Oracle数据库常用的sql语句记录

设置Oracle用户密码政策

-->查询用户关联的密码政策
select username,profile from dba_users t where t.username='LIFERAY72';
-->查询密码过期时间
Select * FROM dba_profiles s Where s.profile='DEFAULT' AND resource_name='PASSWORD_LIFE_TIME';
-->修改密码过期时间为90天
Alter PROFILE DEFAULT LIMIT PASSWORD_LIFE_TIME '90';
-->修改密码过期时间为永久期限
Alter PROFILE DEFAULT LIMIT PASSWORD_LIFE_TIME UNLIMITED;    

Oracle表空间相关查询语句

-->查询所有表空间
select tablespace_name from dba_tablespaces;
select tablespace_name from user_tablespaces;

-->查询使用过的表空间
select distinct tablespace_name from dba_all_tables;
select distinct tablespace_name from user_all_tables;

-->查询表空间中所有表的名称
select * from dba_all_tables where tablespace_name = '表空间' and owner='用户名';

-->查询表空间使用情况
select upper(f.tablespace_name) "表空间名",d.tot_grootte_mb "表空间大小(m)",d.tot_grootte_mb - f.total_bytes "已使用空间(m)",to_char(round((d.tot_grootte_mb - f.total_bytes) / d.tot_grootte_mb * 100,2),'990.99') || '%' "使用比",f.total_bytes "空闲空间(m)",f.max_bytes "最大块(m)"
from (select tablespace_name,round(sum(bytes) / (1024 * 1024), 2) total_bytes,round(max(bytes) / (1024 * 1024), 2) max_bytes from sys.dba_free_space group by tablespace_name) f,
(select dd.tablespace_name,round(sum(dd.bytes) / (1024 * 1024), 2) tot_grootte_mb from sys.dba_data_files dd group by dd.tablespace_name) d
where d.tablespace_name = f.tablespace_name
order by 4 desc, 5 asc;

-->查询表空间的free space
select tablespace_name,count(*) as extends,round(sum(bytes) / 1024 / 1024, 2) as mb,sum(blocks) as blocks
from dba_free_space
group by tablespace_name
order by 3 asc;

-->查询表空间的总容量
select tablespace_name, sum(bytes) / 1024 / 1024 as mb
from dba_data_files
group by tablespace_name
order by 2 desc;

-->查询表空间使用率、表空间使用情况
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",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;

select a.tablespace_name as "表空间名",a.bytes / 1024 / 1024 as "表空间大小(m)",(a.bytes - b.bytes) / 1024 / 1024 as "已使用空间(m)",b.bytes / 1024 / 1024 "空闲空间(m)",round(((a.bytes - b.bytes) / a.bytes) * 100, 2) "使用比"
from (select tablespace_name, sum(bytes) bytes from dba_data_files
group by tablespace_name) a,(select tablespace_name, sum(bytes) bytes, max(bytes) largest from dba_free_space
group by tablespace_name) b
where a.tablespace_name = b.tablespace_name
order by ((a.bytes - b.bytes) / a.bytes) desc;

select a.a1 表空间名称,c.c2 类型,c.c3 区管理,b.b2 / 1024 / 1024 表空间大小m,(b.b2 - a.a2) / 1024 / 1024 已使用m,substr((b.b2 - a.a2) / b.b2 * 100, 1, 5) 利用率
from (select tablespace_name a1, sum(nvl(bytes, 0)) a2 from dba_free_space
group by tablespace_name) a,(select tablespace_name b1, sum(bytes) b2 from dba_data_files
group by tablespace_name) b,(select tablespace_name c1, contents c2, extent_management c3 from dba_tablespaces) c
where a.a1 = b.b1 and c.c1 = b.b1;

-->查看表空间的名字及文件所在位置,带获取数据文件及路径
select b.file_name 物理文件名,b.tablespace_name 表空间名称,b.bytes / 1024 / 1024 总大小m,(b.bytes - sum(nvl(a.bytes, 0))) / 1024 / 1024 已使用m,substr((b.bytes - sum(nvl(a.bytes, 0))) / (b.bytes) * 100, 1, 5) 使用率
from dba_free_space a, dba_data_files b
where a.file_id = b.file_id
group by b.tablespace_name, b.file_name, b.bytes
order by b.tablespace_name;

Oracle 用户相关查询语句

-->查看所有用户：
select * from dba_users;select * from all_users;select * from user_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; (查看当前用户所拥有的权限)

-->查看角色(只能查看登陆用户拥有的角色)所包含的权限
sql>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

-->SqlPlus中查看一个用户所拥有权限,比如:SQL>select * from dba_sys_privs where grantee='TOM';
SQL>select * from dba_sys_privs where grantee='username'; --其中的username即用户名要大写才行。

-->Oracle删除指定用户所有表的方法
select 'Drop table '||table_name||';' from all_tables where owner='要删除的用户名(注意要大写)';

-->删除用户,如：drop user SMCHANNEL CASCADE
drop user user_name cascade;

-->获取当前用户下所有的表：
select table_name from user_tables;

-->删除某用户下所有的表数据:
select 'truncate table ' || table_name from user_tables;

-->禁止外键 ORACLE数据库中的外键约束名都在表user_constraints中可以查到。其中constraint_type='R'表示是外键约束。
alter table table_name enable constraint constraint_name;--启用外键约束的命令为
alter table table_name disable constraint constraint_name;--禁用外键约束的命令为
--然后再用SQL查出数据库中所以外键的约束名：
select 'alter table '||table_name||' enable constraint '||constraint_name||';' from user_constraints where constraint_type='R';
select 'alter table '||table_name||' disable constraint '||constraint_name||';' from user_constraints;

转载至：
https://www.cnblogs.com/ritchy/p/10917393.html