例如
if(activity_type="start", -1*timestamp, timestamp)
CASE
when activity_type="start" then -1*timestamp
when activity_type="end" then timestamp
end
没有IF函数, 可以用Case When代替
阅读 28
2024-09-09
例如
if(activity_type="start", -1*timestamp, timestamp)
CASE
when activity_type="start" then -1*timestamp
when activity_type="end" then timestamp
end
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