mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-12 18:45:20 +00:00
413 lines
8.9 KiB
Markdown
413 lines
8.9 KiB
Markdown
---
|
|
machine_translated: true
|
|
machine_translated_rev: 72537a2d527c63c07aa5d2361a8829f3895cf2bd
|
|
toc_priority: 15
|
|
toc_title: A tiempo
|
|
---
|
|
|
|
# A tiempo {#ontime}
|
|
|
|
Este conjunto de datos se puede obtener de dos maneras:
|
|
|
|
- importación de datos sin procesar
|
|
- descarga de particiones preparadas
|
|
|
|
## Importar desde datos sin procesar {#import-from-raw-data}
|
|
|
|
Descarga de datos:
|
|
|
|
``` bash
|
|
for s in `seq 1987 2018`
|
|
do
|
|
for m in `seq 1 12`
|
|
do
|
|
wget https://transtats.bts.gov/PREZIP/On_Time_Reporting_Carrier_On_Time_Performance_1987_present_${s}_${m}.zip
|
|
done
|
|
done
|
|
```
|
|
|
|
(a partir de https://github.com/Percona-Lab/ontime-airline-performance/blob/master/download.sh )
|
|
|
|
Creación de una tabla:
|
|
|
|
``` 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
|
|
PARTITION BY Year
|
|
ORDER BY (Carrier, FlightDate)
|
|
SETTINGS index_granularity = 8192;
|
|
```
|
|
|
|
Carga de datos:
|
|
|
|
``` 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
|
|
```
|
|
|
|
## Descarga de Prepared Partitions {#download-of-prepared-partitions}
|
|
|
|
``` bash
|
|
$ curl -O https://datasets.clickhouse.tech/ontime/partitions/ontime.tar
|
|
$ tar xvf ontime.tar -C /var/lib/clickhouse # path to ClickHouse data directory
|
|
$ # check permissions of unpacked data, fix if required
|
|
$ sudo service clickhouse-server restart
|
|
$ clickhouse-client --query "select count(*) from datasets.ontime"
|
|
```
|
|
|
|
!!! info "INFO"
|
|
Si va a ejecutar las consultas que se describen a continuación, debe usar el nombre completo de la tabla, `datasets.ontime`.
|
|
|
|
## Consulta {#queries}
|
|
|
|
Q0.
|
|
|
|
``` sql
|
|
SELECT avg(c1)
|
|
FROM
|
|
(
|
|
SELECT Year, Month, count(*) AS c1
|
|
FROM ontime
|
|
GROUP BY Year, Month
|
|
);
|
|
```
|
|
|
|
Q1. El número de vuelos por día desde el año 2000 hasta 2008
|
|
|
|
``` sql
|
|
SELECT DayOfWeek, count(*) AS c
|
|
FROM ontime
|
|
WHERE Year>=2000 AND Year<=2008
|
|
GROUP BY DayOfWeek
|
|
ORDER BY c DESC;
|
|
```
|
|
|
|
Preguntas frecuentes El número de vuelos retrasados por más de 10 minutos, agrupados por el día de la semana, para 2000-2008
|
|
|
|
``` 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. El número de retrasos por parte del aeropuerto para 2000-2008
|
|
|
|
``` 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;
|
|
```
|
|
|
|
Preguntas más frecuentes Número de retrasos por transportista para 2007
|
|
|
|
``` sql
|
|
SELECT Carrier, count(*)
|
|
FROM ontime
|
|
WHERE DepDelay>10 AND Year=2007
|
|
GROUP BY Carrier
|
|
ORDER BY count(*) DESC;
|
|
```
|
|
|
|
Q5. El porcentaje de retrasos por transportista para 2007
|
|
|
|
``` sql
|
|
SELECT Carrier, c, c2, c*100/c2 as c3
|
|
FROM
|
|
(
|
|
SELECT
|
|
Carrier,
|
|
count(*) AS c
|
|
FROM ontime
|
|
WHERE DepDelay>10
|
|
AND Year=2007
|
|
GROUP BY Carrier
|
|
)
|
|
JOIN
|
|
(
|
|
SELECT
|
|
Carrier,
|
|
count(*) AS c2
|
|
FROM ontime
|
|
WHERE Year=2007
|
|
GROUP BY Carrier
|
|
) USING Carrier
|
|
ORDER BY c3 DESC;
|
|
```
|
|
|
|
Mejor versión de la misma consulta:
|
|
|
|
``` sql
|
|
SELECT Carrier, avg(DepDelay>10)*100 AS c3
|
|
FROM ontime
|
|
WHERE Year=2007
|
|
GROUP BY Carrier
|
|
ORDER BY c3 DESC
|
|
```
|
|
|
|
¿Por qué? La solicitud anterior de una gama más amplia de años, 2000-2008
|
|
|
|
``` sql
|
|
SELECT Carrier, c, c2, c*100/c2 as c3
|
|
FROM
|
|
(
|
|
SELECT
|
|
Carrier,
|
|
count(*) AS c
|
|
FROM ontime
|
|
WHERE DepDelay>10
|
|
AND Year>=2000 AND Year<=2008
|
|
GROUP BY Carrier
|
|
)
|
|
JOIN
|
|
(
|
|
SELECT
|
|
Carrier,
|
|
count(*) AS c2
|
|
FROM ontime
|
|
WHERE Year>=2000 AND Year<=2008
|
|
GROUP BY Carrier
|
|
) USING Carrier
|
|
ORDER BY c3 DESC;
|
|
```
|
|
|
|
Mejor versión de la misma consulta:
|
|
|
|
``` sql
|
|
SELECT Carrier, avg(DepDelay>10)*100 AS c3
|
|
FROM ontime
|
|
WHERE Year>=2000 AND Year<=2008
|
|
GROUP BY Carrier
|
|
ORDER BY c3 DESC;
|
|
```
|
|
|
|
Preguntas frecuentes Porcentaje de vuelos retrasados por más de 10 minutos, por año
|
|
|
|
``` sql
|
|
SELECT Year, c1/c2
|
|
FROM
|
|
(
|
|
select
|
|
Year,
|
|
count(*)*100 as c1
|
|
from ontime
|
|
WHERE DepDelay>10
|
|
GROUP BY Year
|
|
)
|
|
JOIN
|
|
(
|
|
select
|
|
Year,
|
|
count(*) as c2
|
|
from ontime
|
|
GROUP BY Year
|
|
) USING (Year)
|
|
ORDER BY Year;
|
|
```
|
|
|
|
Mejor versión de la misma consulta:
|
|
|
|
``` sql
|
|
SELECT Year, avg(DepDelay>10)*100
|
|
FROM ontime
|
|
GROUP BY Year
|
|
ORDER BY Year;
|
|
```
|
|
|
|
¿Por qué? Los destinos más populares por el número de ciudades conectadas directamente para varios rangos de año
|
|
|
|
``` 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;
|
|
```
|
|
|
|
Bono:
|
|
|
|
``` 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;
|
|
```
|
|
|
|
Esta prueba de rendimiento fue creada por Vadim Tkachenko. Ver:
|
|
|
|
- https://www.percona.com/blog/2009/10/02/analyzing-air-traffic-performance-with-infobright-and-monetdb/
|
|
- https://www.percona.com/blog/2009/10/26/air-traffic-queries-in-luciddb/
|
|
- https://www.percona.com/blog/2009/11/02/air-traffic-queries-in-infinidb-early-alpha/
|
|
- https://www.percona.com/blog/2014/04/21/using-apache-hadoop-and-impala-together-with-mysql-for-data-analysis/
|
|
- https://www.percona.com/blog/2016/01/07/apache-spark-with-air-ontime-performance-data/
|
|
- http://nickmakos.blogspot.ru/2012/08/analyzing-air-traffic-performance-with.html
|
|
|
|
[Artículo Original](https://clickhouse.tech/docs/en/getting_started/example_datasets/ontime/) <!--hide-->
|