> ## Documentation Index
> Fetch the complete documentation index at: https://private-7c7dfe99-mintlify-8c05c8a2.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

> Documentation sur le format JSONCompactColumns

# JSONCompactColumns

| Entrée | Sortie | Alias |
| ------ | ------ | ----- |
| ✔      | ✔      |       |

<div id="description">
  ## Description
</div>

Dans ce format, toutes les données sont représentées sous la forme d’un seul tableau JSON.

<Note>
  Le format de sortie `JSONCompactColumns` met toutes les données en mémoire tampon afin de les restituer sous la forme d’un seul bloc, ce qui peut entraîner une consommation mémoire élevée.
</Note>

<div id="example-usage">
  ## Exemple d’utilisation
</div>

<div id="inserting-data">
  ### Insertion de données
</div>

À l’aide d’un fichier JSON nommé `football.json` contenant les données suivantes :

```json theme={null}
[
    ["2022-04-30", "2022-04-30", "2022-04-30", "2022-05-02", "2022-05-02", "2022-05-07", "2022-05-07", "2022-05-07", "2022-05-07", "2022-05-07", "2022-05-07", "2022-05-07", "2022-05-07", "2022-05-07", "2022-05-07", "2022-05-07", "2022-05-07"],
    [2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021],
    ["Sutton United", "Swindon Town", "Tranmere Rovers", "Port Vale", "Salford City", "Barrow", "Bradford City", "Bristol Rovers", "Exeter City", "Harrogate Town A.F.C.", "Hartlepool United", "Leyton Orient", "Mansfield Town", "Newport County", "Oldham Athletic", "Stevenage Borough", "Walsall"],
    ["Bradford City", "Barrow", "Oldham Athletic", "Newport County", "Mansfield Town", "Northampton Town", "Carlisle United", "Scunthorpe United", "Port Vale", "Sutton United", "Colchester United", "Tranmere Rovers", "Forest Green Rovers", "Rochdale", "Crawley Town", "Salford City", "Swindon Town"],
    [1, 2, 2, 1, 2, 1, 2, 7, 0, 0, 0, 0, 2, 0, 3, 4, 0],
    [4, 1, 0, 2, 2, 3, 0, 0, 1, 2, 2, 1, 2, 2, 3, 2, 3]
]
```

Insérez les données :

```sql theme={null}
INSERT INTO football FROM INFILE 'football.json' FORMAT JSONCompactColumns;
```

<div id="reading-data">
  ### Lecture des données
</div>

Lisez les données au format `JSONCompactColumns` :

```sql theme={null}
SELECT *
FROM football
FORMAT JSONCompactColumns
```

La sortie sera au format JSON :

```json theme={null}
[
    ["2022-04-30", "2022-04-30", "2022-04-30", "2022-05-02", "2022-05-02", "2022-05-07", "2022-05-07", "2022-05-07", "2022-05-07", "2022-05-07", "2022-05-07", "2022-05-07", "2022-05-07", "2022-05-07", "2022-05-07", "2022-05-07", "2022-05-07"],
    [2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021],
    ["Sutton United", "Swindon Town", "Tranmere Rovers", "Port Vale", "Salford City", "Barrow", "Bradford City", "Bristol Rovers", "Exeter City", "Harrogate Town A.F.C.", "Hartlepool United", "Leyton Orient", "Mansfield Town", "Newport County", "Oldham Athletic", "Stevenage Borough", "Walsall"],
    ["Bradford City", "Barrow", "Oldham Athletic", "Newport County", "Mansfield Town", "Northampton Town", "Carlisle United", "Scunthorpe United", "Port Vale", "Sutton United", "Colchester United", "Tranmere Rovers", "Forest Green Rovers", "Rochdale", "Crawley Town", "Salford City", "Swindon Town"],
    [1, 2, 2, 1, 2, 1, 2, 7, 0, 0, 0, 0, 2, 0, 3, 4, 0],
    [4, 1, 0, 2, 2, 3, 0, 0, 1, 2, 2, 1, 2, 2, 3, 2, 3]
]
```

Les colonnes absentes du bloc seront renseignées avec leurs valeurs par défaut (vous pouvez utiliser ici le paramètre [`input_format_defaults_for_omitted_fields`](/fr/reference/settings/formats#input_format_defaults_for_omitted_fields))

<div id="format-settings">
  ## Paramètres de format
</div>