diff --git a/02_activities/assignments/assignment1.sql b/02_activities/assignments/assignment1.sql index 2e89fa7af..530fb6ba8 100644 --- a/02_activities/assignments/assignment1.sql +++ b/02_activities/assignments/assignment1.sql @@ -4,22 +4,27 @@ --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 = 4 OR product_id = 9; -- option 2 - - +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), filtered by vendor IDs between 8 and 10 (inclusive) using either: @@ -27,10 +32,14 @@ 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 +47,40 @@ 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.” */ - - - -/* 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" +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 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.vendor_name, + vendor_booth_assignments.market_date +FROM vendor +INNER JOIN vendor_booth_assignments + ON vendor.vendor_id = vendor_booth_assignments.vendor_id +ORDER BY vendor.vendor_name, vendor_booth_assignments.market_date; +--vendor.market_date = vendor_booth_assignments.market_date; @@ -59,7 +89,10 @@ 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 times +FROM vendor_booth_assignments +GROUP BY vendor_id; /* 2. The Farmer’s Market Customer Appreciation Committee wants to give a bumper @@ -67,7 +100,17 @@ 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 +customer.customer_first_name, +customer.customer_last_name, +customer.customer_id, +SUM(quantity*cost_to_customer_per_qty) as total_cost +FROM customer_purchases +INNER JOIN customer +ON customer.customer_id = customer_purchases.customer_id +GROUP BY customer.customer_id, customer.customer_last_name, customer.customer_first_name +HAVING total_cost > 2000 +ORDER BY customer.customer_last_name, customer.customer_first_name; --Temp Table @@ -81,6 +124,11 @@ 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', 'a Fresh Focused store', 'Thomas', 'Rosenthal'); @@ -96,5 +144,4 @@ and year are! */ 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!! */ - +but remember, STRFTIME returns a STRING for your WHERE statement!! */ \ No newline at end of file