title_wip

[Edit this page](https://github.com/ClickHouse/clickhouse-docs/blob/main/docs/getting-started/example-datasets/ontime.md)

This dataset contains data from Bureau of Transportation Statistics.

## Creating a table[​](#creating-a-table "Direct link to Creating a table")

```
CREATE TABLE `ontime`
(
    `Year`                            UInt16,
    `Quarter`                         UInt8,
    `Month`                           UInt8,
    `DayofMonth`                      UInt8,
    `DayOfWeek`                       UInt8,
    `FlightDate`                      Date,
    `Reporting_Airline`               LowCardinality(String),
    `DOT_ID_Reporting_Airline`        Int32,
    `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`                  LowCardinality(String),
    `OriginState`                     FixedString(2),
    `OriginStateFips`                 FixedString(2),
    `OriginStateName`                 LowCardinality(String),
    `OriginWac`                       Int32,
    `DestAirportID`                   Int32,
    `DestAirportSeqID`                Int32,
    `DestCityMarketID`                Int32,
    `Dest`                            FixedString(5),
    `DestCityName`                    LowCardinality(String),
    `DestState`                       FixedString(2),
    `DestStateFips`                   FixedString(2),
    `DestStateName`                   LowCardinality(String),
    `DestWac`                         Int32,
    `CRSDepTime`                      Int32,
    `DepTime`                         Int32,
    `DepDelay`                        Int32,
    `DepDelayMinutes`                 Int32,
    `DepDel15`                        Int32,
    `DepartureDelayGroups`            LowCardinality(String),
    `DepTimeBlk`                      LowCardinality(String),
    `TaxiOut`                         Int32,
    `WheelsOff`                       LowCardinality(String),
    `WheelsOn`                        LowCardinality(String),
    `TaxiIn`                          Int32,
    `CRSArrTime`                      Int32,
    `ArrTime`                         Int32,
    `ArrDelay`                        Int32,
    `ArrDelayMinutes`                 Int32,
    `ArrDel15`                        Int32,
    `ArrivalDelayGroups`              LowCardinality(String),
    `ArrTimeBlk`                      LowCardinality(String),
    `Cancelled`                       Int8,
    `CancellationCode`                FixedString(1),
    `Diverted`                        Int8,
    `CRSElapsedTime`                  Int32,
    `ActualElapsedTime`               Int32,
    `AirTime`                         Int32,
    `Flights`                         Int32,
    `Distance`                        Int32,
    `DistanceGroup`                   Int8,
    `CarrierDelay`                    Int32,
    `WeatherDelay`                    Int32,
    `NASDelay`                        Int32,
    `SecurityDelay`                   Int32,
    `LateAircraftDelay`               Int32,
    `FirstDepTime`                    Int16,
    `TotalAddGTime`                   Int16,
    `LongestAddGTime`                 Int16,
    `DivAirportLandings`              Int8,
    `DivReachedDest`                  Int8,
    `DivActualElapsedTime`            Int16,
    `DivArrDelay`                     Int16,
    `DivDistance`                     Int16,
    `Div1Airport`                     LowCardinality(String),
    `Div1AirportID`                   Int32,
    `Div1AirportSeqID`                Int32,
    `Div1WheelsOn`                    Int16,
    `Div1TotalGTime`                  Int16,
    `Div1LongestGTime`                Int16,
    `Div1WheelsOff`                   Int16,
    `Div1TailNum`                     LowCardinality(String),
    `Div2Airport`                     LowCardinality(String),
    `Div2AirportID`                   Int32,
    `Div2AirportSeqID`                Int32,
    `Div2WheelsOn`                    Int16,
    `Div2TotalGTime`                  Int16,
    `Div2LongestGTime`                Int16,
    `Div2WheelsOff`                   Int16,
    `Div2TailNum`                     LowCardinality(String),
    `Div3Airport`                     LowCardinality(String),
    `Div3AirportID`                   Int32,
    `Div3AirportSeqID`                Int32,
    `Div3WheelsOn`                    Int16,
    `Div3TotalGTime`                  Int16,
    `Div3LongestGTime`                Int16,
    `Div3WheelsOff`                   Int16,
    `Div3TailNum`                     LowCardinality(String),
    `Div4Airport`                     LowCardinality(String),
    `Div4AirportID`                   Int32,
    `Div4AirportSeqID`                Int32,
    `Div4WheelsOn`                    Int16,
    `Div4TotalGTime`                  Int16,
    `Div4LongestGTime`                Int16,
    `Div4WheelsOff`                   Int16,
    `Div4TailNum`                     LowCardinality(String),
    `Div5Airport`                     LowCardinality(String),
    `Div5AirportID`                   Int32,
    `Div5AirportSeqID`                Int32,
    `Div5WheelsOn`                    Int16,
    `Div5TotalGTime`                  Int16,
    `Div5LongestGTime`                Int16,
    `Div5WheelsOff`                   Int16,
    `Div5TailNum`                     LowCardinality(String)
) ENGINE = MergeTree
  ORDER BY (Year, Quarter, Month, DayofMonth, FlightDate, IATA_CODE_Reporting_Airline);
```

## Import from raw data[​](#import-from-raw-data "Direct link to Import from raw data")

Downloading data:

```
wget --no-check-certificate --continue https://transtats.bts.gov/PREZIP/On_Time_Reporting_Carrier_On_Time_Performance_1987_present_{1987..2022}_{1..12}.zip
```

Loading data with multiple threads:

```
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)

## Import from a saved copy[​](#import-from-a-saved-copy "Direct link to Import from a saved copy")

Alternatively, you can import data from a saved copy by the following query:

```
INSERT INTO ontime SELECT * FROM s3('https://clickhouse-public-datasets.s3.amazonaws.com/ontime/csv_by_year/*.csv.gz', CSVWithNames) SETTINGS max_insert_threads = 40;
```

The snapshot was created on 2022-05-29.

## Queries[​](#queries "Direct link to Queries")

Q0.

```
SELECT avg(c1)
FROM
(
    SELECT Year, Month, count(*) AS c1
    FROM ontime
    GROUP BY Year, Month
);
```

Q1. The number of flights per day from the year 2000 to 2008

```
SELECT DayOfWeek, count(*) AS c
FROM ontime
WHERE Year>=2000 AND Year<=2008
GROUP BY DayOfWeek
ORDER BY c DESC;
```

Q2. The number of flights delayed by more than 10 minutes, grouped by the day of the week, for 2000-2008

```
SELECT DayOfWeek, count(*) AS c
FROM ontime
WHERE DepDelay>10 AND Year>=2000 AND Year<=2008
GROUP BY DayOfWeek
ORDER BY c DESC;
```

Q3. The number of delays by the airport for 2000-2008

```
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. The number of delays by carrier for 2007

```
SELECT IATA_CODE_Reporting_Airline AS Carrier, count(*)
FROM ontime
WHERE DepDelay>10 AND Year=2007
GROUP BY Carrier
ORDER BY count(*) DESC;
```

Q5. The percentage of delays by carrier for 2007