示例代码如下：
t = table(`A`A`A`A`B`B`B`B as symbol, 09:28m 09:29m 09:30m 09:31m 09:28m 09:29m 09:30m 09:31m as minute, 10 20 30 40 20 15 25 10 as volume)
update t set volume = volume+move_volume from (select *,move(volume,1) from t context by symbol) where minute = 09:31m