常用SQL(三)
select * from DBA_DATAPUMP_JOBS;select job_name,state from dba_datapump_jobs;
select * from DBA_DATAPUMP_SESSIONS;
-- 查看当前连接到数据库的用户
select distinct username from v$session where username is not null group by username;
-- 查看当前数据库版本
select * from v$version
-- 查看所有表
select * from user_tables
select serial#, sid from v$session;
-- 显示用户信息(所属表空间)
select distinct default_tablespace,temporary_tablespace from dba_users
-- 查询oracle的连接数
select count(*) from v$session;
-- 查询oracle的并发连接数
select count(*) from v$session where status='ACTIVE';
-- 查看不同用户的连接数
select username,count(username) from v$session where username is not null
group by username;
-- 查看所有用户：
select * from all_users;
-- 查看用户或角色系统权限(直接赋值给用户或角色的系统权限)：
select * from dba_sys_privs;
select * from user_sys_privs;
-- 查看角色(只能查看登陆用户拥有的角色)所包含的权限
select * from role_sys_privs;
-- 查看用户对象权限：
select * from dba_tab_privs;
select * from all_tab_privs;
select * from user_tab_privs;
-- 查看所有角色：
select * from dba_roles;
-- 查看用户或角色所拥有的角色：
select * from dba_role_privs;
select * from user_role_privs;
-- 查看哪些用户有sysdba或sysoper系统权限(查询时需要相应权限)
select * from V$PWFILE_USERS;
-- 查看表空间的名称及大小
SELECT t.tablespace_name, round(SUM(bytes / (1024 * 1024)), 0) ts_size
FROM dba_tablespaces t, dba_data_files d
WHERE t.tablespace_name = d.tablespace_name
GROUP BY t.tablespace_name;
-- 查看表空间物理文件的名称及大小
SELECT tablespace_name,
file_id,
file_name,
round(bytes / (1024 * 1024), 0) total_space
FROM dba_data_files
ORDER BY tablespace_name;
-- 查看回滚段名称及大小
SELECT segment_name,
tablespace_name,
r.status,
(initial_extent / 1024) initialextent,
(next_extent / 1024) nextextent,
max_extents,
v.curext curextent
FROM dba_rollback_segs r, v$rollstat v
WHERE r.segment_id = v.usn(+)
ORDER BY segment_name;
-- 查看控制文件
SELECT NAME FROM v$controlfile;
-- 查看日志文件
SELECT MEMBER FROM v$logfile;
-- 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$ts_free c
WHERE a.tablespace_name = b.tablespace_name
AND a.tablespace_name = c.tablespace_name;
-- 查看数据库库对象
SELECT owner, object_type, status, COUNT(*) count#
FROM all_objects
GROUP BY owner, object_type, status;
-- 查看数据库的版本
SELECT version
FROM product_component_version
WHERE substr(product, 1, 6) = 'Oracle';
-- 查看数据库的创建日期和归档方式
SELECT created, log_mode, log_mode FROM v$database;
页:
[1]