How do you select distinct records in MongoDB? This is a pretty basic db functionality *I believe* but I can't seem to find this anywhere else.

Suppose I have a table as follows

```
--------------------------
| Name    | Age          |
--------------------------
|John     | 12           |
|Ben      | 14           |
|Robert   | 14           |
|Ron      | 12           |
--------------------------

```

I would like to run something like `SELECT DISTINCT age FROM names WHERE 1;`