如何在一個語句中更新兩列？

Question

如何一次更新2列？

我嘗試了下面的語句，它不工作：

UPDATE exercises 
SET times_answered = times_answered + 1 
AND av_answeringTime = av_answeringTime + ((av_answeringTime/(times_answered)) + ?) * (times_answered + 1) 
WHERE name = ? 

Answer 1

使用而不是逗號你的 「​​和」：

UPDATE exercises 
SET times_answered = times_answered + 1, 
    av_answeringTime = av_answeringTime + ((av_answeringTime/(times_answered)) + ?) * (times_answered + 1) 
WHERE name = ? 

Answer 2

嘗試這樣的事情...

UPDATE exercises 
SET times_answered = times_answered + 1, 
av_answeringTime = av_answeringTime + ((av_answeringTime/(times_answered)) + ?) * (times_answered + 1) 
WHERE name = ? 

Answer 3

SQL UPDATE語法是：

UPDATE table SET 
    column1 = value1, 
    column2 = value2 
WHERE condition 

而不是你需要一個逗號