【正文】 Indicates whether the name of the index is system generated (Y) or not (N)SECONDARYVARCHAR2(1)Indicates whether a nonpartitioned index is VALID or UNUSABLENUM_ROWSNUMBERB*Tree level: depth of the index from its root block to its leaf blocks. A depth of 0 indicates that the root block and leaf block are the same.LEAF_BLOCKS*NUMBERMaximum number of extents allowed in the segmentPCT_INCREASENUMBERIndicates whether index pression is enabled (ENABLED) or not (DISABLED)PREFIX_LENGTHNUMBERType of the index: 2004 Security violationCLIENT_IDVARCHAR2(64)Date and time of the creation of the audit trail entry (date and time of user login for entries created by AUDIT SESSION) in the local database session time zoneACTION_NAMEVARCHAR2(28)System change number (SCN) of the querySQL_BINDNVARCHAR2(2000)Client identifier in each Oracle sessionSESSION_CPUNUMBERName of the action type corresponding to the numeric code in the ACTION column in DBA_AUDIT_TRAILNEW_OWNERVARCHAR2(30)Operating system login username of the user whose actions were auditedUSERNAMEVARCHAR2(30)Transaction identifier of the transaction in which the object is accessed or modifiedSCNNUMBERClient identifier in each Oracle sessionECONTEXT_IDVARCHAR2(64)Text ment on the audit trail entry, providing more information about the statement audited Also indicates how the user was authenticated. The method can be one of the following: S SuccessNew name of the object after a RENAME or the name of the underlying objectOBJ_PRIVILEGEVARCHAR2(16)Client host machine nameTERMINALVARCHAR2(255)Indicates whether the privilege was granted with the GRANT OPTION (YES) or not (NO)HIERARCHYVARCHAR2(3)Starting block number of the extentBYTESNUMBERNumber of bytes charged to the userMAX_BYTESNUMBERSize of the useful portion of the file (in bytes)USER_BLOCKSNUMBERSize of the file (in Oracle blocks)STATUSCHAR(9) SYSOFFRelative file numberAUTOEXTENSIBLEVARCHAR2(3)Undo tablespace retention: Indicates whether the extents in the tablespace are dictionary managed (DICTIONARY) or locally managed (LOCAL)ALLOCATION_TYPEVARCHAR2(9)Tablespace contents: Default incremental extent sizeMIN_EXTENTSNUMBERNOT NULLDefault minimum number of extentsMAX_EXTENTSNUMBERName of the tablespace containing the extentEXTENT_IDNUMBERStatus of the object (VALID, INVALID, or N/A)TEMPORARYVARCHAR2(1)Default buffer pool for the objectdba_objectsColumnDatatypeNULLDescriptionOWNERVARCHAR2(30)NOT NULLOwner of the objectOBJECT_NAMEVARCHAR2(30)NOT NULLName of the objectSUBOBJECT_NAMEVARCHAR2(30)Size in bytes requested for the initial extent of the segment at create time. (Oracle rounds the extent size to multiples of 5 blocks if the requested size is greater than 5 blocks.)NEXT_EXTENTNUMBERObject Partition Name (Set to NULL for nonpartitioned objects)SEGMENT_TYPEVARCHAR2(18) EXPIRED(GRACE) amp。 LOCKED(TIMED) OPEN LOCKED(TIMED)User external namedba_segmentsColumnDatatypeNULLDescriptionOWNERVARCHAR2(30)Size, in bytes, of the segmentBLOCKSNUMBERNumber of process freelists allocated to this segmentFREELIST_GROUPSNUMBERNote: OBJECT_ID and DATA_OBJECT_ID display data dictionary metadata. Do not confuse these numbers with the unique 16byte object identifier (object ID) that the Oracle Database assigns to row objects in object tables in the system.OBJECT_TYPEVARCHAR2(19)Name of the segment associated with the extentPARTITION_NAMEVARCHAR2(30)Size of the extent in Oracle blocksRELATIVE_FNONUMBER ONLINE LOGGINGIndicates whether the tablespace is plugged in (YES) or not (NO)SEGMENT_SPACE_MANAGEMENTVARCHAR2(6)Name of the database fileFILE_IDNUMBERNOT NULLFile identifier number of the database fileTABLESPACE_NAMEVARCHAR2(30)NOT NULLName of the tablespace to which the file belongsBYTESNUMBERThe size of the file available for user data. The actual size of the file minus the USER_BYTES value is used to store file related metadata.USER_BLOCKSNUMBERName of the database temp fileFILE_IDNUMBERmaximum size of the file (in bytes)MAXBLOCKSNUMBERPercent increase for extent sizeSTATUSVARCHAR2(16)Whether the tablespace has been droppeddba_free_spaceColumnDatatypeNULLDescriptionTABLESPACE_NAMEVARCHAR2(30)Limit placed on this resource for this profiledba_sys_privs ColumnDatatypeNULLDescriptionGRANTEEVARCHAR2(30)NOT NULLGrantee name, user, or role receiving the grantUSERNAMEVARCHAR2(30)Indicates whether the role is designated as a DEFAULT ROLE for the user (YES) or not (NO)dba_audit_trailColumnDatatypeNULLDescriptionOS_USERNAMEVARCHAR2(255)Name of the object affected by the actionACTIONNUMBERNOT NULLNumeric action type code. The corresponding name of the action type is in the ACTION_NAME column.ACTION_NAMEVARCHAR2(28)Auditing option set with the AUDIT statementSES_ACTIONSVARCHAR2(19)Physical reads for the sessionLOGOFF_LWRITENUMBER 0 Action succeededGlobal user identifier for the user, if the user has logged in as an enterprise userINSTANCE_NUMBERNUMBERThe name of the proxy user which is performing an operation for the client. NULL if the client is performing the operation directly.AUDIT_OPTIONVARCHAR2(40)NOT NULLName of the system auditing optionSUCCESSVARCHAR2(10)Date and time of the creation of the audit trail entry (date and time of user login for entries created by AUDIT SESSION) in the local database session time zoneOWNERVARCHAR2(30) 0 Action succeededInstance number as specified by the INSTANCE_NUMBER initialization paramet