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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)