Completed HW3: Intermediate SQL

Intermediate-SQL/hw3.sql

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+--
+-- Name: Nicholas Tamassia
+--
+-- Write your queries below each comment. Please use good style (one clause
+-- per line, JOIN syntax, indentation) and make sure all queries end with a
+-- semicolon. When necessary, limit the output to the first 200 results.
+--
+-- DO NOT MODIFY OR DELETE ANY OTHER LINES!
+--
+
+-- -----------------------------------------------------------------------------
+-- Connect to tpch database
+\c tpch
+-- -----------------------------------------------------------------------------
+
+--
+\echo
+\echo Query #1
+--
+-- Show the customer name, order date, and line items for order number 3.
+--
+-- Schema: c_name, o_orderdate, l_partkey, l_suppkey, l_quantity, l_extendedPrice
+--  Order: l_linenumber
+
+SELECT c_name, o_orderdate, l_partkey, l_suppkey, l_quantity, l_extendedPrice
+FROM customer
+JOIN orders ON c_custkey = o_custkey
+JOIN lineitem ON o_orderkey = l_orderkey
+WHERE o_orderkey = 3
+ORDER BY l_linenumber
+LIMIT 200;
+
+--
+\echo
+\echo Query #2
+--
+-- Show the part name, supply cost, and retail price of each line item.
+--
+-- Schema: l_orderkey, l_partkey, l_suppkey, p_name, ps_supplycost, p_retailprice
+--  Order: l_orderkey, l_linenumber
+
+SELECT l_orderkey, l_partkey, l_suppkey, p_name, ps_supplycost, p_retailprice
+FROM lineitem
+JOIN partsupp ON (l_partkey = ps_partkey AND l_suppkey = ps_suppkey)
+JOIN part ON ps_partkey = p_partkey
+ORDER BY l_orderkey, l_linenumber
+LIMIT 200;
+
+--
+\echo
+\echo Query #3
+--
+-- Which customers with an account balance over 5000 have no orders?
+--
+-- Schema: c_name, c_acctbal
+--  Order: c_custkey
+
+SELECT c_name, c_acctbal
+FROM customer
+LEFT JOIN orders ON c_custkey = o_custkey
+WHERE c_acctbal > 5000 AND o_orderkey is NULL
+ORDER BY c_custkey
+LIMIT 200;
+
+--
+\echo
+\echo Query #4
+--
+-- Which urgent priority orders have only one line item?
+--
+-- Schema: o_orderkey, o_custkey, o_orderstatus
+--  Order: o_orderkey
+
+SELECT o_orderkey, o_custkey, o_orderstatus
+FROM orders
+JOIN lineitem ON o_orderkey = l_orderkey
+WHERE o_orderpriority = '1-URGENT'
+GROUP BY o_orderkey
+HAVING COUNT(l_orderkey) = 1
+ORDER BY o_orderkey
+LIMIT 200;
+
+--
+\echo
+\echo Query #5
+--
+-- What parts containing the word "chocolate" were ordered on or after
+-- August 1, 1998 and shipped by mail?
+--
+-- Schema: p_name, ps_supplycost, l_quantity
+--  Order: p_partkey
+
+SELECT p_name, ps_supplycost, l_quantity
+FROM part
+JOIN partsupp ON p_partkey = ps_partkey
+JOIN lineitem ON (ps_partkey = l_partkey AND ps_suppkey = l_suppkey)
+JOIN orders ON l_orderkey = o_orderkey
+WHERE p_name LIKE '%chocolate%' AND o_orderdate >= '1998-08-01' AND l_shipmode = 'MAIL'
+ORDER BY p_partkey
+LIMIT 200;
+
+--
+\echo
+\echo Query #6
+--
+-- Get the min, max, and average supply cost of each part. The average supply cost
+-- must be rounded to 2 decimal places.
+--
+-- Schema: p_name, p_retailprice, min_supplycost, max_supplycost, avg_supplycost
+--  Order: p_partkey
+
+SELECT p_name, p_retailprice, MIN(ps_supplycost) AS "min_supplycost", MAX(ps_supplycost) AS "max_supplycost", ROUND(AVG(ps_supplycost), 2) as "avg_supplycost"
+FROM part
+JOIN partsupp on p_partkey = ps_partkey
+GROUP BY p_partkey
+ORDER BY p_partkey
+LIMIT 200;
+
+
+--
+\echo
+\echo Query #7
+--
+-- What suppliers have an inventory (total available quantity) of over 125,000
+-- parts with size over 40.
+--
+-- Schema: r_name, n_name, s_name, total_qty
+--  Order: r_name, n_name, s_name
+
+SELECT r_name, n_name, s_name, SUM(ps_availqty) AS "total_qty"
+FROM supplier
+JOIN partsupp ON s_suppkey = ps_suppkey
+JOIN part ON ps_partkey = p_partkey
+JOIN nation ON s_nationkey = n_nationkey
+JOIN region ON n_regionkey = r_regionkey
+WHERE p_size > 40
+GROUP BY s_name, n_name, r_name
+HAVING SUM(ps_availqty) > 125000
+ORDER BY r_name, n_name, s_name
+LIMIT 200;
+
+--
+\echo
+\echo Query #8
+--
+-- Find orders with a total profit of over $375,000. The profit of a single
+-- lineitem is defined as quantity * (retail price - supply cost). The profit
+-- of an order is the sum of its lineitem profits. For each order, show also
+-- the number of lineitems, the total quantity of items (rounded to 0 decimal
+-- places), and the total profit of the order (rounded to 2 decimal places).
+--
+-- Schema: l_orderkey, num_lineitems, total_quantity, total_profit
+--  Order: total_profit (descending), total_quantity
+
+SELECT l_orderkey, COUNT(l_quantity) AS "num_lineitems", ROUND(SUM(l_quantity)) AS "total_quantity", ROUND(SUM(l_quantity * (p_retailprice - ps_supplycost)), 2) AS "total_profit"
+FROM orders
+JOIN lineitem ON o_orderkey = l_orderkey
+JOIN partsupp ON (l_partkey = ps_partkey AND l_suppkey = ps_suppkey)
+JOIN part ON ps_partkey = p_partkey
+GROUP BY l_orderkey
+HAVING SUM(l_quantity * (p_retailprice - ps_supplycost)) > 375000
+ORDER BY "total_profit" DESC, "total_quantity"
+LIMIT 200;