SQL & PL/SQL

Hi I am new to oracle and I'm trying to figure out how to get all possible combination of values in a column.

I have a table called ADJUSTMENT that contains the following data:

adj_id   adjustment_name         applied_order

1           adjustment1                  100

2           adjustment2                  200

3           adjustment3                  300

I have another table called ADJUSTMENT_GROUP that needs to contain all possible values from ADJUSTMENT (ordered by applied_order in the column).  The only possible values would be, separated by a ~.

grp_id   group_name

1           adjustment1

2           adjustment2

3           adjustment3

4           adjustment1~adjustment2

5           adjustment1~adjustment2~adjustment3

6           adjustment1~adjustment3

7           adjustment2~adjustment3

I also have a bridge table BRIDGE_ADJUSTMENT which will contains the following values:

grp_id   adj_id

1           1

2           2

3           3

4           1

4           2

5           1

5           2

5           3

6           1

6           3

7           2

7           3

How would I populate ADJUSTMENT_GROUP and BRIDGE_ADJUSTMENT using a query?  I have the data for the ADJUSTMENT table.  It contain more than 3 records but I provided 3 just for simplicity.

Any help would be greatly appreciated.  Thanks.