free) / total, 4) * 100 "使用率 %" FROM (SELECT tablespace_name, SUM(bytes) free FROM dba_free_space GROUP BY tablespace_name) a, (SELECT tablespace_name, SUM(bytes) total FROM dba_data_files GROUP BY tablespace_name) b WHERE a.tablespace_name = b.tablespace_name
4.查询用户所属表空间
select username,default_tablespace from dba_users where username='ZCL';