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