oracle数据库元数据SQL查询

1、oracle 数据库经典 SQL 查询1、查看表空间的名称及大小selectt.tablespace_name,round(sum(bytes/(1024*1024),0)ts_sizefromdba_tablespacest,dba_data_filesdwheret.tablespace_name=d.tablespace_namegroupbyt.tablespace_name;2、查看表空间物理文件的名称及大小selecttablespace_name,file_id,file_name,round(bytes/(1024*1024),0)total_spacefromdba_data

2、_filesorderbytablespace_name;3、查看回滚段名称及大小selectsegment_name,tablespace_name,r.status,(initial_extent/1024)InitialExtent,(next_extent/1024)NextExtent,max_extents,v.curextCurExtentFromdba_rollback_segsr,v$rollstatvWherer.segment_id=v.usn(+)orderbysegment_name;4、查看控制文件 selectnamefromv$controlfile;5、查看日

3、志文件 selectmemberfromv$logfile;6、查看表空间的使用情况selectsum(bytes)/(1024*1024)asfree_space,tablespace_namefromdba_free_spacegroupbytablespace_name;SELECTA.TABLESPACE_NAME,A.BYTESTOTAL,B.BYTESUSED,C.BYTESFREE,(B.BYTES*100)/A.BYTES%USED,(C.BYTES*100)/A.BYTES%FREEFROMSYS.SM$TS_AVAILA,SYS.SM$TS_USEDB,SYS.SM$TS_

4、FREECWHEREA.TABLESPACE_NAME=B.TABLESPACE_NAMEANDA.TABLESPACE_NAME=C.TABLESPACE_NAME;7、查看数据库库对象selectowner,object_type,status,count(*)count#fromall_objectsgroupbyowner,object_type,status;8、查看数据库的版本SelectversionFROMProduct_component_versionWhereSUBSTR(PRODUCT,1,6)=Oracle;9、查看数据库的创建日期和归档方式SelectCreated

5、,Log_Mode,Log_ModeFromV$Database;10、捕捉运行很久的 SQLcolumnusernameformata12columnopnameformata16columnprogressformata8selectusername,sid,opname,round(sofar*100/totalwork,0)|%asprogress,time_remaining,sql_textfromv$session_longops,v$sqlwheretime_remaining0andsql_address=addressandsql_hash_value=hash_value

6、/11。查看数据表的参数信息SELECTpartition_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,l

7、ast_analyzedFROMdba_tab_partitions-WHEREtable_name=:tnameANDtable_owner=:townerORDERBYpartition_position12.查看还没提交的事务select*fromv$locked_object;select*fromv$transaction;13。查找 object 为哪些进程所用 selectp.spid,s.sid,s.serial#serial_num,s.usernameuser_name,a.typeobject_type,s.osuseros_user_name,a.owner,a.obj

8、ectobject_name,decode(sign(48-command),1,to_char(command),ActionCode#|to_char(command)action,gramoracle_process,s.terminalterminal,gramprogram,s.statussession_statusfromv$sessions,v$accessa,v$processpwheres.paddr=p.addrand5.type=USERanda.sid=s.sidanda.object=SUBSCR 旧 ER_ATTRorderbys.userna

9、me,s.osuser14。回滚段查看selectrownum,sys.dba_rollback_segs.segment_nameName,v$rollstat.extentsExtents,v$rollstat.rssizeSize_in_Bytes,v$rollstat.xactsXActs,v$rollstat.getsGets,v$rollstat.waitsWaits,v$rollstat.writesWrites,sys.dba_rollback_segs.statusstatusfromv$rollstat,sys.dba_rollback_segs,v$rollnamewhe

10、rev$(+)=sys.dba_rollback_segs.segment_nameandv$rollstat.usn(+)=v$rollname.usnorderbyrownum15。耗资源的进程(topsession)selects.schemanameschema_name,1,一to_char(command),ActionCode#|statussession_status,s.osuseros_user_name,p.spid,s.serial#serial_num,nvl(s.username,Oracleprocessterminal,gra

11、mprogram,st.valuecriteria_valuefromst,v$sessions,v$processpwherest.sid=s.sidandst.statistic#(ALL=ALLors.status=ALL)andp.addr=s.paddrp.spidasc,s.usernameasc,s.osuser16。查看锁(lock)情况select/*+RULE*/ls.osuseros_user_name,ls.usernameuser_name,decode(ls.type,RWenqueuelock,TX,Transactionenqueuelock,UL,Usersu

12、ppliedlock)lock_type,o.object_nameobject,decode(ls.lmode,1,null,2,RowShare,3,RowExclusive,4,Share,5,ShareRowExclusive,6,Exclusive,null)lock_mode,o.owner,ls.sid,ls.serial#serial_num,ls.id1,ls.id2一fromsys.dba_objectso,(selects.osuser,s.username,l.type,l.lmode,s.sid,s.serial#,l.id1,l.id2fromv$sessions,

13、v$locklwheres.sid=l.sid)lswhereo.object_id=ls.id1ando.ownerSYSorderbyo.owner,o.object_name17。查看等待(wait)情况SELECTv$waitstat.class,v$waitstat.countcount,SUM(v$sysstat.value)sum_valueFROMv$waitstat,v$sysstatWHEREv$IN(dbblockgets,consistentgets)groupbyv$waitstat.class,v$waitstat.count18。查看 sg

14、a 情况SELECTNAMEBYTESFROMSYS.V_$SGASTATORDERBYNAMEASCdecode(sign(48to_char(command)s.sid,)user_name,-command),)action,s.terminalv$sesstat=to_number(38orderbyst.valueasc)anddesc,RowwaitenqueuelockTM,DML20。查看 V$SQLAREASELECTSQL_TEXT,SHARABLE_MEM,PERSISTENT_MEM,RUNTIME_MEM,SORTS,VERSION_COUNT,LOADED_VERS

15、IONS,OPEN_VERSIONS,USERS_OPENING,EXECUTIONS,USERS_EXECUTING,LOADS,FIRST_LOAD_TIME,INVALIDATIONS,PARSE_CALLS,DISK_READS,BUFFER_GETS,ROWS_PROCESSEDFROMV$SQLAREA21。查看 object 分类数量selectdecode(o.type#,1,INDEX,2,TABLE,3,CLUSTER,4,VIEW,5,SYNONYM,6,SEQUENCE,OTHER)object_type,count(*)quantityfromsys.obj$owhe

16、reo.type#1groupbydecode(o.type#,1,INDEX,2,TABLE,3,CLUSTER,4,VIEW,5,SYNONYM,6,SEQUENCE,OTHER)unionselectCOLUMN,count(*)fromsys.col$unionselectDBLINK,count(*)fromsum(decode(o.type#,6,1,NULL)sequences,sum(decode(o.type#,1,NULL,2,NULL,3,NULL,4,NULL,5,NULL,6,NULL,1)othersfromsys.obj$o,sys.user$uwhereo.ty

17、pe#=1andu.user#=o.owner#PUBLICorderbysys.link$unionselectCONSTRAINT,count(*)fromsys.con$23。有关 connection 的相关信息1）查看有哪些用户连接selects.osuseros_user_name,decode(sign(48-command),1,to_char(command),ActionCode#|to_char(command)action,gramoracle_process,19。查看 catchedobjectSELECTown

18、er,name,namespace,type,executions,locks,pins,v$db_object_cachesharable_mem,keptdb_link,loads,FROM22。按用户查看 object 种类schema,indexes,sum(decode(o.type#,2,sum(decode(o.type#,clusters,sum(decode(o.sum(decode(o.type#,sum(decode(o.type#,1,11,NULL)tables,3,1,NULL)type#,4,1,NULL)views5,1,NULL)NUL

19、L)synonyms,statussession_status,s.terminalterminal,gramprogram,s.usernameuser_name,s.fixed_table_sequenceactivity_meter,query,0memory,0max_memory,0cpu_usage,s.sid,s.serial#serial_numfromv$sessions,v$processpwheres.paddr=p.addrands.type=USERorderbys.username,s.osuser2)根据 v.sid 查看对应连接的资源占用等情况sele

20、,v.value,n.class,n.statistic#fromv$statnamen,v$sesstatvwherev.sid=71andv.statistic#=n.statistic#orderbyn.class,n.statistic#3)根据 sid 查看对应连接正在运行的 sqlselect/*+PUSH_SUBQ*/command_type,sql_text,sharable_mem,persistent_mem,runtime_mem,sorts,version_count,loaded_versions,open_versions,users_opening

21、,executions,users_executing,loads,first_load_time,invalidations,parse_calls,disk_reads,buffer_gets,rows_processed,sysdatestart_time,sysdatefinish_time,|addresssql_address,Nstatusfromv$sqlareawhereaddress=(selectsql_addressfromv$sessionwheresid=71)一24 .查询表空间使用情况selecta.tablespace_name表空间名称,100-round(

22、nvl(b.bytes_free,0)/a.bytes_alloc)*100,2)”占用率(%),round(a.bytes_alloc/1024/1024,2)”容量(M)”,round(nvl(b.bytes_free,0)/1024/1024,2)空闲(M),round(a.bytes_alloc-nvl(b.bytes_free,0)/1024/1024,2)”使用(M),Largest最天犷展段(M),to_char(sysdate,yyyy-mm-ddhh24:mi:ss)采样时间from(selectf.tablespace_name,sum(f.bytes)bytes_alloc,sum(decode(f.autoextensible,YES,f.maxbytes,NO,f.bytes)maxbytesfromdba_data_filesfgroupbytablespace_name)a,(selectf.tablespace_name,sum(f.bytes)bytes_freefromdba_free_spacefgroupbytablespace_name)b,(selectround(max(ff.length)*16/1024,2)Largest,tablespace