oracle常用經典SQL查詢(zt)

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1、檢視錶空間的名稱及大小

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、檢視錶空間物理檔案的名稱及大小

select tablespace_name, file_id, file_name,

round(bytes/(1024*1024),0) total_space

from dba_data_files

order by tablespace_name;

3、檢視回滾段名稱及大小

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、檢視控制檔案

select name from v$controlfile;

5、檢視日誌檔案

select member from v$logfile;

6、檢視錶空間的使用情況

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、檢視資料庫庫物件

select owner, object_type, status, count(*) count# from all_objects group by owner, object_type, status;

8、檢視資料庫的版本　

Select version FROM Product_component_version

Where SUBSTR(PRODUCT,1,6)='Oracle';

9、檢視資料庫的建立日期和歸檔方式

Select Created, Log_Mode, Log_Mode From V$Database;

10、捕捉執行很久的SQL

column username format a12

column opname format a16

column progress format a8

select username,sid,opname,

round(sofar*100 / totalwork,0) || '%' as progress,

time_remaining,sql_text

from v$session_longops , v$sql

where time_remaining <> 0

and sql_address = address

and sql_hash_value = hash_value

/

11。檢視資料表的引數資訊

SELECT partition_name, high_value, high_value_length, tablespace_name,

pct_free, pct_used, ini_trans, max_trans, initial_extent,

next_extent, min_extent, max_extent, pct_increase, FREELISTS,

freelist_groups, LOGGING, BUFFER_POOL, num_rows, blocks,

empty_blocks, avg_space, chain_cnt, avg_row_len, sample_size,

last_analyzed

FROM dba_tab_partitions

--WHERE table_name = :tname AND table_owner = :towner

ORDER BY partition_position

12.檢視還沒提交的事務

select * from v$locked_object;

select * from v$transaction;

13。查詢object為哪些程式所用

select

p.spid,

s.sid,

s.serial# serial_num,

s.username user_name,

a.type object_type,

s.osuser os_user_name,

a.owner,

a.object object_name,

decode(sign(48 - command),

1,

to_char(command), 'Action Code #' || to_char(command) ) action,

p.program oracle_process,

s.terminal terminal,

s.program program,

s.status session_status

from v$session s, v$access a, v$process p

where s.paddr = p.addr and

s.type = 'USER' and

a.sid = s.sid and

a.object='SUBSCRIBER_ATTR'

order by s.username, s.osuser

14。回滾段檢視

select rownum, sys.dba_rollback_segs.segment_name Name, v$rollstat.extents

Extents, v$rollstat.rssize Size_in_Bytes, v$rollstat.xacts XActs,

v$rollstat.gets Gets, v$rollstat.waits Waits, v$rollstat.writes Writes,

sys.dba_rollback_segs.status status from v$rollstat, sys.dba_rollback_segs,

v$rollname where v$rollname.name(+) = sys.dba_rollback_segs.segment_name and

v$rollstat.usn (+) = v$rollname.usn order by rownum

15。耗資源的程式（top session）

select s.schemaname schema_name, decode(sign(48 - command), 1,

to_char(command), 'Action Code #' || to_char(command) ) action, status

session_status, s.osuser os_user_name, s.sid, p.spid , s.serial# serial_num,

nvl(s.username, '[Oracle process]') user_name, s.terminal terminal,

s.program program, st.value criteria_value from v$sesstat st, v$session s , v$process p

where st.sid = s.sid and st.statistic# = to_number('38') and ('ALL' = 'ALL'

or s.status = 'ALL') and p.addr = s.paddr order by st.value desc, p.spid asc, s.username asc, s.osuser asc

16。檢視鎖（lock）情況

select /*+ RULE */ ls.osuser os_user_name, ls.username user_name,

decode(ls.type, 'RW', 'Row wait enqueue lock', 'TM', 'DML enqueue lock', 'TX',

'Transaction enqueue lock', 'UL', 'User supplied lock') lock_type,

o.object_name object, decode(ls.lmode, 1, null, 2, 'Row Share', 3,

'Row Exclusive', 4, 'Share', 5, 'Share Row Exclusive', 6, 'Exclusive', null)

lock_mode, o.owner, ls.sid, ls.serial# serial_num, ls.id1, ls.id2

from sys.dba_objects o, ( select s.osuser, s.username, l.type,

l.lmode, s.sid, s.serial#, l.id1, l.id2 from v$session s,

v$lock l where s.sid = l.sid ) ls where o.object_id = ls.id1 and o.owner

<> 'SYS' order by o.owner, o.object_name

17。檢視等待（wait）情況

SELECT v$waitstat.class, v$waitstat.count count, SUM(v$sysstat.value) sum_value

FROM v$waitstat, v$sysstat WHERE v$sysstat.name IN ('db block gets',

'consistent gets') group by v$waitstat.class, v$waitstat.count

18。檢視sga情況

SELECT NAME, BYTES FROM SYS.V_$SGASTAT ORDER BY NAME ASC

19。檢視catched object

SELECT owner, name, db_link, namespace,

type, sharable_mem, loads, executions,

locks, pins, kept FROM v$db_object_cache

20。檢視V$SQLAREA

SELECT SQL_TEXT, SHARABLE_MEM, PERSISTENT_MEM, RUNTIME_MEM, SORTS,

VERSION_COUNT, LOADED_VERSIONS, OPEN_VERSIONS, USERS_OPENING, EXECUTIONS,

USERS_EXECUTING, LOADS, FIRST_LOAD_TIME, INVALIDATIONS, PARSE_CALLS, DISK_READS,

BUFFER_GETS, ROWS_PROCESSED FROM V$SQLAREA