1つのステートメントで2つの列を更新するには？

Question

一度に2列を更新するにはどうすればよいですか？

私は動作しません。次の文を、試してみました：

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

Answer 1

ではなく、あなたの "AND" のカンマを使用します。

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

Answer 2

はこのような何かを試してみてください...

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の構文は次のとおりです。

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

ANDの代わりにカンマが必要