錯誤（ORA-00923：FROM關鍵字未找到預期）

Question

select 
     country_olympic_name, 
     SUM(part_gold) as 'Number of Gold Medals' 
    From 
     games.country, 
     games.participation 
    where 
     participation.country_isocode = country.country_isocode 
    group by 
     country_olympic_name; 

我已經越來越錯誤ORA-00923：FROM關鍵字未找到預期，不知道是什麼原因，請大家幫忙

Answer 1

標識符需要用雙引號引用（"）。單引號（'）表示字符值（不是「名稱」）。

爲此，你需要使用：

SUM(part_gold) as "Number of Gold Medals" 

更多細節的手冊中：

• Database Object Names and Qualifiers
• Text literals

Answer 2

你可以試試這樣做： -

select 
    country_olympic_name, 
    SUM(part_gold) as "Number of Gold Medals" 
From 
    games.country, 
    games.participation 
where 
    participation.country_isocode = country.country_isocode 
group by 
    country_olympic_name; 

Answer 3

嘗試......

SELECT 
     COUNTRY_OLYMPIC_NAME, 
     SUM (PART_GOLD) AS NUMBER_OF_GOLD_MEDALS 
FROM 
     GAMES.COUNTRY, 
     GAMES.PARTICIPATION 
WHERE 
     PARTICIPATION.COUNTRY_ISOCODE = COUNTRY.COUNTRY_ISOCODE 
GROUP BY 
     COUNTRY_OLYMPIC_NAME;