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```console
❯ tree data/
data/
├── c
│ ├── 1.json
│ └── 2.json
└── j
├── 1.json
└── 2.json
```
```console
> SELECT . FROM c
{"id":2,"j_id":3}
{"foo":"bar","id":1,"j_id":1}
> SELECT id FROM c
{"c.id":2}
{"c.id":1}
> SELECT c.id, j.id, is_j FROM c LEFT JOIN j ON j.id == c.j_id
{"c.id":2,"is_j":null,"j.id":null}
{"c.id":1,"is_j":true,"j.id":1}
> SELECT c.id, j.id FROM c RIGHT JOIN j ON j.id == c.j_id
{"c.id":null,"j.id":2}
{"c.id":1,"j.id":1}
> SELECT c.id, j.id FROM c FULL JOIN j ON j.id == c.j_id
{"c.id":2,"j.id":null}
{"c.id":1,"j.id":1}
{"c.id":null,"j.id":2}
```
|