I have a table with three columns: `A,B,C`. 

The values are: 

```
+---+-----+----+
| A |  B  | C  |
+---+-----+----+
| 1 | -10 |  5 |
| 1 |   0 |  5 |
| 1 |  10 |  5 |
| 2 |  10 | 12 |
| 2 |   0 | 12 |
| 3 | -10 | 14 |
| 4 |   0 |  8 |
| 4 |  10 |  8 |
| 5 |   0 |  6 |
| 5 |   1 |  6 |
| 5 |  -5 |  6 |
+---+-----+----+

```

If I first order the data by column `A`, then column `B`, then column `C` (although I did make all column `C` values the same per column `A` value) how would I select the "first row" per column `A`?

So, this should result in:

```
+---+-----+----+
| A |  B  | C  |
+---+-----+----+
| 1 | -10 |  5 |
| 2 |   0 | 12 |
| 3 | -10 | 14 |
| 4 |   0 |  8 |
| 5 |  -5 |  6 |
+---+-----+----+

```