From af01cefb97c09c1d3d7ab0a33897407429064373 Mon Sep 17 00:00:00 2001
From: TinaToronto <tina_lin_1818@live.com>
Date: Tue, 17 Sep 2024 23:50:36 -0400
Subject: [PATCH] Complete homework3 (homework_3.sql)

---
 02_activities/homework/homework_3.sql | 43 ++++++++++++++++++++++++++-
 1 file changed, 42 insertions(+), 1 deletion(-)

diff --git a/02_activities/homework/homework_3.sql b/02_activities/homework/homework_3.sql
index 3fe2589a2..b3ea3ff50 100644
--- a/02_activities/homework/homework_3.sql
+++ b/02_activities/homework/homework_3.sql
@@ -2,7 +2,10 @@
 /* 1. Write a query that determines how many times each vendor has rented a booth 
 at the farmer’s market by counting the vendor booth assignments per vendor_id. */
 
-
+Answer: 
+SELECT vendor_id, count(vendor_id)
+FROM vendor_booth_assignments
+GROUP BY vendor_id
 
 /* 2. The Farmer’s Market Customer Appreciation Committee wants to give a bumper 
 sticker to everyone who has ever spent more than $2000 at the market. Write a query that generates a list 
@@ -10,6 +13,16 @@ of customers for them to give stickers to, sorted by last name, then first name.
 
 HINT: This query requires you to join two tables, use an aggregate function, and use the HAVING keyword. */
 
+Answer: 
+SELECT c.customer_first_name, 
+c.customer_last_name,
+SUM(cp.quantity * cp.cost_to_customer_per_qty) AS total_spent
+FROM customer c
+JOIN customer_purchases cp
+ON c.customer_id = cp.customer_id
+GROUP BY c.customer_id, c.customer_first_name, c.customer_last_name
+HAVING SUM(cp.quantity * cp.cost_to_customer_per_qty) > 2000
+ORDER BY c.customer_last_name ASC, c.customer_first_name ASC
 
 
 --Temp Table
@@ -24,6 +37,16 @@ When inserting the new vendor, you need to appropriately align the columns to be
 VALUES(col1,col2,col3,col4,col5) 
 */
 
+Answer: 
+DROP TABLE IF EXISTS new_vendor;
+
+CREATE TEMP TABLE new_vendor AS
+
+SELECT *
+FROM vendor;
+
+INSERT INTO temp.new_vendor (vendor_id, vendor_name, vendor_type, vendor_owner_first_name, vendor_owner_last_name)
+VALUES (10, 'Thomass Superfood Store', 'Fresh Focused', 'Thomas', 'Rosenthal');
 
 
 -- Date
@@ -32,9 +55,27 @@ VALUES(col1,col2,col3,col4,col5)
 HINT: you might need to search for strfrtime modifers sqlite on the web to know what the modifers for month 
 and year are! */
 
+Answer:
+SELECT customer_id, 
+       strftime('%m', market_date) AS month, 
+       strftime('%Y', market_date) AS year
+FROM customer_purchases;
+
+I assume that the column of 'market_date' is the date of every purchase.
+
+
 /* 2. Using the previous query as a base, determine how much money each customer spent in April 2022. 
 Remember that money spent is quantity*cost_to_customer_per_qty. 
 
 HINTS: you will need to AGGREGATE, GROUP BY, and filter...
 but remember, STRFTIME returns a STRING for your WHERE statement!! */
 
+Answer:
+
+SELECT customer_id, 
+       SUM(quantity * cost_to_customer_per_qty) AS total_spent
+FROM customer_purchases
+WHERE strftime('%m', market_date) = '04'
+  AND strftime('%Y', market_date) = '2022'
+GROUP BY customer_id;
+