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19 changes: 19 additions & 0 deletions 02_activities/homework/homework_3.sql
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Original file line number Diff line number Diff line change
Expand Up @@ -2,13 +2,22 @@
/* 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. */

SELECT vendor_id, COUNT(*) AS booth_rentals
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
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. */
SELECT c.customer_id, c.customer_last_name, c.customer_first_name, SUM(p.quantity * p.cost_to_customer_per_qty) AS total_spent
FROM customer c
INNER JOIN customer_purchases p ON c.customer_id = p.customer_id
GROUP BY c.customer_id, c.customer_last_name, c.customer_first_name
HAVING total_spent > 2000
ORDER BY c.customer_last_name, c.customer_first_name;



Expand All @@ -23,6 +32,9 @@ When inserting the new vendor, you need to appropriately align the columns to be
-> To insert the new row use VALUES, specifying the value you want for each column:
VALUES(col1,col2,col3,col4,col5)
*/
CREATE TEMPORARY TABLE new_vendor AS
SELECT *
FROM vendor;



Expand All @@ -32,9 +44,16 @@ 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! */

CREATE TEMPORARY TABLE new_vendor AS
SELECT *
FROM vendor;


/* 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!! */
INSERT INTO new_vendor (vendor_id, vendor_name, vendor_type, vendor_owner_last_name, vendor_owner_first_name)
VALUES (10, 'Thomass Superfood Store', 'Fresh Focused', 'Rosenthal', 'Thomas');