Thanks for your help.
One more question, how to create the apex-olap.sql and workspace.sql for OLAP myself?
if you Google the 2 files, you can find it
jmniard, thanks for your information.
I mean if I had created the OLAP database, how to generate the sql script to import the workspace? Do I need write the script by myself?
I remember one day I created a table in normal database by pl/sql, but in APEX I couldn't find that table.