I have the following three queries

```
SELECT COUNT(*) as cached_type_a, DATE(datetime) as datetime
    FROM requests
    WHERE cached = 'a'
    GROUP BY DAY(datetime);

SELECT COUNT(*) as cached_type_b, DATE(datetime) as datetime
    FROM requests
    WHERE cached = 'b'
    GROUP BY DAY(datetime);

SELECT COUNT(*) as cached_type_c, DATE(datetime) as datetime
    FROM requests
    WHERE cached = 'c'
    GROUP BY DAY(datetime);

```

Is it possible to combine them into a single query with 4 columns

`cached_type_a`, `cached_type_b`, `cached_type_c`, `datetime`?