diff --git a/02_activities/assignments/Assignment 1 - Section 1 drawio.png b/02_activities/assignments/Assignment 1 - Section 1 drawio.png new file mode 100644 index 000000000..4f0a027fc Binary files /dev/null and b/02_activities/assignments/Assignment 1 - Section 1 drawio.png differ diff --git a/02_activities/assignments/assignment1.sql b/02_activities/assignments/assignment1.sql index 2e89fa7af..db6d98d0f 100644 --- a/02_activities/assignments/assignment1.sql +++ b/02_activities/assignments/assignment1.sql @@ -4,21 +4,30 @@ --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 + ,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; /*2. Write a query that returns all customer purchases and a new calculated column 'price' (quantity * cost_to_customer_per_qty), @@ -27,10 +36,18 @@ 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 @@ -38,19 +55,44 @@ filtered by vendor 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 UPPER(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.* + ,vba.booth_number + ,vba.market_date +FROM vendor v +INNER JOIN vendor_booth_assignments vba + ON v.vendor_id = vba.vendor_id +ORDER BY vendor_name + ,market_date; @@ -59,7 +101,14 @@ 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 v.vendor_name + ,COUNT(vba.market_date) +FROM vendor v +INNER JOIN vendor_booth_assignments vba + ON v.vendor_id = vba.vendor_id +GROUP BY v.vendor_name +ORDER BY vendor_name + ,market_date; /* 2. The Farmer’s Market Customer Appreciation Committee wants to give a bumper @@ -67,7 +116,16 @@ sticker to everyone who has ever spent more than $2000 at the market. Write a qu 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 + ,SUM(quantity * cost_to_customer_per_qty) AS 'money_spent' +FROM customer c +INNER JOIN customer_purchases cp + ON c.customer_id = cp.customer_id +GROUP BY c.customer_last_name, c.customer_first_name +HAVING money_spent > 2000 +ORDER BY c.customer_last_name, c.customer_first_name; --Temp Table @@ -81,7 +139,18 @@ 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 * +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'); + +SELECT * +FROM temp.new_vendor; -- Date @@ -89,7 +158,10 @@ 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 'purchase_month' + ,strftime('%Y', market_date) AS 'purchase_year' +FROM customer_purchases; /* 2. Using the previous query as a base, determine how much money each customer spent in April 2022. @@ -97,4 +169,9 @@ 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 + ,SUM(quantity * cost_to_customer_per_qty) AS 'money_spent' +FROM customer_purchases +WHERE strftime('%m', market_date) = '04' + AND strftime('%Y', market_date) = '2022' +GROUP BY customer_id;