官方网址

https://docs.oracle.com/database/121/REFRN/toc.htm

查询数据库逻辑大小

select sum(bytes/1024/1024/1024) GB from DBA_SEGMENTS;

查询数据库物理大小

select sum(bytes/1024/1024/1024) GB from DBA_data_files;

查询数据库用户的逻辑大小

select OWNER,sum(BYTES/1024/1024/1024) GB from dba_segments where OWNER='YWGGFW' group by OWNER;

dg排错

select * from v$dataguard_status

select dest_name,status,error from v$archive_dest where dest_id=2;

查询表个数

select count(*) from dba_tables  where owner='YGYW_USERCS';

查看资源限制

select * from v$resource_limit;

查询对象数是否一致（排除回收站对象）

select owner,object_type,count(*) from dba_objects

where object_name not like 'BIN$%'

and owner in ('DZDZ_TEMP','XTGL','DZDZ_CKTS','DZDZ_SJCS','DZDZ_YDPT','DZDZ_SJCJ','FPCY','GGS','ZKCX', 'DZDZ','DZDZ_LSSJ')

group by owner,object_type

order by 1,2;

查看数据库是readonly还是readwrite

select OPEN_MODE from v$database;

查看控制文件scn

select CHECKPOINT_CHANGE# from v$datafile;

查看数据文件scn

select CHECKPOINT_CHANGE#,FUZZY from v$datafile_header;

比对对象个数

SELECT D.OWNER,COUNT(1)

FROM dba_objects d

WHERE d.OWNER   in ('YWWWW')

AND NOT EXISTS (SELECT 1 FROM DBA_RECYCLEBIN B WHERE B.object_name=D.OBJECT_NAME AND D.OWNER=B.owner)

GROUP BY D.OWNER

ORDER BY D.OWNER;

查询对象大小

select bytes/1024/1024/1024 from dba_segments where segment_name='PRICE' and owner='ZQ' and segment_type='TABLE';

查询会话

SELECT SID, SERIAL#, PADDR FROM V$SESSION

WHERE USERNAME = USER;

查看会话占用cpu高的

SELECT s.sid, s.serial#, p.spid ,s.status as "OS PID",s.username, s.module, st.value/100 as "CPU sec"

FROM v$sesstat st, v$statname sn, v$session s, v$process p

WHERE sn.name = 'CPU used by this session' -- CPU

AND st.statistic# = sn.statistic#

AND st.sid = s.sid

AND s.paddr = p.addr

AND s.last_call_et < 1800 -- active within last 1/2 hour

AND s.logon_time > (SYSDATE - 240/1440) -- sessions logged on within 4 hours

ORDER BY st.value;

查询分区表

DBA_TAB_PARTITIONS

查询索引分区

dba_ind_partitions

查看数据库启动状态

select status from v$instance;

查看所有用户名

select * from all_users;

select username from DBA_USERS order by created;

查询directory

select * from dba_directories;

查询过去发生的事件（锁）

select  instance_number,session_id,sql_id,machine,event,BLOCKING_INST_ID,blocking_session,to_char(sample_time,'yyyy-MM-dd HH24:mi:ss') from DBA_HIST_ACTIVE_SESS_HISTORY where sample_time>to_date('2019-11-22 17:00:00','yyyy-MM-dd HH24:mi:ss') and sample_time<to_date('2019-11-22 18:00:00','yyyy-MM-dd HH24:mi:ss') and wait_class<>'Idle' and event='enq: TX - row lock contention';

查询归档量

SELECT SUM(BLOCKS *BLOCK_SIZE )/1024/1024/1024 AS "Size(G)",TRUNC(completion_time)  FROM v$archived_log GROUP BY TRUNC(completion_time) order by TRUNC(completion_time);

查找dump

select event,count(*) from gv$session_wait where wait_class<>'Idle' group by event;

查询视图创建DDL语句

select DBMS_METADATA.GET_DDL('MATERIALIZED_VIEW/VIEW/TABLE','TABLENAME','USER')  from dual;

查看用户a

select * from dba_sys_privs where grantee='USERNAME';

查看表执行计划

select * from table(dbms_xplan.display_awr('823mnkcytq2mm'));

查看当前的执行计划（last execution)

SELECT RPAD('Inst: ' || v.inst_id, 9) || ' ' ||

RPAD('Child: ' || v.child_number, 11) inst_child,

t.plan_table_output

FROM gv$sql v,

TABLE(DBMS_XPLAN.DISPLAY('gv$sql_plan_statistics_all',

NULL,

'ADVANCED ALLSTATS LAST -Projection -Outline -Note',

'inst_id = ' || v.inst_id ||

' AND sql_id = ''' || v.sql_id ||

''' AND child_number = ' || v.child_number)) t

WHERE v.sql_id = '854szqxypxu4r'

AND v.loaded_versions > 0;

查看当前的执行计划（all execution)

SELECT RPAD('Inst: ' || v.inst_id, 9) || ' ' ||

RPAD('Child: ' || v.child_number, 11) inst_child,

t.plan_table_output

FROM gv$sql v,

TABLE(DBMS_XPLAN.DISPLAY('gv$sql_plan_statistics_all',

NULL,

'ADVANCED ALLSTATS -Projection -Outline -Note',

'inst_id = ' || v.inst_id ||

' AND sql_id = ''' || v.sql_id ||

''' AND child_number = ' || v.child_number)) t

WHERE v.sql_id = '854szqxypxu4r'

AND v.loaded_versions > 0

AND v.executions > 1;

查看历史的执行计划

SELECT t.plan_table_output

FROM (SELECT DISTINCT sql_id, plan_hash_value, dbid

FROM dba_hist_sql_plan

WHERE sql_id = 'f5yun5dynkskv') v,

TABLE(DBMS_XPLAN.DISPLAY_AWR(v.sql_id,

v.plan_hash_value,

null,

'ADVANCED ALLSTATS')) t;

查看失败登陆用户信息

select userid, userhost, terminal, clientid from aud$ where returncode=1017;

查询数据库化身号

select * from v$database_Incarnation;

查询生产用户

alter session set nls_date_format='yyyy-mm-dd hh24:mi:ss';

set line 200

SELECT d.username,

d.default_tablespace,

d.temporary_tablespace,

d.account_status,

d.created

from dba_users d

where d.account_status = 'OPEN' and d.username not like '%SYS%'

order by d.CREATED desc;

查询各个用户表个数

SELECT D.OWNER,COUNT(1)

FROM dba_objects d

WHERE d.OWNER   in ('GSCW2019','CETRCWCM','ZJSJWLJG','JSEARCH','JCMS','GWJH','HZMCCLIENT','HZMCMEMAUDIT','HZMCASSET','HZCX','ARCHIVE','MCCH','SPOTLIGHT','TYYHTMP','GSCW','DRB','SZZS_QUERY','WLJG','MBKHNEW','ADMIN' ,'FUND','YGGS','TRSWCM_PLUGINS','BASE','RS330000','TRSWCM52','EXOA','ORT','CENTERSPEEDWAY')

and d.OWNER not in ('PUBLIC')

AND NOT EXISTS (SELECT 1 FROM DBA_RECYCLEBIN B WHERE B.object_name=D.OBJECT_NAME AND D.OWNER=B.owner)

GROUP BY D.OWNER

ORDER BY D.OWNER;

查看用户对应的所有表和对应表空间

select table_name,tablespace_name from all_tables where owner='YWGGFW';

查询数据文件

set linesize 6000

col name format a60;

select file#,name,bytes from v$datafile;

col file_name format a60;

select file_name,tablespace_name,bytes from DBA_DATA_FILES;

查看dg启用模式

select DATABASE_ROLE,PROTECTION_MODE,PROTECTION_LEVEL from v$database;

查询控制文件

select * from v$controlfile;

查看最新应用时间

select max(to_char(first_time,&apos;yyyymmdd hh24:mi:ss&apos;)) from v$archived_log where applied=&apos;YES&apos; and dest_id=2;

查看数据文件当前大小和最大可扩

SELECT R1.*,R2.MAX_SIZE_GB FROM

(SELECT  /*+ ORDERED */

A.TABLESPACE_NAME TABLESPACE_NAME,

ROUND(A.BYTES / 1024 / 1024 / 1024, 2) CURRENT_SIZE_GB,

ROUND((A.BYTES - B.BYTES) / 1024 / 1024 / 1024, 2) USED_SIZE_GB,

ROUND(B.BYTES / 1024 / 1024 / 1024, 2) FREE_SIZE_GB,

ROUND(((A.BYTES - B.BYTES) / A.BYTES) * 100, 2) PERCENT_USED_RATE

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.TABLESPACE_NAME) R1,

(SELECT /*+ ORDERED */

D.TABLESPACE_NAME TABLESPACE_NAME,

ROUND(SUM(D.BYTES) / 1024 / 1024 / 1024, 2) CURRENT_SIZE_GB,

ROUND(SUM(D.MAXBYTES) / 1024 / 1024 / 1024, 2) MAX_SIZE_GB

FROM SYS.DBA_DATA_FILES D,

V$DATAFILE V,

(SELECT VALUE FROM V$PARAMETER WHERE NAME = 'db_block_size') E

WHERE (D.FILE_NAME = V.NAME)

GROUP BY D.TABLESPACE_NAME) R2

WHERE R1.TABLESPACE_NAME = R2.TABLESPACE_NAME;

查询参数文件

Show parameter pfile;

查看日志文件

select * from v$logfile;

查找globlename

select * from global_name;

查看视图

Select owner,view_name from DBA_VIEWS;

查看索引

select owner,index_name,table_name from dba_indexes where owner=' ';

查看是否开启闪回

select  log_mode,open_mode,flashback_on from v$database;

查询表所在的块

select rowid,dbms_rowid.rowid_relative_fno(rowid) rel_fno,dbms_rowid.rowid_block_number(rowid) blockno,dbms_rowid.rowid_row_number(rowid) rowno from jiujian;

查看表删除记录

select * from user_recyclebin;

判断是否陈旧

select owner, table_name, object_type, stale_stats, num_rows, last_analyzed

from dba_tab_statistics s

where owner = 'SCOTT'

and (owner, table_name) in

(select object_owner, object_name

from v$sql_plan

where sql_id = '8276t1g7j3ksh'

and object_type like '%TABLE%'

union

select table_owner, table_name

from dba_indexes

where owner = 'SCOTT'

and (owner, index_name) in

(select object_owner, object_name

from v$sql_plan

where sql_id = '8276t1g7j3ksh'

and object_type like '%INDEX%'));

查看sga组件

select * from v$sgainfo;

查询数据库组件

set linesize 300

col comp_name for a40

col comp_id for a10

select comp_id,comp_name,version,status from dba_registry;

查看数据库补丁版本

set linesize 500

col version for a10

col bundle_series for a8

col comments for a20

select   version, bundle_series, comments from dba_registry_history;

set linesize 100

col product for a40

col version for a15

col status for a20

select * from product_component_version;

查看每日归档量

select to_char(completion_time,'yyyy-mm-dd') as date1,count(0) as cnt,round(sum((blocks *block_size)/1024/1024)) as mb from v$archived_log group by to_char(completion_time,'yyyy-mm-dd') order by date1 desc;

查询每小时归档量

alter session set nls_date_format='yyyy-mm-dd hh24:mi:ss';

select logtime,

count(*),

round(sum(blocks * block_size) / 1024 / 1024/1024) mbsize

from (select trunc(first_time, 'hh') as logtime, a.BLOCKS, a.BLOCK_SIZE

from v$archived_log a

where a.DEST_ID = 1

and a.FIRST_TIME > trunc(sysdate-1))

group by logtime

order by logtime desc;

查看数据块损坏

select tablespace_name,segment_type,owner,segment_name from dba_extents where file_id=38 and 295529 between block_id AND block_id + blocks - 1;

查看表空间

select * from v$tablespace

SELECT UPPER(F.TABLESPACE_NAME) ,

D.TOT_GROOTTE_MB ,

D.TOT_GROOTTE_MB - F.TOTAL_BYTES ,

TO_CHAR(ROUND((D.TOT_GROOTTE_MB - F.TOTAL_BYTES) / D.TOT_GROOTTE_MB * 100,2),'990.99') ,

F.TOTAL_BYTES ,

F.MAX_BYTES

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;

查看表空间是否自增长

select file_name,autoextensible,increment_by from dba_data_files;

查看表最后统计信息时间

select LAST_ANALYZED from dba_tables where table_name='ZY_DETAIL_CHARGE';

收集表的统计信息

BEGIN

DBMS_STATS.GATHER_TABLE_STATS(ownname          => 'SCOTT',

tabname          => 'JASON’,

estimate_percent => 100,

method_opt       => 'for all columns size 1',

no_invalidate    => FALSE,

cascade          => TRUE);

END;

/

收集索引统计信息

BEGIN

SYS.DBMS_STATS.GATHER_INDEX_STATS (OwnName => 'ABC',

IndName => 'IDX_FUNC_ABC',

Estimate_Percent => 10,

Degree => SYS.DBMS_STATS.DEFAULT_DEGREE,

No_Invalidate => FALSE);

END;

/

强制走索引

SELECT /*+index(t pk_emp)*/* FROM EMP T

--强制索引，/*.....*/第一个星星后不能有空格，里边内容结构为：加号index(表名 空格 索引名)。

--如果表用了别名，注释里的表也要使用别名

从内存中生成spfile

create spfile from memory;

Explain for查看执行计划方法

select * from table(dbms_xplan.display('plan_table'));

Explain plan for

sql语句

查询创建用户的语句

select dbms_metadata.get_ddl('USER',ORIG.username) from dba_users ORIG;

select 'grant '||PRIVILEGE||' to '||GRANTEE||

decode(ADMIN_OPTION,'NO',';','YES',' with admin option;')

"Grant dba_sys_privs DDL"

from dba_sys_privs where grantee=&UserName;

查看dg进程

select process,status from gv$managed_standby;

查看密码文件

select * from v$pwfile_users;

查询job运行日志

select owner,job_name,status,actual_start_date from dba_scheduler_job_run_details where job_name='JOB_NAME' order by log_date desc;

查看用户关联哪几个表空间：

select tablespace_name, sum(bytes) / (1024*1024*1024) size_G

from dba_segments

where owner = 'YLR'

group by tablespace_name;

rman恢复进度

select inst_id,sid,serial# opname,round (sofar/totalwork *100,2) from gv$session_longops where opname not like '%aggregate%' and totalwork !=0 and sofar <> totalwork;

查询scn是否一致（DG切换）

select FILE#,CHECKPOINT_CHANGE#,FUZZY from v$datafile_header;

1、在以上图中使用系统进程PID查询对应的物理地址

SELECT v.addr,v.* FROM v$process v

WHERE v.SPID = '5256';

2、通过该物理地址查找对应的SQL_ID

SELECT t.SQL_ID,t.* FROM v$session t

WHERE t.paddr= '000000025C5EB9F8';

3、通过SQL_ID来查找对应的SQL语句

SELECT sql_text FROM v$sql

WHERE sql_id = 'dqu970xzs3gpv';

###最近1分钟cpu消耗最高的sql

SELECT ASH.INST_ID,

ASH.SQL_ID,

(SELECT VS.SQL_TEXT

FROM GV$SQLAREA VS

WHERE VS.SQL_ID = ASH.SQL_ID

AND ASH.INST_ID = VS.INST_ID) SQL_TEXT,

ASH.SQL_CHILD_NUMBER,

ASH.SQL_OPNAME,

ASH.SESSION_INFO,

COUNTS,

PCTLOAD * 100 || '%' PCTLOAD

FROM (SELECT ASH.INST_ID,

ASH.SQL_ID,

ASH.SQL_CHILD_NUMBER,

ASH.SQL_OPNAME,

(ASH.MODULE || '--' || ASH.ACTION || '--' || ASH.PROGRAM || '--' ||

ASH.MACHINE || '--' || ASH.CLIENT_ID || '--' ||

ASH.SESSION_TYPE) SESSION_INFO,

COUNT(*) COUNTS,

ROUND(COUNT(*) / SUM(COUNT(*)) OVER(), 2) PCTLOAD,

DENSE_RANK() OVER(ORDER BY COUNT(*) DESC) RANK_ORDER

FROM GV$ACTIVE_SESSION_HISTORY ASH

WHERE  ASH.SESSION_TYPE <> 'BACKGROUND'

AND ASH.SESSION_STATE = 'ON CPU'

AND SAMPLE_TIME > SYSDATE - 1 / (24 * 60)

GROUP BY ASH.INST_ID,

ASH.SQL_ID,

ASH.SQL_CHILD_NUMBER,

ASH.SQL_OPNAME,

(ASH.MODULE || '--' || ASH.ACTION || '--' || ASH.PROGRAM || '--' ||

ASH.MACHINE || '--' || ASH.CLIENT_ID || '--' ||

ASH.SESSION_TYPE)) ASH

WHERE RANK_ORDER <= 10

ORDER BY COUNTS DESC;

SELECT ASH.INST_ID,

ASH.SQL_ID,

(SELECT VS.SQL_TEXT

FROM GV$SQLAREA VS

WHERE VS.SQL_ID = ASH.SQL_ID

AND ASH.INST_ID = VS.INST_ID) SQL_TEXT,

ASH.SQL_CHILD_NUMBER,

ASH.SESSION_INFO,

COUNTS,

PCTLOAD * 100 || '%' PCTLOAD

FROM (SELECT ASH.INST_ID,

ASH.SQL_ID,

ASH.SQL_CHILD_NUMBER,

(ASH.MODULE || '--' || ASH.ACTION || '--' || ASH.PROGRAM || '--' || '--' || ASH.CLIENT_ID || '--' ||

ASH.SESSION_TYPE) SESSION_INFO,

COUNT(*) COUNTS,

ROUND(COUNT(*) / SUM(COUNT(*)) OVER(), 2) PCTLOAD,

DENSE_RANK() OVER(ORDER BY COUNT(*) DESC) RANK_ORDER

FROM GV$ACTIVE_SESSION_HISTORY ASH

WHERE  ASH.SESSION_TYPE <> 'BACKGROUND'

AND ASH.SESSION_STATE = 'ON CPU'

AND SAMPLE_TIME > SYSDATE - 1 / (24 * 60)

GROUP BY ASH.INST_ID,

ASH.SQL_ID,

ASH.SQL_CHILD_NUMBER,

(ASH.MODULE || '--' || ASH.ACTION || '--' || ASH.PROGRAM || '--' || '--' || ASH.CLIENT_ID || '--' ||

ASH.SESSION_TYPE)) ASH

WHERE RANK_ORDER <= 10

ORDER BY COUNTS DESC;

一、查询执行最慢的sql

select *
 from (select sa.SQL_TEXT,
        sa.SQL_FULLTEXT,
        sa.EXECUTIONS "执行次数",
        round(sa.ELAPSED_TIME / 1000000, 2) "总执行时间",
        round(sa.ELAPSED_TIME / 1000000 / sa.EXECUTIONS, 2) "平均执行时间",
        sa.COMMAND_TYPE,
        sa.PARSING_USER_ID "用户ID",
        u.username "用户名",
        sa.HASH_VALUE
     from v$sqlarea sa
     left join all_users u
      on sa.PARSING_USER_ID = u.user_id
     where sa.EXECUTIONS > 0
     order by (sa.ELAPSED_TIME / sa.EXECUTIONS) desc)
 where rownum <= 50;
 
 
二、查询次数最多的 sql

select *
 from (select s.SQL_TEXT,
        s.EXECUTIONS "执行次数",
        s.PARSING_USER_ID "用户名",
        rank() over(order by EXECUTIONS desc) EXEC_RANK
     from v$sql s
     left join all_users u
      on u.USER_ID = s.PARSING_USER_ID) t
 where exec_rank <= 100;

查看steamspool实际大小

select x.ksppinm name,y.ksppstvl value,x.ksppdesc describ      from sys.x$ksppi x,sys.x$ksppcv y      where x.inst_id=userenv('Instance')      and y.inst_id=userenv('Instance')      and x.indx=y.indx      and x.ksppinm like '%streams_pool%'；