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# Dapatkan panjang dan ukuran array JSON
<a name="length-and-size"></a>

Untuk mendapatkan panjang dan ukuran array JSON, Anda dapat menggunakan `json_array_length` dan `json_size` fungsi.

## Contoh: `json_array_length`
<a name="example-json-array-length"></a>

Untuk mendapatkan panjang larik dikodekan JSON, gunakan fungsi `json_array_length`.

```
WITH dataset AS (
  SELECT * FROM (VALUES
    (JSON '{"name":
            "Bob Smith",
            "org":
            "legal",
            "projects": [{"name":"project1", "completed":false}]}'),
    (JSON '{"name": "Susan Smith",
            "org": "engineering",
            "projects": [{"name":"project2", "completed":true},
                         {"name":"project3", "completed":true}]}'),
    (JSON '{"name": "Jane Smith",
             "org": "finance",
             "projects": [{"name":"project2", "completed":true}]}')
  ) AS t (users)
)
SELECT
  json_extract_scalar(users, '$.name') as name,
  json_array_length(json_extract(users, '$.projects')) as count
FROM dataset
ORDER BY count DESC
```

Kueri ini mengembalikan hasil ini:

```
+---------------------+
| name        | count |
+---------------------+
| Susan Smith | 2     |
+---------------------+
| Bob Smith   | 1     |
+---------------------+
| Jane Smith  | 1     |
+---------------------+
```

## Contoh: `json_size`
<a name="example-json-size"></a>

Untuk mendapatkan ukuran larik atau objek dikodekan JSON, gunakan fungsi `json_size` dan tentukan kolom yang berisi string JSON dan ekspresi `JSONPath` untuk larik atau objek.

```
WITH dataset AS (
  SELECT * FROM (VALUES
    (JSON '{"name": "Bob Smith", "org": "legal", "projects": [{"name":"project1", "completed":false}]}'),
    (JSON '{"name": "Susan Smith", "org": "engineering", "projects": [{"name":"project2", "completed":true},{"name":"project3", "completed":true}]}'),
    (JSON '{"name": "Jane Smith", "org": "finance", "projects": [{"name":"project2", "completed":true}]}')
  ) AS t (users)
)
SELECT
  json_extract_scalar(users, '$.name') as name,
  json_size(users, '$.projects') as count
FROM dataset
ORDER BY count DESC
```

Kueri ini mengembalikan hasil ini:

```
+---------------------+
| name        | count |
+---------------------+
| Susan Smith | 2     |
+---------------------+
| Bob Smith   | 1     |
+---------------------+
| Jane Smith  | 1     |
+---------------------+
```