I have a question that I've thought in my head about using triggers, but
I figure to ask people that do SQL more than I.  So, I have a table that
I want two columns.

(1) A featured column which is for only 1 row, once it switched to
another row than all other rows must be false

             title              | author_id | categories | featured
--------------------------------+-----------+------+-----
 Thierry Beta Release           |         3 |         11 | True
 Different Approach  |         3 |         11 |
 Ottawa Does Not Heart Hip-Hop  |         3 |         11 |

(2) A featured column by category and only allow category_feature equal
to the number of categories.

Is SQL the way to go (and how - ideas), or should I use python for the
heavy lifting?

Thanks for any input,
J

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