New Oracle Database

When I create an Oracle database it has a lot of tables in it with strange names. What are these tables? Should I keep them? If not, how can I avoid creating them?

These are the table names:

LOGMNR_UID$ LOGMNR_SESSION_EVOLVE$ LOGMNR_GLOBAL$ LOGMNR_RESTART_CKPT_TXINFO$ LOGMNR_AGE_SPILL$ LOGMNR_SPILL$ LOGMNRC_DBNAME_UID_MAP LOGMNR_LOG$ LOGMNR_ERROR$ LOGMNR_PROCESSED_LOG$ LOGMNR_FILTER$ LOGMNR_RESTART_CKPT$ LOGMNR_GT_TAB_INCLUDE$ LOGMNR_GT_USER_INCLUDE$ LOGMNRT_MDDL$ OL$ OL$HINTS OL$NODES LOGMNR_DICTSTATE$ LOGMNRC_GTLO LOGMNRC_GTCS LOGMNRC_GSII LOGMNR_SEED$ LOGMNR_DICTIONARY$ LOGMNR_OBJ$ LOGMNR_TAB$ LOGMNR_COL$ LOGMNR_ATTRCOL$ LOGMNR_TS$ LOGMNR_IND$ LOGMNR_USER$ LOGMNR_TABPART$ LOGMNR_TABSUBPART$ LOGMNR_TABCOMPART$ LOGMNR_TYPE$ LOGMNR_COLTYPE$ LOGMNR_ATTRIBUTE$ LOGMNR_LOB$ LOGMNR_CDEF$ LOGMNR_CCOL$ LOGMNR_ICOL$ LOGMNR_LOBFRAG$ LOGMNR_INDPART$ LOGMNR_INDSUBPART$ LOGMNR_INDCOMPART$ LOGMNR_LOGMNR_BUILDLOG LOGMNR_NTAB$ LOGMNR_OPQTYPE$ LOGMNR_SUBCOLTYPE$ LOGMNR_KOPM$ LOGMNR_PROPS$ LOGMNR_ENC$ LOGMNR_REFCON$ LOGMNR_PARTOBJ$ LOGMNRP_CTAS_PART_MAP LOGSTDBY$APPLY_PROGRESS MVIEW$_ADV_OWB DEF$_AQERROR DEF$_AQCALL MVIEW$_ADV_PARTITION MVIEW$_ADV_INDEX HELP SQLPLUS_PRODUCT_PROFILE LOGSTDBY$HISTORY LOGSTDBY$SKIP_SUPPORT LOGSTDBY$SKIP LOGSTDBY$SKIP_TRANSACTION LOGSTDBY$PLSQL LOGSTDBY$FLASHBACK_SCN LOGSTDBY$SCN LOGSTDBY$APPLY_MILESTONE LOGSTDBY$EVENTS LOGSTDBY$PARAMETERS REPCAT$_SITES_NEW REPCAT$_EXTENSION REPCAT$_INSTANTIATION_DDL REPCAT$_EXCEPTIONS REPCAT$_TEMPLATE_TARGETS REPCAT$_RUNTIME_PARMS REPCAT$_SITE_OBJECTS REPCAT$_TEMPLATE_SITES REPCAT$_USER_PARM_VALUES REPCAT$_OBJECT_PARMS REPCAT$_TEMPLATE_PARMS REPCAT$_TEMPLATE_OBJECTS REPCAT$_TEMPLATE_REFGROUPS REPCAT$_OBJECT_TYPES REPCAT$_USER_AUTHORIZATIONS REPCAT$_REFRESH_TEMPLATES REPCAT$_T开发者_Go百科EMPLATE_TYPES REPCAT$_TEMPLATE_STATUS REPCAT$_FLAVOR_OBJECTS REPCAT$_AUDIT_COLUMN REPCAT$_AUDIT_ATTRIBUTE REPCAT$_PARAMETER_COLUMN REPCAT$_RESOL_STATS_CONTROL REPCAT$_RESOLUTION_STATISTICS REPCAT$_RESOLUTION REPCAT$_RESOLUTION_METHOD REPCAT$_CONFLICT REPCAT$_GROUPED_COLUMN REPCAT$_COLUMN_GROUP REPCAT$_PRIORITY REPCAT$_PRIORITY_GROUP REPCAT$_REPGROUP_PRIVS REPCAT$_DDL REPCAT$_REPCATLOG REPCAT$_REPPROP REPCAT$_GENERATED REPCAT$_KEY_COLUMNS REPCAT$_REPCOLUMN REPCAT$_REPOBJECT REPCAT$_SNAPGROUP REPCAT$_REPSCHEMA REPCAT$_FLAVORS REPCAT$_REPCAT DEF$_PUSHED_TRANSACTIONS DEF$_ORIGIN DEF$_PROPAGATOR DEF$_TEMP$LOB DEF$_LOB DEF$_DEFAULTDEST DEF$_CALLDEST DEF$_DESTINATION DEF$_ERROR AQ$_INTERNET_AGENT_PRIVS AQ$_INTERNET_AGENTS AQ$_SCHEDULES AQ$_QUEUES AQ$_QUEUE_TABLES MVIEW$_ADV_PLAN MVIEW$_ADV_JOURNAL MVIEW$_ADV_INFO MVIEW$_ADV_PARAMETERS MVIEW$_ADV_EXCEPTIONS MVIEW$_ADV_OUTPUT MVIEW$_ADV_ELIGIBLE MVIEW$_ADV_CLIQUE MVIEW$_ADV_GC MVIEW$_ADV_FJG MVIEW$_ADV_AJG MVIEW$_ADV_ROLLUP MVIEW$_ADV_LEVEL MVIEW$_ADV_FILTERINSTANCE MVIEW$_ADV_LOG MVIEW$_ADV_FILTER MVIEW$_ADV_TEMP MVIEW$_ADV_PRETTY MVIEW$_ADV_SQLDEPEND MVIEW$_ADV_BASETABLE MVIEW$_ADV_WORKLOAD LOGMNR_SESSION$ LOGMNR_PARAMETER$

The tables you have listed relate to Oracle's LogMiner utility, Materialized Views and Advanced Replication among other things. You should leave these alone.

It is called the data dictionary, where Oracle stores information on its modules and tables. See the Oracle documentation.

If you select custom installation, you may select to not install modules. Which gives you less modules, and a smaller data dictionary.