From 28ebaeaf0b67b150d64467db29f4a14b7df0d062 Mon Sep 17 00:00:00 2001
From: bot50 <bot@cs50.harvard.edu>
Date: Tue, 28 Apr 2026 13:10:07 +0000
Subject: [PATCH] 
 daviddoji-cs50/problems/2024/sql/moneyball@20260428T131007.657783175Z

---
 1.sql  |  8 ++++++++
 10.sql |  0
 11.sql |  0
 12.sql |  0
 2.sql  |  9 +++++++++
 3.sql  | 15 +++++++++++++++
 4.sql  |  0
 5.sql  |  0
 6.sql  |  0
 7.sql  |  0
 8.sql  |  0
 9.sql  |  0
 12 files changed, 32 insertions(+)
 create mode 100644 1.sql
 create mode 100644 10.sql
 create mode 100644 11.sql
 create mode 100644 12.sql
 create mode 100644 2.sql
 create mode 100644 3.sql
 create mode 100644 4.sql
 create mode 100644 5.sql
 create mode 100644 6.sql
 create mode 100644 7.sql
 create mode 100644 8.sql
 create mode 100644 9.sql

diff --git a/1.sql b/1.sql
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--- /dev/null
+++ b/1.sql
@@ -0,0 +1,8 @@
+-- write a SQL query to find the average player salary by year.
+--     Sort by year in descending order.
+--     Round the salary to two decimal places and call the column “average salary”.
+--     Your query should return a table with two columns, one for year and one for average salary.
+SELECT "year", ROUND(AVG("salary"), 2) AS "average salary"
+FROM "salaries"
+GROUP BY "year"
+ORDER BY "year" DESC;
diff --git a/10.sql b/10.sql
new file mode 100644
index 0000000..e69de29
diff --git a/11.sql b/11.sql
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index 0000000..e69de29
diff --git a/12.sql b/12.sql
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index 0000000..e69de29
diff --git a/2.sql b/2.sql
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--- /dev/null
+++ b/2.sql
@@ -0,0 +1,9 @@
+-- write a SQL query to find Cal Ripken Jr.’s salary history.
+--     Sort by year in descending order.
+--     Your query should return a table with two columns, one for year and one for salary.
+SELECT s."year", s."salary"
+FROM "salaries" AS s
+JOIN "players" AS p
+    ON s."player_id" = p."id"
+WHERE p."first_name" = "Cal" AND p."last_name" LIKE "Ripken%"
+ORDER BY "year" DESC;
diff --git a/3.sql b/3.sql
new file mode 100644
index 0000000..b84b33e
--- /dev/null
+++ b/3.sql
@@ -0,0 +1,15 @@
+-- write a SQL query to find Ken Griffey Jr.’s home run history.
+--     Sort by year in descending order.
+--     Note that there may be two players with the name “Ken Griffey.” This Ken Griffey was born in 1969.
+--     Your query should return a table with two columns, one for year and one for home runs.
+SELECT perf."year", perf."hr"
+FROM "performances" as perf
+JOIN "players" AS p
+    ON perf."player_id" = p."id"
+WHERE
+    p."first_name" = "Ken"
+    AND
+    p."last_name" LIKE "Griffey%"
+    AND
+    p."birth_year" = "1969"
+ORDER BY "year" DESC;
diff --git a/4.sql b/4.sql
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diff --git a/5.sql b/5.sql
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index 0000000..e69de29
diff --git a/6.sql b/6.sql
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diff --git a/7.sql b/7.sql
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diff --git a/8.sql b/8.sql
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diff --git a/9.sql b/9.sql
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index 0000000..e69de29