如何在一个语句中更新两列？

Question

如何一次更新2列？

我尝试了以下声明，但不起作用：

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

Answer 1

使用逗号而不是“AND”：

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

Answer 2

SQL UPDATE语法是：

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

而不是AND，你需要一个逗号

Answer 3

尝试这样的事情......

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