diff --git a/02_activities/assignments/assignment1.sql b/02_activities/assignments/assignment1.sql index 2e89fa7af..b33c278b9 100644 --- a/02_activities/assignments/assignment1.sql +++ b/02_activities/assignments/assignment1.sql @@ -5,21 +5,31 @@ --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), filtered by vendor IDs between 8 and 10 (inclusive) using either: @@ -28,9 +38,17 @@ filtered by vendor IDs between 8 and 10 (inclusive) using either: */ -- 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 @@ -39,19 +57,35 @@ 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_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 +vendor.vendor_id, vendor_name, market_date, +FROM vendor +INNER JOIN vendor_booth_assignments + ON vendor.vendor_id = vendor_booth_assignments.vendor_id + +ORDER BY vendor_name, market_date; /* SECTION 3 */ @@ -60,7 +94,10 @@ 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(vendor_id) as num_times_rented +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 +105,18 @@ 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 +customer_purchases.customer_id, +customer.customer_first_name, +customer.customer_last_name, +SUM(quantity*cost_to_customer_per_qty) as total_cost + +FROM customer_purchases +INNER JOIN customer + ON customer_purchases.customer_id=customer.customer_id +GROUP BY customer_purchases.customer_id +HAVING total_cost > 2000 +ORDER BY customer_last_name, customer_first_name; --Temp Table @@ -82,7 +131,14 @@ 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 (vendor_id, vendor_name, vendor_type, vendor_owner_first_name, vendor_owner_last_name) +VALUES (10, "Thomas's 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. diff --git a/02_activities/data_model_assignment-one.drawio (1).png b/02_activities/data_model_assignment-one.drawio (1).png new file mode 100644 index 000000000..a6d7a2226 Binary files /dev/null and b/02_activities/data_model_assignment-one.drawio (1).png differ diff --git a/02_activities/data_model_assignment-one.drawio.png b/02_activities/data_model_assignment-one.drawio.png new file mode 100644 index 000000000..a6d7a2226 Binary files /dev/null and b/02_activities/data_model_assignment-one.drawio.png differ