my table in netezza looks something like this:

```
b,2
b,1
a,2
a,1
a,3
c,1
c,2

```

I want to reorder it by the first coloumn so it looks like this: 

```
a,2
a,1
a,3
b,2
b,1
c,1
c,2

```

How do i reorder the table without creating a new one?