oracle系统表详解(中文)

Oracle常用系统表dba_开头dba_users数据库用户信息dba_segments表段信息dba_objects数据库对象信息dba_extents数据区信息dba_tablespaces数据库表空间信息dba_data_files数据文件设置信息dba_temp_files临时数据文件信息dba_rollback_segs回滚段信息dba_ts_quotas用户表空间配额信息dba_free_space数据库空闲空间信息dba_profiles数据库用户资源限制信息dba_sys_privs用户的系统权限信息dba_tab_privs用户具有的对象权限信息dba_col_privs用户具有的列对象权限信息dba_role_privs用户具有的角色信息dba_audit_trail审计跟踪记录信息dba_stmt_audit_opts审计设置信息dba_audit_object对象审计结果信息dba_audit_session会话审计结果信息dba_indexes用户模式的索引信息user_开头user_objects用户对象信息user_source数据库用户的所有资源对象信息user_segments用户的表段信息user_tables用户的表对象信息user_tab_columns用户的表列信息user_constraints用户的对象约束信息user_sys_privs当前用户的系统权限信息user_tab_privs当前用户的对象权限信息user_col_privs当前用户的表列权限信息user_role_privs当前用户的角色权限信息user_indexes用户的索引信息user_ind_columns用户的索引对应的表列信息user_cons_columns用户的约束对应的表列信息user_clusters用户的所有簇信息user_clu_columns用户的簇所包含的内容信息user_cluster_hash_expressions散列簇的信息v$开头v$database数据库信息v$datafile数据文件信息v$controlfile控制文件信息v$logfile重做日志信息v$instance数据库实例信息v$log日志组信息v$loghist日志历史信息v$sga数据库SGA信息v$parameter初始化参数信息v$process数据库服务器进程信息v$bgprocess数据库后台进程信息v$controlfile_record_section控制文件记载的各部分信息v$thread线程信息v$datafile_header数据文件头所记载的信息v$archived_log归档日志信息v$archive_dest归档日志的设置信息v$logmnr_contents归档日志分析的DMLDDL结果信息v$logmnr_dictionary日志分析的字典文件信息v$logmnr_logs日志分析的日志列表信息v$tablespace表空间信息v$tempfile临时文件信息v$filestat数据文件的I/O统计信息v$undostatUndo数据信息v$rollname在线回滚段信息v$session会话信息v$transaction事务信息v$rollstat回滚段统计信息v$pwfile_users特权用户信息v$sqlarea当前查询过的sql语句访问过的资源及相关的信息v$sql与v$sqlarea基本相同的相关信息v$sysstat数据库系统状态信息all_开头all_users数据库所有用户的信息all_objects数据库所有的对象的信息all_def_audit_opts所有默认的审计设置信息all_tables所有的表对象信息all_indexes所有的数据库对象索引的信息session_开头session_roles会话的角色信息session_privs会话的权限信息index_开头index_stats索引的设置和存储信息伪表dual系统伪列表信息dba_usersColumnDatatypeNULLDescriptionUSERNAMEVARCHAR2(30)NOTNULLNameoftheuserUSER_IDNUMBERNOTNULLIDnumberoftheuserPASSWORDVARCHAR2(30)Encryptedpassword（加密）ACCOUNT_STATUSVARCHAR2(32)NOTNULLAccountstatus:OPENEXPIRED（到期）EXPIRED(GRACE)LOCKED(TIMED)LOCKEDEXPIRED&LOCKED(TIMED)EXPIRED(GRACE)&LOCKED(TIMED)EXPIRED&LOCKEDEXPIRED(GRACE)&LOCKEDLOCK_DATEDATEDatetheaccountwaslockedifaccountstatuswasLOCKEDEXPIRY_DATEDATEDateofexpirationoftheaccountDEFAULT_TABLESPACEVARCHAR2(30)NOTNULLDefaulttablespacefordataTEMPORARY_TABLESPACEVARCHAR2(30)NOTNULLNameofthedefaulttablespacefortemporarytablesorthenameofatablespacegroupCREATEDDATENOTNULLUsercreationdatePROFILEVARCHAR2(30)NOTNULLUserresourceprofilenameINITIAL_RSRC_CONSUMER_GROUPVARCHAR2(30)InitialresourceconsumergroupfortheuserEXTERNAL_NAMEVARCHAR2(4000)Userexternalnamedba_segmentsColumnDatatypeNULLDescriptionOWNERVARCHAR2(30)UsernameofthesegmentownerSEGMENT_NAMEVARCHAR2(81)Name,ifany,ofthesegmentPARTITION_NAMEVARCHAR2(30)ObjectPartitionName(SettoNULLfornon-partitionedobjects)SEGMENT_TYPEVARCHAR2(18)Typeofsegment:INDEXPARTITION,TABLEPARTITION,TABLE,CLUSTER,INDEX,ROLLBACK,DEFERREDROLLBACK,TEMPORARY,CACHE,LOBSEGMENTandLOBINDEXTABLESPACE_NAMEVARCHAR2(30)NameofthetablespacecontainingthesegmentHEADER_FILENUMBERIDofthefilecontainingthesegmentheaderHEADER_BLOCKNUMBERIDoftheblockcontainingthesegmentheaderBYTESNUMBERSize,inbytes,ofthesegmentBLOCKSNUMBERSize,inOracleblocks,ofthesegmentEXTENTSNUMBERNumberofextentsallocatedtothesegmentINITIAL_EXTENTNUMBERSizeinbytesrequestedfortheinitialextentofthesegmentatcreatetime.(Oracleroundstheextentsizetomultiplesof5blocksiftherequestedsizeisgreaterthan5blocks.)NEXT_EXTENTNUMBERSizeinbytesofthenextextenttobeallocatedtothesegmentMIN_EXTENTSNUMBERMinimumnumberofextentsallowedinthesegmentMAX_EXTENTSNUMBERMaximumnumberofextentsallowedinthesegmentPCT_INCREASENUMBERPercentbywhichtoincreasethesizeofthenextextenttobeallocatedFREELISTSNUMBERNumberofprocessfreelistsallocatedtothissegmentFREELIST_GROUPSNUMBERNumberoffreelistgroupsallocatedtothissegmentRELATIVE_FNONUMBERRelativefilenumberofthesegmentheaderBUFFER_POOLVARCHAR2(7)Defaultbufferpoolfortheobjectdba_objectsColumnDatatypeNULLDescriptionOWNERVARCHAR2(30)NOTNULLOwneroftheobjectOBJECT_NAMEVARCHAR2(30)NOTNULLNameoftheobjectSUBOBJECT_NAMEVARCHAR2(30)Nameofthesubobject(forexample,partition)OBJECT_IDNUMBERNOTNULLDictionaryobjectnumberoftheobjectDATA_OBJECT_IDNUMBERDictionaryobjectnumberofthesegmentthatcontainstheobjectNote:OBJECT_IDandDATA_OBJECT_IDdisplaydatadictionarymetadata.Donotconfusethesenumberswiththeunique16-byteobjectidentifier(objectID)thattheOracleDatabaseassignstorowobjectsinobjecttablesinthesystem.OBJECT_TYPEVARCHAR2(19)Typeoftheobject(suchasTABLE,INDEX)CREATEDDATENOTNULLTimestampforthecreationoftheobjectLAST_DDL_TIMEDATENOTNULLTimestampforthelastmodificationoftheobjectresultingfromaDDLstatement(includinggrantsandrevokes)TIMESTAMPVARCHAR2(20)Timestampforthespecificationoftheobject(characterdata)STATUSVARCHAR2(7)Statusoftheobject(VALID,INVALID,orN/A)TEMPORARYVARCHAR2(1)Whethertheobjectistemporary(thecurrentsessioncanseeonlydatathatitplacedinthisobjectitself)GENERATEDVARCHAR2(1)Indicateswhetherthenameofthisobjectwassystemgenerated(Y)ornot(N)SECONDARYVARCHAR2(1)WhetherthisisasecondaryobjectcreatedbytheODCIIndexCreatemethodoftheOracleDataC