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# PostgreSQL jsonb_build_array() Function

**Summary**: in this tutorial, you will learn how to use the PostgreSQL `jsonb_build_array()` function to create a JSON array.

## Introduction to the PostgreSQL jsonb_build_array() function

The `jsonb_build_array()` function allows you to construct a JSONB array from a variadic list of arguments.

Here's the basic syntax of the `jsonb_build_array()` function:

```sql
jsonb_build_array ( VARIADIC "any" ) → jsonb
```

In this syntax, you provide a list of arguments that you want to convert to elements of a JSON array.

The `jsonb_build_array()` will convert each argument using the [`to_jsonb()`](https://neon.com/postgresql/postgresql-json-functions/postgresql-to_jsonb) function.

## PostgreSQL jsonb_build_array() function examples

Let's take some examples of using the `jsonb_build_array()` function.

### 1) Basic PostgreSQL jsonb_build_array() function example

The following example uses the `jsonb_build_array()` function to create a JSON array from a list of values:

```sql
SELECT jsonb_build_array(10, null, 'Hi', true) result;
```

Output:

```text
         result
------------------------
 [10, null, "Hi", true]
(1 row)
```

### 2) Using PostgreSQL jsonb_build_array() function with table data

We'll use the `film` table from the [sample database](../postgresql-getting-started/postgresql-sample-database):

![](https://neon.com/postgresqltutorial/film.png)The following example uses the `jsonb_build_array()` function to convert the title and length of each film into elements of a JSON array:

```sql
SELECT
  jsonb_build_array(title, length)
FROM
  film
ORDER BY
  title;
```

Output:

```text
          jsonb_build_array
--------------------------------------
 ["Academy Dinosaur", 86]
 ["Ace Goldfinger", 48]
 ["Adaptation Holes", 50]
 ["Affair Prejudice", 117]
...
```

## Summary

- Use the PostgreSQL `jsonb_build_array()` function to create a `JSONB` array from a variadic list of arguments.

---

## Related docs (JSON Functions)

- [Extracting JSON Data](https://neon.com/postgresql/postgresql-json-functions/postgresql-json-extract)
- [JSONB Operators](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb-operators)
- [jsonb_agg](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_agg)
- [jsonb_array_elements](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_array_elements)
- [jsonb_array_elements_text](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_array_elements_text)
- [jsonb_array_length](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_array_length)
- [jsonb_build_object](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_build_object)
- [jsonb_each](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_each)
- [jsonb_each_text](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_each_text)
- [jsonb_extract_path](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_extract_path)
- [jsonb_extract_path_text](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_extract_path_text)
- [jsonb_insert](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_insert)
- [jsonb_object](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_object)
- [jsonb_object_agg](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_object_agg)
- [jsonb_object_keys](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_object_keys)
- [JSON Path](https://neon.com/postgresql/postgresql-json-functions/postgresql-json-path)
- [jsonb_path_exists](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_path_exists)
- [jsonb_path_query](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_path_query)
- [jsonb_path_query_array](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_path_query_array)
- [jsonb_path_query_first](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_path_query_first)
- [jsonb_pretty](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_pretty)
- [jsonb_set](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_set)
- [jsonb_strip_nulls](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_strip_nulls)
- [jsonb_to_record](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_to_record)
- [jsonb_populate_record](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_populate_record)
- [jsonb_populate_recordset](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_populate_recordset)
- [jsonb_typeof](https://neon.com/postgresql/postgresql-json-functions/postgresql-jsonb_typeof)
- [row_to_json](https://neon.com/postgresql/postgresql-json-functions/postgresql-row_to_json)
- [to_jsonb](https://neon.com/postgresql/postgresql-json-functions/postgresql-to_jsonb)