diff --git a/02_activities/assignments/Cohort_8/Entity Relationship Diagram.pdf b/02_activities/assignments/Cohort_8/Entity Relationship Diagram.pdf new file mode 100644 index 000000000..96c3c8ada Binary files /dev/null and b/02_activities/assignments/Cohort_8/Entity Relationship Diagram.pdf differ diff --git a/02_activities/assignments/Cohort_8/assignment1.sql b/02_activities/assignments/Cohort_8/assignment1.sql index c992e3205..d51a6c0db 100644 --- a/02_activities/assignments/Cohort_8/assignment1.sql +++ b/02_activities/assignments/Cohort_8/assignment1.sql @@ -4,17 +4,21 @@ --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. */ - +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), @@ -23,10 +27,16 @@ filtered by customer 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 customer_id >7 AND customer_id <10; -- option 2 - +SELECT * , + quantity * cost_to_customer_per_qty as price +FROM customer_purchases +WHERE customer_id BETWEEN 8 and 10; --CASE @@ -35,27 +45,58 @@ 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 = '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, +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 +v.vendor_name, +v.vendor_id, +v.vendor_type, +vba.booth_number, +vba.market_date + +FROM vendor as v +inner JOIN vendor_booth_assignments as vba +WHERE v.vendor_id = vba.vendor_id +ORDER by vendor_name, market_date; /* SECTION 3 */ -- AGGREGATE /* 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 +v.vendor_name, +v.vendor_id, +COUNT(*) AS booth_assignments +FROM vendor v +JOIN vendor_booth_assignments vba + ON v.vendor_id = vba.vendor_id +GROUP BY v.vendor_id, v.vendor_name +ORDER BY booth_assignments DESC, v.vendor_name; /* 2. The Farmer’s Market Customer Appreciation Committee wants to give a bumper @@ -64,7 +105,17 @@ 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, +round (SUM(cp.quantity * cp.cost_to_customer_per_qty),2) AS total_spent +FROM customer c +JOIN customer_purchases cp + on c.customer_id = cp.customer_id +GROUP by c.customer_id, c.customer_last_name, c.customer_first_name +HAVING sum(cp.quantity * cp.cost_to_customer_per_qty) > 2000 +ORDER by c.customer_last_name, c.customer_first_name; --Temp Table /* 1. Insert the original vendor table into a temp.new_vendor and then add a 10th vendor: @@ -77,8 +128,19 @@ 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) */ - - +DROP TABLE IF EXISTS temp.new_vendor; +CREATE TABLE temp.new_vendor AS +SELECT vendor_id, + vendor_name, + vendor_type, + vendor_owner_first_name, + vendor_owner_last_name +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. @@ -93,4 +155,3 @@ 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!! */ -