-- write a SQL query to find the 5 lowest paying teams (by average salary) in 2001.
--     Round the average salary column to two decimal places and call it “average salary”.
--     Sort the teams by average salary, least to greatest.
--     Your query should return a table with two columns, one for the teams’ names and one for their average salary.
SELECT
    t."name",
    ROUND(AVG(s."salary"), 2) AS "average salary"
FROM "teams" AS t
JOIN "salaries" AS s
    ON s."team_id" = t."id"
WHERE s."year" = '2001'
GROUP BY t."id", t."name"
ORDER BY "average salary" ASC
LIMIT 5;