In the pgsql tutorial two tables are created capitals inherits  cities.

When you do SELECT * FROM cities, you get both capitals and cities.  Is
there anyway to get get the name of the table so I could possibly know
the 'type' it was? Or should this be maintained as a separate column
'city_type' that has a value of 'capital'? 

Suppose I had another table river_cities and what I would want to be
able to is SELECT * FROM cities and know whether the city was a
river_city, capital, or nothing at all.

thanks,
--eric

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