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Update table structure for "ontime" dataset

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Alexey Milovidov 2022-05-29 06:26:13 +03:00 committed by GitHub
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docs/en/getting-started/example-datasets/ontime.md
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@ -5,17 +5,14 @@ description: Dataset containing the on-time performance of airline flights
# OnTime
This dataset can be obtained in two ways:
- import from raw data
- download of prepared partitions
This dataset contains data from Bureau of Transportation Statistics.
## Import from Raw Data {#import-from-raw-data}
Downloading data:
``` bash
wget --no-check-certificate --continue https://transtats.bts.gov/PREZIP/On_Time_Reporting_Carrier_On_Time_Performance_1987_present_{1987..2021}_{1..12}.zip
wget --no-check-certificate --continue https://transtats.bts.gov/PREZIP/On_Time_Reporting_Carrier_On_Time_Performance_1987_present_{1987..2022}_{1..12}.zip
```
Creating a table:
@ -29,141 +26,121 @@ CREATE TABLE `ontime`
`DayofMonth` UInt8,
`DayOfWeek` UInt8,
`FlightDate` Date,
`Reporting_Airline` String,
`Reporting_Airline` LowCardinality(String),
`DOT_ID_Reporting_Airline` Int32,
`IATA_CODE_Reporting_Airline` String,
`Tail_Number` String,
`Flight_Number_Reporting_Airline` String,
`IATA_CODE_Reporting_Airline` LowCardinality(String),
`Tail_Number` LowCardinality(String),
`Flight_Number_Reporting_Airline` LowCardinality(String),
`OriginAirportID` Int32,
`OriginAirportSeqID` Int32,
`OriginCityMarketID` Int32,
`Origin` FixedString(5),
`OriginCityName` String,
`OriginCityName` LowCardinality(String),
`OriginState` FixedString(2),
`OriginStateFips` String,
`OriginStateName` String,
`OriginStateFips` FixedString(2),
`OriginStateName` LowCardinality(String),
`OriginWac` Int32,
`DestAirportID` Int32,
`DestAirportSeqID` Int32,
`DestCityMarketID` Int32,
`Dest` FixedString(5),
`DestCityName` String,
`DestCityName` LowCardinality(String),
`DestState` FixedString(2),
`DestStateFips` String,
`DestStateName` String,
`DestStateFips` FixedString(2),
`DestStateName` LowCardinality(String),
`DestWac` Int32,
`CRSDepTime` Int32,
`DepTime` Int32,
`DepDelay` Int32,
`DepDelayMinutes` Int32,
`DepDel15` Int32,
`DepartureDelayGroups` String,
`DepTimeBlk` String,
`DepartureDelayGroups` LowCardinality(String),
`DepTimeBlk` LowCardinality(String),
`TaxiOut` Int32,
`WheelsOff` Int32,
`WheelsOn` Int32,
`WheelsOff` LowCardinality(String),
`WheelsOn` LowCardinality(String),
`TaxiIn` Int32,
`CRSArrTime` Int32,
`ArrTime` Int32,
`ArrDelay` Int32,
`ArrDelayMinutes` Int32,
`ArrDel15` Int32,
`ArrivalDelayGroups` Int32,
`ArrTimeBlk` String,
`Cancelled` UInt8,
`ArrivalDelayGroups` LowCardinality(String),
`ArrTimeBlk` LowCardinality(String),
`Cancelled` Int8,
`CancellationCode` FixedString(1),
`Diverted` UInt8,
`Diverted` Int8,
`CRSElapsedTime` Int32,
`ActualElapsedTime` Int32,
`AirTime` Nullable(Int32),
`AirTime` Int32,
`Flights` Int32,
`Distance` Int32,
`DistanceGroup` UInt8,
`DistanceGroup` Int8,
`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,
`FirstDepTime` Int16,
`TotalAddGTime` Int16,
`LongestAddGTime` Int16,
`DivAirportLandings` Int8,
`DivReachedDest` Int8,
`DivActualElapsedTime` Int16,
`DivArrDelay` Int16,
`DivDistance` Int16,
`Div1Airport` LowCardinality(String),
`Div1AirportID` Int32,
`Div1AirportSeqID` Int32,
`Div1WheelsOn` String,
`Div1TotalGTime` String,
`Div1LongestGTime` String,
`Div1WheelsOff` String,
`Div1TailNum` String,
`Div2Airport` String,
`Div1WheelsOn` Int16,
`Div1TotalGTime` Int16,
`Div1LongestGTime` Int16,
`Div1WheelsOff` Int16,
`Div1TailNum` LowCardinality(String),
`Div2Airport` LowCardinality(String),
`Div2AirportID` Int32,
`Div2AirportSeqID` Int32,
`Div2WheelsOn` String,
`Div2TotalGTime` String,
`Div2LongestGTime` String,
`Div2WheelsOff` String,
`Div2TailNum` String,
`Div3Airport` String,
`Div2WheelsOn` Int16,
`Div2TotalGTime` Int16,
`Div2LongestGTime` Int16,
`Div2WheelsOff` Int16,
`Div2TailNum` LowCardinality(String),
`Div3Airport` LowCardinality(String),
`Div3AirportID` Int32,
`Div3AirportSeqID` Int32,
`Div3WheelsOn` String,
`Div3TotalGTime` String,
`Div3LongestGTime` String,
`Div3WheelsOff` String,
`Div3TailNum` String,
`Div4Airport` String,
`Div3WheelsOn` Int16,
`Div3TotalGTime` Int16,
`Div3LongestGTime` Int16,
`Div3WheelsOff` Int16,
`Div3TailNum` LowCardinality(String),
`Div4Airport` LowCardinality(String),
`Div4AirportID` Int32,
`Div4AirportSeqID` Int32,
`Div4WheelsOn` String,
`Div4TotalGTime` String,
`Div4LongestGTime` String,
`Div4WheelsOff` String,
`Div4TailNum` String,
`Div5Airport` String,
`Div4WheelsOn` Int16,
`Div4TotalGTime` Int16,
`Div4LongestGTime` Int16,
`Div4WheelsOff` Int16,
`Div4TailNum` LowCardinality(String),
`Div5Airport` LowCardinality(String),
`Div5AirportID` Int32,
`Div5AirportSeqID` Int32,
`Div5WheelsOn` String,
`Div5TotalGTime` String,
`Div5LongestGTime` String,
`Div5WheelsOff` String,
`Div5TailNum` String
) ENGINE = MergeTree
PARTITION BY Year
ORDER BY (IATA_CODE_Reporting_Airline, FlightDate)
SETTINGS index_granularity = 8192;
`Div5WheelsOn` Int16,
`Div5TotalGTime` Int16,
`Div5LongestGTime` Int16,
`Div5WheelsOff` Int16,
`Div5TailNum` LowCardinality(String)
) ENGINE = ReplicatedMergeTree
ORDER BY (Year, Quarter, Month, DayofMonth, FlightDate, IATA_CODE_Reporting_Airline);
```
Loading data with multiple threads:
``` bash
ls -1 *.zip | xargs -I{} -P $(nproc) bash -c "echo {}; unzip -cq {} '*.csv' | sed 's/\.00//g' | clickhouse-client --input_format_with_names_use_header=0 --query='INSERT INTO ontime FORMAT CSVWithNames'"
ls -1 *.zip | xargs -I{} -P $(nproc) bash -c "echo {}; unzip -cq {} '*.csv' | sed 's/\.00//g' | clickhouse-client --input_format_csv_empty_as_default 1 --query='INSERT INTO ontime FORMAT CSVWithNames'"
```
(if you will have memory shortage or other issues on your server, remove the `-P $(nproc)` part)
## Download of Prepared Partitions {#download-of-prepared-partitions}
``` bash
$ curl -O https://datasets.clickhouse.com/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"
```
:::note
If you will run the queries described below, you have to use the full table name, `datasets.ontime`.
:::
!!! info "Info"
If you are using the prepared partitions or the Online Playground replace any occurrence of `IATA_CODE_Reporting_Airline` or `IATA_CODE_Reporting_Airline AS Carrier` in the following queries with `Carrier` (see `describe ontime`).
## Queries {#queries}
Q0.