> ## Documentation Index
> Fetch the complete documentation index at: https://private-7c7dfe99-mintlify-1d264819.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

> Documentação do formato JSONColumns

# JSONColumns

| Entrada | Saída | Alias |
| ------- | ----- | ----- |
| ✔       | ✔     |       |

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

<Tip>
  A saída dos formatos JSONColumns\* fornece o nome do campo no ClickHouse e, em seguida, o conteúdo de cada linha da tabela para esse campo;
  visualmente, os dados são rotacionados 90 graus para a esquerda.
</Tip>

Neste formato, todos os dados são representados como um único objeto JSON.

<Note>
  O formato `JSONColumns` mantém todos os dados em memória e depois os gera como um único bloco, portanto isso pode levar a um alto consumo de memória.
</Note>

<div id="example-usage">
  ## Exemplo de uso
</div>

<div id="inserting-data">
  ### Inserção de dados
</div>

Usando um arquivo JSON com os dados a seguir, chamado `football.json`:

```json theme={null}
{
    "date": ["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"],
    "season": [2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021],
    "home_team": ["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"],
    "away_team": ["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"],
    "home_team_goals": [1, 2, 2, 1, 2, 1, 2, 7, 0, 0, 0, 0, 2, 0, 3, 4, 0],
    "away_team_goals": [4, 1, 0, 2, 2, 3, 0, 0, 1, 2, 2, 1, 2, 2, 3, 2, 3]
}
```

Insira os dados:

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

<div id="reading-data">
  ### Leitura de dados
</div>

Leia os dados usando o formato `JSONColumns`:

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

A saída será em formato JSON:

```json theme={null}
{
    "date": ["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"],
    "season": [2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021, 2021],
    "home_team": ["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"],
    "away_team": ["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"],
    "home_team_goals": [1, 2, 2, 1, 2, 1, 2, 7, 0, 0, 0, 0, 2, 0, 3, 4, 0],
    "away_team_goals": [4, 1, 0, 2, 2, 3, 0, 0, 1, 2, 2, 1, 2, 2, 3, 2, 3]
}
```

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

Durante a importação, colunas com nomes desconhecidos serão ignoradas se a configuração [`input_format_skip_unknown_fields`](/pt-BR/reference/settings/formats#input_format_skip_unknown_fields) estiver definida como `1`.
As colunas que não estiverem presentes no bloco serão preenchidas com valores padrão (aqui, você pode usar a configuração [`input_format_defaults_for_omitted_fields`](/pt-BR/reference/settings/formats#input_format_defaults_for_omitted_fields))