diff --git a/02_activities/assignments/Assignment 1 Section 1.pdf b/02_activities/assignments/Assignment 1 Section 1.pdf new file mode 100644 index 000000000..c4221fb13 Binary files /dev/null and b/02_activities/assignments/Assignment 1 Section 1.pdf differ diff --git a/02_activities/assignments/assignment1.sql b/02_activities/assignments/assignment1.sql index 2e89fa7af..fd2d5210d 100644 --- a/02_activities/assignments/assignment1.sql +++ b/02_activities/assignments/assignment1.sql @@ -4,21 +4,29 @@ --SELECT /* 1. Write a query that returns everything in the customer table. */ - +SELECT* +FROM customer /* 2. Write a query that displays all of the columns and 10 rows from the cus- tomer table, sorted by customer_last_name, then customer_first_ name. */ - +SELECT* +FROM customer +ORDER BY customer_last_name, customer_first_name +LIMIT 10 --WHERE /* 1. Write a query that returns all customer purchases of product IDs 4 and 9. */ -- option 1 - +SELECT* +FROM customer_purchases +WHERE product_id=4 OR product_id=9 -- option 2 - +SELECT * +FROM customer_purchases +WHERE product_id IN (4, 9) /*2. Write a query that returns all customer purchases and a new calculated column 'price' (quantity * cost_to_customer_per_qty), @@ -27,10 +35,14 @@ filtered by vendor IDs between 8 and 10 (inclusive) using either: 2. one condition using BETWEEN */ -- option 1 - +SELECT*, (quantity * cost_to_customer_per_qty) AS price +FROM customer_purchases +WHERE vendor_id BETWEEN 8 AND 10 -- option 2 - +SELECT*, (quantity * cost_to_customer_per_qty) AS price +FROM customer_purchases +WHERE vendor_id >= 8 AND vendor_id <= 10 --CASE @@ -39,19 +51,37 @@ Using the product table, write a query that outputs the product_id and product_n columns and add a column called prod_qty_type_condensed that displays the word “unit” if the product_qty_type is “unit,” and otherwise displays the word “bulk.” */ - +SELECT product_id, product_name, +CASE WHEN product_qty_type="lbs" + THEN "Unit" + ELSE "Bulk" + END AS prod_qty_type_condensed +FROM product /* 2. We want to flag all of the different types of pepper products that are sold at the market. add a column to the previous query called pepper_flag that outputs a 1 if the product_name contains the word “pepper” (regardless of capitalization), and otherwise outputs 0. */ - +SELECT product_id, product_name, product_qty_type, +CASE WHEN product_qty_type="lbs" + THEN "Unit" + ELSE "Bulk" + END AS prod_qty_type_condensed, +CASE WHEN product_name LIKE "%pepper%" + THEN 1 + ELSE 0 + END AS pepper_flag +FROM product --JOIN /* 1. Write a query that INNER JOINs the vendor table to the vendor_booth_assignments table on the vendor_id field they both have in common, and sorts the result by vendor_name, then market_date. */ - +SELECT* +FROM vendor v +INNER JOIN vendor_booth_assignments vba +ON v.vendor_id=vba.vendor_id +ORDER BY vendor_name, market_date /* SECTION 3 */ @@ -60,7 +90,9 @@ vendor_id field they both have in common, and sorts the result by vendor_name, t /* 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(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 @@ -68,6 +100,13 @@ 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_last_name, c.customer_first_name, SUM(quantity*cost_to_customer_per_qty) AS Spent +FROM customer_purchases cp +INNER JOIN customer c + ON cp.customer_id=c.customer_id +GROUP BY c.customer_last_name, c.customer_first_name +HAVING Spent>2000 +ORDER BY c.customer_last_name, c.customer_first_name --Temp Table @@ -82,7 +121,12 @@ When inserting the new vendor, you need to appropriately align the columns to be VALUES(col1,col2,col3,col4,col5) */ +CREATE TEMP TABLE new_vendor AS +SELECT * FROM vendor; + +INSERT INTO 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 /*1. Get the customer_id, month, and year (in separate columns) of every purchase in the customer_purchases table. @@ -90,7 +134,11 @@ 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! */ - +SELECT + customer_id, + strftime('%m', market_date) AS month, + strftime('%Y', market_date) AS year +FROM customer_purchases /* 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. @@ -98,3 +146,12 @@ 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!! */ +SELECT + customer_id, + strftime('%m', market_date) AS month, + strftime('%Y', market_date) AS year, + SUM(quantity * cost_to_customer_per_qty) AS total_spent +FROM customer_purchases +WHERE month = '04' + AND year = '2022' +GROUP BY customer_id;