diff --git a/11.sql b/11.sql index e69de29..5a66321 100644 --- a/11.sql +++ b/11.sql @@ -0,0 +1,28 @@ +-- write a SQL query to find the 10 least expensive players per hit in 2001. +-- Your query should return a table with three columns, one for the players’ first names, one of their last names, +-- and one called “dollars per hit”. +-- You can calculate the “dollars per hit” column by dividing a player’s 2001 salary by the number of hits they made +-- in 2001. Recall you can use AS to rename a column. +-- Dividing a salary by 0 hits will result in a NULL value. Avoid the issue by filtering out players with 0 hits. +-- Sort the table by the “dollars per hit” column, least to most expensive. If two players have the same “dollars per +-- hit”, order by first name, followed by last name, in alphabetical order. +-- As in 10.sql, ensure that the salary’s year and the performance’s year match. +-- You may assume, for simplicity, that a player will only have one salary and one performance in 2001. +SELECT + p."first_name", + p."last_name", + (s."salary" / perf."H") AS "dollar per hit" +FROM "players" AS p +JOIN "salaries" AS s + ON s."player_id" = p."id" +JOIN "performances" as perf + ON perf."player_id" = p."id" + AND perf."year" = s."year" +WHERE + s."year" = '2001' + AND perf."H" > 0 +ORDER BY + "dollars per hit" ASC, + p."first_name" ASC, + p."last_name" ASC +LIMIT 10;