diff --git a/02_activities/assignments/assignment1.sql b/02_activities/assignments/assignment1.sql index 2e89fa7af..380cf790c 100644 --- a/02_activities/assignments/assignment1.sql +++ b/02_activities/assignments/assignment1.sql @@ -4,20 +4,25 @@ --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 IN (4,9) -- option 2 +SELECT * FROM customer_purchases +WHERE product_id = 4 OR product_id = 9; @@ -27,10 +32,14 @@ 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 <=10 AND vendor_id >=8 -- option 2 - +SELECT *, quantity * cost_to_customer_per_qty as price +FROM customer_purchases +WHERE vendor_id BETWEEN 8 AND 10 --CASE @@ -39,19 +48,38 @@ 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, product_qty_type, + CASE + WHEN product_qty_type = 'unit' 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 = 'unit' THEN 'unit' + ELSE 'bulk' + END AS prod_qty_type_condensed, +product_name, + CASE + WHEN lower(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 as v +INNER JOIN vendor_booth_assignments as vba +ON v.vendor_id = vba.vendor_id +ORDER BY vendor_name, market_date /* SECTION 3 */ @@ -60,7 +88,9 @@ 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(booth_number) as total_booth_assignments +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 $2000 at the market. Write a query that generates a list @@ -68,6 +98,14 @@ of customers for them to give stickers to, sorted by last name, then first name. HINT: This query requires you to join two tables, use an aggregate function, and use the HAVING keyword. */ +SELECT customer_last_name, customer_first_name, +'$' || ROUND(SUM(cp.quantity * cp.cost_to_customer_per_qty),2) AS total_purchases +FROM customer AS c +LEFT JOIN customer_purchases AS cp +ON c.customer_id = cp.customer_id +GROUP BY c.customer_id +HAVING total_purchases > 2000 +ORDER BY c.customer_last_name, c.customer_first_name --Temp Table @@ -82,14 +120,31 @@ When inserting the new vendor, you need to appropriately align the columns to be VALUES(col1,col2,col3,col4,col5) */ - +CREATE TEMP TABLE temp.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 /*1. Get the customer_id, month, and year (in separate columns) of every purchase in the customer_purchases table. 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. @@ -98,3 +153,7 @@ 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, '$' || ROUND(SUM(quantity * cost_to_customer_per_qty),2) AS total_purchases +FROM customer_purchases +WHERE strftime('%m', market_date) = '04' AND strftime('%Y', market_date) = '2022' +GROUP BY customer_id \ No newline at end of file diff --git a/02_activities/assignments/sql_assignment_one.pdf b/02_activities/assignments/sql_assignment_one.pdf new file mode 100644 index 000000000..abdfeedd4 Binary files /dev/null and b/02_activities/assignments/sql_assignment_one.pdf differ