cristianodabc

```python
class Journal:
    def __init__(self, date):
        self.date = date


class Meeting(Journal):
    def __init__(self, date, time):
        super().__init__(date)
        self.time = time

cristianodabc

```sql
SELECT 
  json_agg(
    json_build_object(
     'first_name', u.first_name, 
     'last_name', u.last_name, 
     'email', u.email 
   )
) FROM users AS u
```