「缺少右括號」MySQL錯誤

Question

我試圖運行一個查詢，它會將四捨五入的平均值顯示爲兩位小數。這是我的代碼，我不知道爲什麼我不斷收到錯誤。

SELECT 
    ROUND(AVG (Scholarship, 2)) AS 'Average Scholarships' 
FROM 
    student; 

Answer 1

SELECT ROUND(AVG (Scholarship), 2) AS 'Average Scholarships' FROM student; 

Answer 2

你傳入Scholarship, 2到AVG功能，只期待一個參數。

你的意思做的是通過AVG (Scholarship)和2到ROUND，像這樣：

SELECT ROUND(AVG (Scholarship), 2) AS 'Average Scholarships' FROM student;