diff --git a/02_activities/assignments/Cohort_8/ERD Diagram.drawio.png b/02_activities/assignments/Cohort_8/ERD Diagram.drawio.png new file mode 100644 index 000000000..acbfecb03 Binary files /dev/null and b/02_activities/assignments/Cohort_8/ERD Diagram.drawio.png differ diff --git a/02_activities/assignments/Cohort_8/assignment1.sql b/02_activities/assignments/Cohort_8/assignment1.sql index c992e3205..015c86fbd 100644 --- a/02_activities/assignments/Cohort_8/assignment1.sql +++ b/02_activities/assignments/Cohort_8/assignment1.sql @@ -4,17 +4,24 @@ --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 DESC -- z->a +LIMIT 10; -- only 10 rows --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), @@ -23,6 +30,12 @@ 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 >= 8 AND customer_id <= 10; + + +--AND customer_id -- returns nothing + -- option 2 @@ -34,19 +47,41 @@ filtered by customer IDs between 8 and 10 (inclusive) using either: Using the product table, write a query that outputs the product_id and product_name 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_qty_type = 'unit' THEN 'unit' + ELSE 'bulk' + END as prod_qty_type_condensed, +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 +v.vendor_name, +v.vendor_id, +vba.market_date, +vba.booth_number + +FROM vendor v + +INNER JOIN vendor_booth_assignments vba + ON v.vendor_id = vba.vendor_id + + ORDER BY v.vendor_name, vba.market_date ; @@ -56,7 +91,10 @@ 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(*) 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 @@ -64,7 +102,18 @@ 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_first_name, c.customer_last_name, c.customer_id +,SUM(cp.quantity*cp.cost_to_customer_per_qty) as total_cost + +FROM customer c + +INNER JOIN customer_purchases cp + ON cp.customer_id = c.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, c.customer_first_name ; --Temp Table /* 1. Insert the original vendor table into a temp.new_vendor and then add a 10th vendor: @@ -78,6 +127,15 @@ When inserting the new vendor, you need to appropriately align the columns to be VALUES(col1,col2,col3,col4,col5) */ +DROP TABLE IF EXISTS temp.new_vendor ; + +CREATE TABLE temp.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') ; +SELECT * FROM new_vendor ; + -- Date