I have a table in Clickhouse that has a `properties` column. This column is a **JSON type column** and stores an object with several keys and values. No arrays, just a single object with multiple keys and values.

What I am trying to do is to build a list of all the unique key names present in the column.

So, if the column has this object:

```
{ age: '25'}

```

And also this object:

```
{ genre: 'pop'}

```

I'd like to retrieve `age` and `genre` as results for this query.

Any way this can be done?