diff --git a/02_activities/assignments/Microcredential_Cohort/Assignment1part1.png b/02_activities/assignments/Microcredential_Cohort/Assignment1part1.png new file mode 100644 index 000000000..e07b685e7 Binary files /dev/null and b/02_activities/assignments/Microcredential_Cohort/Assignment1part1.png differ diff --git a/02_activities/assignments/Microcredential_Cohort/assignment1.sql b/02_activities/assignments/Microcredential_Cohort/assignment1.sql index 2ec561e2a..bde35a9db 100644 --- a/02_activities/assignments/Microcredential_Cohort/assignment1.sql +++ b/02_activities/assignments/Microcredential_Cohort/assignment1.sql @@ -6,10 +6,7 @@ --SELECT /* 1. Write a query that returns everything in the customer table. */ --QUERY 1 - - - - +SELECT * FROM customer; --END QUERY @@ -17,8 +14,18 @@ sorted by customer_last_name, then customer_first_ name. */ --QUERY 2 - - +SELECT * +FROM customer +ORDER BY customer_first_name ASC, customer_last_name ASC +LIMIT 10; + +-- QUALITY CHECKING: trying the DESC version to see if organizes names from Z to A +/* +SELECT * +FROM customer +ORDER BY customer_first_name DESC, customer_last_name DESC +LIMIT 10 +*/ --END QUERY @@ -26,11 +33,11 @@ sorted by customer_last_name, then customer_first_ name. */ --WHERE /* 1. Write a query that returns all customer purchases of product IDs 4 and 9. Limit to 25 rows of output. */ ---QUERY 3 - - - +--QUERY 3 +SELECT * FROM customer_purchases +WHERE product_id == 1 +OR product_id == 4; --END QUERY @@ -42,10 +49,20 @@ filtered by customer IDs between 8 and 10 (inclusive) using either: Limit to 25 rows of output. */ --QUERY 4 - - - - +SELECT * +,(quantity* cost_to_customer_per_qty) as price +FROM customer_purchases +WHERE customer_id BETWEEN 8 AND 10 +LIMIT 25; + +/* CAN ALSO BE WRITTEN AS: +SELECT * +,(quantity* cost_to_customer_per_qty) as price +FROM customer_purchases +WHERE customer_id > 7 +AND customer_id < 11 +LIMIT 25; +*/ --END QUERY @@ -55,10 +72,13 @@ 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.” */ --QUERY 5 - - - - +SELECT product_id, product_name, prod_qty_type_condensed +FROM ( +SELECT product_id, product_name, product_qty_type +,CASE WHEN product_qty_type= 'unit' THEN 'unit' +ELSE 'bulk' END as prod_qty_type_condensed +FROM product +); --END QUERY @@ -67,8 +87,16 @@ add a column to the previous query called pepper_flag that outputs a 1 if the pr contains the word “pepper” (regardless of capitalization), and otherwise outputs 0. */ --QUERY 6 +SELECT product_id, product_name, pepper_flag, prod_qty_type_condensed +FROM ( +SELECT product_id, product_name, product_qty_type -- THESE ARE THE COLUMNS NEEDED +,CASE WHEN product_qty_type= 'unit' THEN 'unit' +ELSE 'bulk' END AS prod_qty_type_condensed - +, CASE WHEN product_name LIKE '%pepper%' THEN 1 -- LIKE MEANS TEXT IS SEARCHED FOR PEPPER REGARDLESS OF CAPITALIZATION +ELSE 0 END AS pepper_flag +FROM product +); --END QUERY @@ -78,14 +106,15 @@ contains the word “pepper” (regardless of capitalization), and otherwise out vendor_id field they both have in common, and sorts the result by market_date, then vendor_name. Limit to 24 rows of output. */ --QUERY 7 - - - - +SELECT vendor.vendor_id, vendor_name, vendor_type, vendor_owner_first_name, vendor_owner_last_name, -- originating from vendor table +vendor_booth_assignments.vendor_id, booth_number, market_date -- originating from vendor booth assignments +FROM vendor +INNER JOIN vendor_booth_assignments + ON vendor.vendor_id = vendor_booth_assignments.vendor_id +ORDER BY market_date ASC, vendor_name ASC; --END QUERY - /* SECTION 3 */ -- AGGREGATE @@ -93,22 +122,34 @@ Limit to 24 rows of output. */ at the farmer’s market by counting the vendor booth assignments per vendor_id. */ --QUERY 8 +-- This version only lists the vendor id +SELECT vendor_id, COUNT(booth_number) as Num_times_rented +FROM vendor_booth_assignments +GROUP BY vendor_id; - +-- This version lists the vendor id and the corresponding name +SELECT COUNT(booth_number) as Num_times_rented, vendor.vendor_id, vendor.vendor_name +FROM vendor +INNER JOIN vendor_booth_assignments -- inner join returns values on vendor_id that are matching in both tables + ON vendor.vendor_id = vendor_booth_assignments.vendor_id +GROUP BY vendor.vendor_id; --END QUERY - /* 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 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. */ --QUERY 9 - - - - +SELECT customer.customer_id, customer_first_name, customer_last_name, +SUM(quantity* cost_to_customer_per_qty) as total_spend -- AGGREGATE FUNCTION +FROM customer +INNER JOIN customer_purchases -- JOINING 2 TABLES + ON customer.customer_id = customer_purchases.customer_id +GROUP BY customer.customer_id +HAVING total_spend > 2000 -- HAVING KEY WORD +ORDER BY customer_first_name ASC, customer_last_name; --END QUERY @@ -125,7 +166,14 @@ VALUES(col1,col2,col3,col4,col5) */ --QUERY 10 +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'); --END QUERY @@ -139,8 +187,11 @@ and year are! Limit to 25 rows of output. */ --QUERY 11 - - +SELECT customer_id +,strftime('%Y', market_date) AS year -- modifier for year is %Y +,strftime('%m', market_date) AS month -- modifier for month is %m +from customer_purchases +LIMIT 25; --END QUERY @@ -153,7 +204,12 @@ but remember, STRFTIME returns a STRING for your WHERE statement... AND be sure you remove the LIMIT from the previous query before aggregating!! */ --QUERY 12 - - +SELECT customer_id +,strftime('%Y', market_date) AS year -- modifier for year is %Y +,strftime('%m', market_date) AS month -- modifier for month is %m +,SUM(quantity* cost_to_customer_per_qty) as total_spend -- AGGREGATE FUNCTION +FROM customer_purchases +WHERE month = '04' AND year=='2022' +GROUP BY customer_id; --END QUERY