11. Actors' last name

easy

Instruction

Find the number of actors whose last name is one of the following: 'DAVIS', 'BRODY', 'ALLEN', 'BERRY'

Table: actor

  col_name   | col_type
-------------+--------------------------
 actor_id    | integer
 first_name  | text
 last_name   | text

Sample results

last_name | count
-----------+-------
 ALLEN     |     3
 DAVIS     |     3

Expected results

Solution postgres

SELECT
  last_name,
  COUNT(*)
FROM actor
WHERE last_name IN ('DAVIS', 'BRODY', 'ALLEN', 'BERRY')
GROUP BY last_name;
    

Explanation

This query is selecting data from the "actor" table in a Postgres database. It is selecting the "last_name" column and counting the number of occurrences of each last name for actors with the last names 'DAVIS', 'BRODY', 'ALLEN', or 'BERRY'. The "GROUP BY" clause is used to group the results by the last name column. This query is useful for analyzing the popularity or frequency of certain last names within the actors in the database.



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