# OnTime دانلود داده ها:
```bash for s in `seq 1987 2017` do for m in `seq 1 12` do wget http://transtats.bts.gov/PREZIP/On_Time_On_Time_Performance_${s}_${m}.zip done done ```
(از ) ساخت جدول:
``` sql CREATE TABLE `ontime` ( `Year` UInt16, `Quarter` UInt8, `Month` UInt8, `DayofMonth` UInt8, `DayOfWeek` UInt8, `FlightDate` Date, `UniqueCarrier` FixedString(7), `AirlineID` Int32, `Carrier` FixedString(2), `TailNum` String, `FlightNum` String, `OriginAirportID` Int32, `OriginAirportSeqID` Int32, `OriginCityMarketID` Int32, `Origin` FixedString(5), `OriginCityName` String, `OriginState` FixedString(2), `OriginStateFips` String, `OriginStateName` String, `OriginWac` Int32, `DestAirportID` Int32, `DestAirportSeqID` Int32, `DestCityMarketID` Int32, `Dest` FixedString(5), `DestCityName` String, `DestState` FixedString(2), `DestStateFips` String, `DestStateName` String, `DestWac` Int32, `CRSDepTime` Int32, `DepTime` Int32, `DepDelay` Int32, `DepDelayMinutes` Int32, `DepDel15` Int32, `DepartureDelayGroups` String, `DepTimeBlk` String, `TaxiOut` Int32, `WheelsOff` Int32, `WheelsOn` Int32, `TaxiIn` Int32, `CRSArrTime` Int32, `ArrTime` Int32, `ArrDelay` Int32, `ArrDelayMinutes` Int32, `ArrDel15` Int32, `ArrivalDelayGroups` Int32, `ArrTimeBlk` String, `Cancelled` UInt8, `CancellationCode` FixedString(1), `Diverted` UInt8, `CRSElapsedTime` Int32, `ActualElapsedTime` Int32, `AirTime` Int32, `Flights` Int32, `Distance` Int32, `DistanceGroup` UInt8, `CarrierDelay` Int32, `WeatherDelay` Int32, `NASDelay` Int32, `SecurityDelay` Int32, `LateAircraftDelay` Int32, `FirstDepTime` String, `TotalAddGTime` String, `LongestAddGTime` String, `DivAirportLandings` String, `DivReachedDest` String, `DivActualElapsedTime` String, `DivArrDelay` String, `DivDistance` String, `Div1Airport` String, `Div1AirportID` Int32, `Div1AirportSeqID` Int32, `Div1WheelsOn` String, `Div1TotalGTime` String, `Div1LongestGTime` String, `Div1WheelsOff` String, `Div1TailNum` String, `Div2Airport` String, `Div2AirportID` Int32, `Div2AirportSeqID` Int32, `Div2WheelsOn` String, `Div2TotalGTime` String, `Div2LongestGTime` String, `Div2WheelsOff` String, `Div2TailNum` String, `Div3Airport` String, `Div3AirportID` Int32, `Div3AirportSeqID` Int32, `Div3WheelsOn` String, `Div3TotalGTime` String, `Div3LongestGTime` String, `Div3WheelsOff` String, `Div3TailNum` String, `Div4Airport` String, `Div4AirportID` Int32, `Div4AirportSeqID` Int32, `Div4WheelsOn` String, `Div4TotalGTime` String, `Div4LongestGTime` String, `Div4WheelsOff` String, `Div4TailNum` String, `Div5Airport` String, `Div5AirportID` Int32, `Div5AirportSeqID` Int32, `Div5WheelsOn` String, `Div5TotalGTime` String, `Div5LongestGTime` String, `Div5WheelsOff` String, `Div5TailNum` String ) ENGINE = MergeTree(FlightDate, (Year, FlightDate), 8192) ```
Load داده ها:
```bash for i in *.zip; do echo $i; unzip -cq $i '*.csv' | sed 's/\.00//g' | clickhouse-client --host=example-perftest01j --query="INSERT INTO ontime FORMAT CSVWithNames"; done ```
query ها: Q0.
``` sql select avg(c1) from (select Year, Month, count(*) as c1 from ontime group by Year, Month); ```
Q1. تعداد پروازهای به تفکیک روز از تاریخ 2000 تا 2008
``` sql SELECT DayOfWeek, count(*) AS c FROM ontime WHERE Year >= 2000 AND Year <= 2008 GROUP BY DayOfWeek ORDER BY c DESC; ```
Q2. تعداد پروازهای بیش از 10 دقیقه تاخیر خورده، گروه بندی براساس روزهای هفته از سال 2000 تا 2008
``` sql SELECT DayOfWeek, count(*) AS c FROM ontime WHERE DepDelay>10 AND Year >= 2000 AND Year <= 2008 GROUP BY DayOfWeek ORDER BY c DESC ```
Q3. تعداد تاخیرها براساس airport از سال 2000 تا 2008
``` sql SELECT Origin, count(*) AS c FROM ontime WHERE DepDelay>10 AND Year >= 2000 AND Year <= 2008 GROUP BY Origin ORDER BY c DESC LIMIT 10 ```
Q4. تعداد تاخیرها براساس carrier در سال 78
``` sql SELECT Carrier, count(*) FROM ontime WHERE DepDelay>10 AND Year = 2007 GROUP BY Carrier ORDER BY count(*) DESC ```
Q5. درصد تاخیر ها براساس carrier در سال 2007
``` sql SELECT Carrier, c, c2, c*1000/c2 as c3 FROM ( SELECT Carrier, count(*) AS c FROM ontime WHERE DepDelay>10 AND Year=2007 GROUP BY Carrier ) ANY INNER JOIN ( SELECT Carrier, count(*) AS c2 FROM ontime WHERE Year=2007 GROUP BY Carrier ) USING Carrier ORDER BY c3 DESC; ```
نسخه ی بهتر query
``` sql SELECT Carrier, avg(DepDelay > 10) * 1000 AS c3 FROM ontime WHERE Year = 2007 GROUP BY Carrier ORDER BY Carrier ```
Q6. مانند query قبلی اما برای طیف وسیعی از سال های 2000 تا 2008
``` sql SELECT Carrier, c, c2, c*1000/c2 as c3 FROM ( SELECT Carrier, count(*) AS c FROM ontime WHERE DepDelay>10 AND Year >= 2000 AND Year <= 2008 GROUP BY Carrier ) ANY INNER JOIN ( SELECT Carrier, count(*) AS c2 FROM ontime WHERE Year >= 2000 AND Year <= 2008 GROUP BY Carrier ) USING Carrier ORDER BY c3 DESC; ```
نسخه ی بهتر query
``` sql SELECT Carrier, avg(DepDelay > 10) * 1000 AS c3 FROM ontime WHERE Year >= 2000 AND Year <= 2008 GROUP BY Carrier ORDER BY Carrier ```
Q7. درصد تاخیر بیش از 10 دقیقه پروازها به تفکیک سال
``` sql SELECT Year, c1/c2 FROM ( select Year, count(*)*1000 as c1 from ontime WHERE DepDelay>10 GROUP BY Year ) ANY INNER JOIN ( select Year, count(*) as c2 from ontime GROUP BY Year ) USING (Year) ORDER BY Year ```
نسخه ی بهتر query
``` sql SELECT Year, avg(DepDelay > 10) FROM ontime GROUP BY Year ORDER BY Year ```
Q8. مقصدهای پرطرفدار براساس تعداد اتصال های مستقیم شهرها برای سال 2000 تا 2010
``` sql SELECT DestCityName, uniqExact(OriginCityName) AS u FROM ontime WHERE Year >= 2000 and Year <= 2010 GROUP BY DestCityName ORDER BY u DESC LIMIT 10; ```
Q9.
``` sql select Year, count(*) as c1 from ontime group by Year; ```
Q10.
``` sql select min(Year), max(Year), Carrier, count(*) as cnt, sum(ArrDelayMinutes>30) as flights_delayed, round(sum(ArrDelayMinutes>30)/count(*),2) as rate FROM ontime WHERE DayOfWeek not in (6,7) and OriginState not in ('AK', 'HI', 'PR', 'VI') and DestState not in ('AK', 'HI', 'PR', 'VI') and FlightDate < '2010-01-01' GROUP by Carrier HAVING cnt > 100000 and max(Year) > 1990 ORDER by rate DESC LIMIT 1000; ```
query های بیشتر:
``` sql SELECT avg(cnt) FROM (SELECT Year,Month,count(*) AS cnt FROM ontime WHERE DepDel15=1 GROUP BY Year,Month) select avg(c1) from (select Year,Month,count(*) as c1 from ontime group by Year,Month) SELECT DestCityName, uniqExact(OriginCityName) AS u FROM ontime GROUP BY DestCityName ORDER BY u DESC LIMIT 10; SELECT OriginCityName, DestCityName, count() AS c FROM ontime GROUP BY OriginCityName, DestCityName ORDER BY c DESC LIMIT 10; SELECT OriginCityName, count() AS c FROM ontime GROUP BY OriginCityName ORDER BY c DESC LIMIT 10; ```
این تست های performance توسط Vadim Tkachenko انجام شده است. برای اطلاعات بیشتر به لینک های زیر مراجعه کنید: - - - - - -
[مقاله اصلی](https://clickhouse.yandex/docs/fa/getting_started/example_datasets/ontime/)