DolphinDB计算TIMESTAMP和DATETIME的时间差？

Question

我在 DolphinDB 中尝试了脚本：

t =table(
array(DATETIME, 0) as MDTime,
array(TIMESTAMP, 0) as ReceivedTime
)
share t as testShareTable;
select * from testShareTable;
select avg(ReceivedTime - MDTime) as DelayTime from testShareTable;

桌子是

但输出却不如预期

对修改代码有什么建议吗？顺便说一句，我想为 ReceivedTime 增加 8 小时。如何获得结果？

Answer 1

修改最后一行代码：

select avg(temporalAdd(ReceivedTime,8H) - timestamp(MDTime)) as DelayTime from testShareTable;