# Remove Data Connections
We currently have a `team` table:
| id | name | headquarters |
| 1 | Preventers | Sharp Tower |
| 2 | Z-Force | Sister Margaretβs Bar |
And a `hero` table:
| id | name | secret_name | age | team_id |
| 1 | Deadpond | Dive Wilson | null | 2 |
| 2 | Rusty-Man | Tommy Sharp | 48 | 1 |
| 3 | Spider-Boy | Pedro Parqueador | null | 1 |
Let's see how to **remove** connections between rows in tables.
We will continue with the code from the previous chapter.
π Full file preview
```Python
{!./docs_src/tutorial/connect/update/tutorial001.py!}
```
## Break a Connection
We don't really have to delete anything to break a connection. We can just assign `None` to the foreign key, in this case, to the `team_id`.
Let's say **Spider-Boy** is tired of the lack of friendly neighbors and wants to get out of the **Preventers**.
We can simply set the `team_id` to `None`, and now it doesn't have a connection with the team:
```Python hl_lines="8"
# Code above omitted π
{!./docs_src/tutorial/connect/delete/tutorial001.py[ln:31-32]!}
# Previous code here omitted π
{!./docs_src/tutorial/connect/delete/tutorial001.py[ln:68-72]!}
# Code below omitted π
```
π Full file preview
```Python
{!./docs_src/tutorial/connect/delete/tutorial001.py!}
```
Again, we just **assign** a value to that field attribute `team_id`, now the value is `None`, which means `NULL` in the database. Then we `add()` the hero to the session, and then `commit()`.
Next we `refresh()` it to get the recent data, and we print it.
Running that in the command line will output:
```console
$ python app.py
// Previous output omitted π
// Update the hero
INFO Engine UPDATE hero SET team_id=? WHERE hero.id = ?
INFO Engine [cached since 0.07753s ago] (None, 3)
// Commit the session
INFO Engine COMMIT
// Automatically start a new transaction
INFO Engine BEGIN (implicit)
// Refresh the hero
INFO Engine SELECT hero.id, hero.name, hero.secret_name, hero.age, hero.team_id
FROM hero
WHERE hero.id = ?
INFO Engine [cached since 0.1661s ago] (3,)
// Print the hero without a team
No longer Preventer: id=3 secret_name='Pedro Parqueador' team_id=None name='Spider-Boy' age=None
```
That's it, we now removed a connection between rows in different tables by unsetting the foreign key column. π₯