Delete Statistics from a Schema

-- delete all statistics
DECLARE
CURSOR cOwner IS SELECT DISTINCT owner
               FROM dba_tables
                WHERE owner NOT IN ('SYS','SYSTEM','DBSNMP',);
BEGIN
 -- analyze sOwner,compute
 FOR rOwner IN cOwner LOOP
    DBMS_STATS.DELETE_SCHEMA_STATS
    (ownname => rOwner.owner);
 END LOOP;
END;
/
select 'END_DATE: '||to_char(sysdate,'dd.mm.yyyy hh24:mi:ss') as end_date from dual;
exit