Instruction
- Write a query to return all actors and customers whose first names ends in 'D'.
- Return their ids (for actor: use
actor_id, customer:customer_id),first_nameandlast_name. - The order of your results doesn't matter.
Table 1: actor
col_name | col_type -------------+-------------------------- actor_id | integer first_name | text last_name | text
Table 2: customer
col_name | col_type -------------+-------------------------- customer_id | integer store_id | smallint first_name | text last_name | text email | text address_id | smallint activebool | boolean create_date | date active | integer
Sample results
customer_id | first_name | last_name
-------------+------------+--------------
55 | DORIS | REED
65 | ROSE | HOWARD
Solution postgres
SELECT customer_id, first_name, last_name
FROM customer
WHERE first_name LIKE '%D'
UNION
SELECT actor_id, first_name, last_name
FROM actor
WHERE first_name LIKE '%D';
Explanation
This query is selecting customer_id, first_name, and last_name from the "customer" table where the first name ends with the letter 'D'. It then combines this with the actor_id, first_name, and last_name from the "actor" table where the first name also ends with the letter 'D'. The UNION keyword is used to merge the results of both SELECT statements into a single table. This query can be used to find all customers and actors whose first name ends with the letter 'D'.
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