> ## 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.

> JSONCompactColumns フォーマットのドキュメント

# JSONCompactColumns

| 入力 | 出力 | エイリアス |
| -- | -- | ----- |
| ✔  | ✔  |       |

<div id="description">
  ## 説明
</div>

このフォーマットでは、すべてのデータは 1 つの JSON Array として表現されます。

<Note>
  `JSONCompactColumns` 出力フォーマットは、すべてのデータを 1 つのブロックとして出力するためにメモリ上にバッファするため、メモリ消費量が大きくなる可能性があります。
</Note>

<div id="example-usage">
  ## 使用例
</div>

<div id="inserting-data">
  ### データの挿入
</div>

次のデータを含む `football.json` という名前の JSON ファイルを使用します。

```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]
]
```

データを挿入します:

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

<div id="reading-data">
  ### データの読み取り
</div>

`JSONCompactColumns` フォーマットを使用してデータを読み取ります。

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

出力はJSONフォーマットです:

```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]
]
```

ブロックに含まれないカラムはデフォルト値で補完されます (この場合は [`input_format_defaults_for_omitted_fields`](/ja/reference/settings/formats#input_format_defaults_for_omitted_fields) 設定を使用できます)

<div id="format-settings">
  ## フォーマット設定
</div>