diff --git a/02_activities/assignments/Assignment1_logical_model.jpg b/02_activities/assignments/Assignment1_logical_model.jpg new file mode 100644 index 000000000..9ba44490c Binary files /dev/null and b/02_activities/assignments/Assignment1_logical_model.jpg differ diff --git a/02_activities/assignments/assignment1.sql b/02_activities/assignments/assignment1.sql index 2e89fa7af..0965f0b24 100644 --- a/02_activities/assignments/assignment1.sql +++ b/02_activities/assignments/assignment1.sql @@ -5,20 +5,30 @@ --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 ASC, customer_first_name ASC +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; /*2. Write a query that returns all customer purchases and a new calculated column 'price' (quantity * cost_to_customer_per_qty), @@ -27,30 +37,56 @@ 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 >= 8 +AND vendor_id <=10; -- option 2 - +SELECT *, +quantity*cost_to_customer_per_qty AS price +FROM customer_purchases +WHERE vendor_id BETWEEN 8 AND 10; --CASE /* 1. Products can be sold by the individual unit or by bulk measures like lbs. or oz. 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 product_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 product_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 +INNER JOIN vendor_booth_assignments + ON vendor.vendor_id = vendor_booth_assignments.vendor_id +ORDER BY vendor_name ASC, market_date ASC; @@ -59,7 +95,10 @@ vendor_id field they both have in common, and sorts the result by vendor_name, t -- 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 +vendor_id, COUNT(vendor_id) AS num_rented +FROM vendor_booth_assignments +GROUP BY vendor_id; /* 2. The Farmer’s Market Customer Appreciation Committee wants to give a bumper @@ -68,7 +107,13 @@ 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 customer_first_name,customer_last_name, SUM(quantity*cost_to_customer_per_qty ) AS total_spent +FROM customer_purchases +INNER JOIN customer + ON customer_purchases.customer_id = customer.customer_id +GROUP BY customer_purchases.customer_id +HAVING total_spent >= 2000 +ORDER BY customer_last_name ASC, customer_first_name ASC; --Temp Table /* 1. Insert the original vendor table into a temp.new_vendor and then add a 10th vendor: @@ -82,6 +127,14 @@ 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 temp.new_vendor +VALUES (10, 'Thomass Superfood Store', 'Fresh Focused', 'Thomas', 'Rosenthal'); -- Date @@ -90,7 +143,10 @@ 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 +154,12 @@ 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; \ No newline at end of file