1、查看表空间文件占用比例
select b.file_id
as 文件ID,
b.tablespace_name
as 表空间,
b.file_name
as 物理文件名,
b.bytes/1024/1024/1024
as 总字节数,
(b.bytes-sum(nvl(a.bytes,0)))/1024/1024/1024
as 已使用,
sum(nvl(a.bytes,0))/1024/1024/1024
as 剩余,
sum(nvl(a.bytes,0))/(b.bytes)*100
as 剩余百分比
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.file_id,b.bytes
order by b.tablespace_name ;
2、一键查询有表分区的表
SELECT TABLE_NAME,PARTITION_NAME,TABLESPACE_NAME
FROM USER_TAB_PARTITIONS;
3、查询oracle当前被锁对象
select a.session_id, c.serial#, a.locked_mode, a.oracle_username, a.os_user_name, c.machine,
c.terminal, b.object_name, c.logon_time
from v$locked_object a, all_objects b, v$session c
where a.object_id = b.object_id and a.session_id = c.sid
order by c.sid, c.serial#;
根据查出来的数据KILL掉
alter system kill session '24,111';
-4.察看TAXI用户的TAXIIDXTBS表空间有什么数据段
select * from DBA_SEGMENTS where owner = 'TAXI' and tablespace_name = 'TAXIIDXTBS' order by header_block desc;
--5.收缩数据文件
select a.file#,a.name,a.bytes/1024/1024 CurrentMB,
ceil(HWM * a.block_size)/1024/1024 ResizeTo,
(a.bytes - HWM * a.block_size)/1024/1024 ReleaseMB,
'alter database datafile '''||a.name||''' resize '||
ceil(HWM * a.block_size/1024/1024) || 'M;' ResizeCMD
from v$datafile a,
(select file_id,max(block_id+blocks-1) HWM
from dba_extents
group by file_id) b
where a.file# = b.file_id(+)
and (a.bytes - HWM *block_size)>0
order by 5
--6.增加表空间
ALTER TABLESPACE "SMCXKH" ADD DATAFILE 'F:APPADMINISTRATORORADATAORCL estdbf1' SIZE 100M AUTOEXTEND ON NEXT 100M MAXSIZE UNLIMITED
给SMCXKH表空间,增加testdbf1的数据文件,初始100M,每次增长100M,最大长到32G
--7更改数据库密码
-免密登入数据库:sqlplus "/as sysdba"
更改密码:alter user sys identified by oracle;
关闭/重启数据库
shutdown immediate; --关闭数据库
startup; --重启数据库
--8查询当前用户使用的表空间
select default_tablespace from dba_users where username='登录用户';
--9数据库块对应的表查询
SELECT A.TABLE_NAME,
A.COLUMN_NAME,
B.SEGMENT_NAME,
B.SEGMENT_TYPE,
B.TABLESPACE_NAME,
B.BYTES / 1024 / 1024,
B.BLOCKS,
B.EXTENTS
FROM USER_LOBS A, USER_SEGMENTS B
WHERE A.SEGMENT_NAME = B.SEGMENT_NAME
ORDER BY B.BYTES DESC;
--10表按时间来查询统计数字
select count(*) from TORN t where t.TXN_TIME> to_date('2019-06-17','yyyy-mm-dd')
and t.TXN_TIME<to_date('2019-06-19','yyyy-mm-dd');
--11查看用户及表空间占用大小
select se.segment_name,se.segment_type,se.tablespace_name,se.header_block, se.BYTES
from DBA_SEGMENTS se where owner = 'TAXI'
and tablespace_name = 'TAXITBS'
order by BYTES desc;
--12、开启密码复杂度验证函数
sqlplus / as sysdba
@?/rdbms/admin/utlpwdmg.sql
你要先去配置utlpwdmg.sql文件
---13-查看当前有哪些用户正在使用数据
SELECT osuser, a.username,cpu_time/executions/1000000||'s',b.sql_text,machine
from v$session a, v$sqlarea b
where a.sql_address =b.address order by cpu_time/executions desc;
---14-是把B表的所有数据,插入到A表
---15- 复制表结构及其数据:
create table table_name_new as select * from table_name_old
---16- 只复制表结构:
create table table_name_new as select * from table_name_old where 1=2;
或者:
create table table_name_new like table_name_old
---17- 按时间查询筛选:
select count(*) from CARD t where t.TXN_TIME> to_date('2019-06-17','yyyy-mm-dd')
and t.TXN_TIME<to_date('2019-06-19','yyyy-mm-dd');
---18---一键查询有表分区的表
SELECT TABLE_NAME,PARTITION_NAME,TABLESPACE_NAME
FROM USER_TAB_PARTITIONS;