Detect OLAP Option used and installed

Question: What can I do to see if I have OLAP used and installed?

Answer:  To see if OLAP  is used and installed, you can run these queries:

prompt *******************************************
prompt checking for OLAP features installed
prompt ******************************************* 

col c1 heading 'OLAP|Installed' format a20 

select 
   decode(count(*), 0, 'No', 'Yes') c1
from 
   v$option
where 
   parameter = 'OLAP'; 

prompt *******************************************
prompt checking for OLAP features used
prompt ******************************************* 

col c1 heading 'OLAP|Used' format a20

select 
   decode(count(*), 0, 'No', 'Yes') c1
from 
   dba_feature_usage_statistics
where 
   name like '%OLAP%'
and 
   first_usage_date is not null; 

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