CREATE OR REPLACE VIEW OE.ACCOUNT_MANAGERS AS SELECT c.account_mgr_id ACCT_MGR, cr.region_id REGION, c.cust_address.country_id COUNTRY, c.cust_address.state_province PROVINCE, count(*) NUM_CUSTOMERS FROM customers c, countries cr WHERE c.cust_address.country_id = cr.country_id GROUP BY ROLLUP (c.account_mgr_id, cr.region_id, c.cust_address.country_id, c.cust_address.state_province)