postgis - Querying points inside and outside of polygons?

In PostGIS I have two tables:

Table that contains polygons:

table a.provinces


gid | geom       |   name    |
------------------------------
1   | 010604 ... | Champagne |

Table that contains points:

table a.stations

gid | geom     | province_short |
---------------------------------
1   | 0132 ... | ch             |

They are not connected with foreign key!

I would like to get:

1. Only points that are inside of the polygon


2. Only points that are outside of the polygon

SRID: 3857

Something like this:

Can it be done just like this or I have to modify database?