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您能否就正確的表的連接順序提供建議,即對於組合我們必須考慮順序的數據的4個表。由於我有在運行查詢的問題,我正在一個ORA-00904
錯誤:在oracle中的表連接順序sql
select countries.country_name, profits.amount_sold, products.prod_name
from countries
join customers on countries.country_id = customers.country_id
join profits on products.prod_id = profits.prod_id
join profits on profits.cust_id = customers.cust_id
WHERE COUNTRY_NAME = 'India'
另外,在查詢中爲表提供別名是一種很好的做法 – ninesided