sol: pset7/fiftyville

pset7/fiftyville/answers.txt

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+The THIEF is: Bruce
+The city the thief ESCAPED TO: New York City
+The ACCOMPLICE is: Robin

pset7/fiftyville/log.sql

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+-- Keep a log of any SQL queries you execute as you solve the mystery.
+-- Get the report based on the date and street
+-- NOTE:
+-- - 3 people witnessed the crime
+SELECT
+  *
+FROM
+  crime_scene_reports
+WHERE
+  street = 'Humphrey Street'
+  AND MONTH = '7'
+  AND DAY = '28';
+
+-- Get the statements from the 3 witnesses
+-- NOTE:
+-- - Ruth (161) saw a car leaving the bakery.
+--   - Check bakery_security_logs
+-- - Eugene (162) saw and recognized the perp. Perp withdraws money from Leggett Street ATM
+--   - Check atm_transactions
+-- - Raymond (163) overheard about buying the earliest flight on the day after the crime
+--   - Check flights
+SELECT
+  *
+FROM
+  interviews
+WHERE
+  YEAR = '2021'
+  AND MONTH = '7'
+  AND DAY = '28';
+
+-- Get list of suspects based on people that withdrew money from Leggett Street ATM
+SELECT
+  atm_transactions.account_number,
+  bank_accounts.person_id,
+  people.name,
+  people.phone_number,
+  people.passport_number,
+  people.license_plate
+FROM
+  atm_transactions
+  JOIN bank_accounts ON atm_transactions.account_number = bank_accounts.account_number
+  JOIN people ON bank_accounts.person_id = people.id
+WHERE
+  YEAR = '2021'
+  AND MONTH = '7'
+  AND DAY = '28'
+  AND atm_location = 'Leggett Street';
+
+-- Match the suspected license plates to corresponding car owner names
+SELECT
+  bakery_security_logs.license_plate,
+  people.name
+FROM
+  bakery_security_logs
+  JOIN people ON bakery_security_logs.license_plate = people.license_plate
+WHERE
+  bakery_security_logs.year = '2021'
+  AND bakery_security_logs.month = '7'
+  AND bakery_security_logs.day = '28'
+  AND bakery_security_logs.activity = 'exit'
+  AND bakery_security_logs.license_plate IN (
+    SELECT
+      people.license_plate
+    FROM
+      atm_transactions
+      JOIN bank_accounts ON atm_transactions.account_number = bank_accounts.account_number
+      JOIN people ON bank_accounts.person_id = people.id
+    WHERE
+      YEAR = '2021'
+      AND MONTH = '7'
+      AND DAY = '28'
+      AND atm_location = 'Leggett Street'
+  );
+
+-- Get which flight the perp will fly on
+-- NOTE:
+-- - Perp will take the 8AM flight to New York City on July 29, 2021
+-- - Flight ID 36
+SELECT
+  flights.id AS flight_id,
+  destination.city AS destination_city,
+  flights.hour AS time_of_flight
+FROM
+  flights
+  JOIN airports AS origin ON origin.id = flights.origin_airport_id
+  JOIN airports AS destination ON destination.id = flights.destination_airport_id
+WHERE
+  YEAR = '2021'
+  AND MONTH = '7'
+  AND DAY = '29'
+ORDER BY
+  flights.hour;
+
+-- Get passengers for flight id 36
+-- NOTE:
+-- - Narrowed down to Bruce, Taylor, Kenny, Luca
+SELECT
+  passengers.passport_number,
+  people.name
+FROM
+  passengers
+  JOIN people ON passengers.passport_number = people.passport_number
+WHERE
+  flight_id = '36'
+  AND passengers.passport_number IN (
+    SELECT
+      people.passport_number
+    FROM
+      atm_transactions
+      JOIN bank_accounts ON atm_transactions.account_number = bank_accounts.account_number
+      JOIN people ON bank_accounts.person_id = people.id
+    WHERE
+      YEAR = '2021'
+      AND MONTH = '7'
+      AND DAY = '28'
+      AND atm_location = 'Leggett Street'
+  );
+
+-- Match phone_call records on time (less than a minute) of incident to corresponding names
+-- NOTE
+-- - Narrowed to Bruce (accompliced by Robin)
+-- - Narrowed to Taylor (accompliced by James)
+SELECT
+  phone_calls.caller,
+  p_caller.name,
+  phone_calls.receiver,
+  p_receiver.name,
+  phone_calls.duration
+FROM
+  phone_calls
+  JOIN people AS p_caller ON phone_calls.caller = p_caller.phone_number
+  JOIN people AS p_receiver ON phone_calls.receiver = p_receiver.phone_number
+WHERE
+  phone_calls.year = '2021'
+  AND phone_calls.month = '7'
+  AND phone_calls.day = '28'
+  AND phone_calls.duration < 60
+  AND phone_calls.caller IN (
+    SELECT
+      people.phone_number
+    FROM
+      atm_transactions
+      JOIN bank_accounts ON atm_transactions.account_number = bank_accounts.account_number
+      JOIN people ON bank_accounts.person_id = people.id
+    WHERE
+      YEAR = '2021'
+      AND MONTH = '7'
+      AND DAY = '28'
+      AND atm_location = 'Leggett Street'
+  );
+
+-- Match phone_call records on time of incident to corresponding names
+SELECT
+  phone_calls.caller,
+  p_caller.name,
+  phone_calls.receiver,
+  p_receiver.name,
+  phone_calls.duration
+FROM
+  phone_calls
+  JOIN people AS p_caller ON phone_calls.caller = p_caller.phone_number
+  JOIN people AS p_receiver ON phone_calls.receiver = p_receiver.phone_number
+WHERE
+  phone_calls.year = '2021'
+  AND phone_calls.month = '7'
+  AND phone_calls.day = '28'
+  AND phone_calls.caller IN (
+    SELECT
+      people.phone_number
+    FROM
+      atm_transactions
+      JOIN bank_accounts ON atm_transactions.account_number = bank_accounts.account_number
+      JOIN people ON bank_accounts.person_id = people.id
+    WHERE
+      YEAR = '2021'
+      AND MONTH = '7'
+      AND DAY = '28'
+      AND atm_location = 'Leggett Street'
+  );
+
+-- Match passengers to corresponding names
+SELECT
+  phone_calls.caller,
+  people.name
+FROM
+  phone_calls
+  JOIN people ON phone_calls.caller = people.phone_number
+WHERE
+  phone_calls.year = '2021'
+  AND phone_calls.month = '7'
+  AND phone_calls.day = '28'
+  AND phone_calls.caller IN (
+    SELECT
+      people.phone_number
+    FROM
+      atm_transactions
+      JOIN bank_accounts ON atm_transactions.account_number = bank_accounts.account_number
+      JOIN people ON bank_accounts.person_id = people.id
+    WHERE
+      YEAR = '2021'
+      AND MONTH = '7'
+      AND DAY = '28'
+      AND atm_location = 'Leggett Street'
+  );