daviddoji-cs50/problems/2024/sql/moneyball@20260428T144224.408356905Z

11.sql

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+-- 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;