如何计算SQL中间隔内值的出现次数？
我有第一张表，显示了城市每天的降雨量。根据要求，我必须显示一段时间内降雨的天数，如第二个表所示 有什么办法吗？如何计算SQL中间隔内值的出现次数？,sql,sqlite,Sql,Sqlite,我有第一张表，显示了城市每天的降雨量。根据要求，我必须显示一段时间内降雨的天数，如第二个表所示 有什么办法吗？选择城市， SELECT City, sum(case when rain = 0 then 1 else 0 end) as '0', sum(case when (rain> 0 and rain<= 1) then 1 else 0 end) as ']0-1]', sum(case when (ra
选择城市，
SELECT City,
sum(case when rain = 0 then 1 else 0 end) as '0',
sum(case when (rain> 0 and rain<= 1) then 1 else 0 end) as ']0-1]',
sum(case when (rain> 1 and rain<= 2) then 1 else 0 end) as ']1-2]',
sum(case when (rain> 2) then 1 else 0 end) as '>2'
FROM MeteoData
group by City;
总和（雨=0时为1，否则为0结束）为“0”，
求和（当（rain>0，rain 1和rain 2）时，则为1，否则为0结束）为'>2'
来自MeteoData
按城市分组；