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Articles Oracle numeric functions Number format Sequence dbms_lob dbms_output Oracle substr Using a ref cursor How to use the CASE statement How to use the DECODE statement How to use the NVL statement Oracle training Oracle certification Create statistics dbms_profiler explained How to use hints Autonomous transaction Oracle date format Oracle sysdate Rename tables, columns to_date function Scheduling in 10g How to use utl_http	Undocumented Oracle hints With hints one can influence the optimizer. The usage of hints (with exception of the RULE-hint) causes Oracle to use the Cost Based optimizer. The following syntax is used for hints: select /*+ HINT */ name from emp where id =1; Where HINT is replaced by the hint text. The following hints are undocumented: See Oracle hints for documented hints. BYPASS_RECURSIVE_CHECK BYPASS_UJVC CACHE_CB CACHE_TEMP_TABLE CIV_GB COLLECTIONS_GET_REFS CUBE_GB CURSOR_SHARING_EXACT DEREF_NO_REWRITE DML_UPDATE DOMAIN_INDEX_NO_SORT DOMAIN_INDEX_SORT DYNAMIC_SAMPLING DYNAMIC_SAMPLING_EST_CDN EXPAND_GSET_TO_UNION FORCE_SAMPLE_BLOCK GBY_CONC_ROLLUP GLOBAL_TABLE_HINTS HWM_BROKERED IGNORE_ON_CLAUSE IGNORE_WHERE_CLAUSE INDEX_RRS INDEX_SS INDEX_SS_ASC INDEX_SS_DESC LIKE_EXPAND LOCAL_INDEXES MV_MERGE NESTED_TABLE_GET_REFS NESTED_TABLE_SET_REFS NESTED_TABLE_SET_SETID NO_EXPAND_GSET_TO_UNION NO_FACT NO_FILTERING NO_ORDER_ROLLUPS NO_PRUNE_GSETS NO_STATS_GSETS NO_UNNEST NOCPU_COSTING OVERFLOW_NOMOVE PIV_GB PIV_SSF PQ_MAP PQ_NOMAP REMOTE_MAPPED RESTORE_AS_INTERVALS SAVE_AS_INTERVALS SCN_ASCENDING SKIP_EXT_OPTIMIZER SQLLDR SYS_DL_CURSOR SYS_PARALLEL_TXN SYS_RID_ORDER TIV_GB TIV_SSF UNNEST USE_TTT_FOR_GSETS