我正在尝试从mysql中获取本地时间,并用它来减去ruby时间。from_db = "2017-01-08 15:51:09" #this is from mysql database LOCALTIMESTAMP() functionlocal_timeTime.now.utc
local_timestamp = local_time.strftime("%Y-%m-%d %H:%M:%S") #converting to same f
在PostgreSQL和MySQL表中,我有一个时间戳列,它指示数据导入时间戳。这是根据预定的间隔。我需要为负载找到avg(或近似)时间间隔。( PostgreSQL和MySQL)select avg(starttime),但它的展示,
Invalid operation: function avg(timestamp without