How to create BITMAP index in Oracle 11G

How to create BITMAP index in Oracle 11G

Example - Create bitmap index on the historyABC column of the PO table

SYNTEX -  

CREATE BITMAP INDEX 
emp_bitmap_idx
ON index_demo (gender);


SQL>CREATE BITMAP INDEX  PO_HISTORYFLAG_IDX  ON MXPRE.PO(historyABC);

SQL>execdbms_stats.gather_index_stats(OWNNAME=>'SYS',INDNAME=>'PO_HISTORYFLAG_IDX');