diff --git a/02_activities/assignments/Microcredential_Cohort/Assignment1.md b/02_activities/assignments/Microcredential_Cohort/Assignment1.md index 45f0f5250..3ae22d4c2 100644 --- a/02_activities/assignments/Microcredential_Cohort/Assignment1.md +++ b/02_activities/assignments/Microcredential_Cohort/Assignment1.md @@ -120,6 +120,7 @@ Steps to complete this part of the assignment: #### SELECT 1. Write a query that returns everything in the customer table. + 2. Write a query that displays all of the columns and 10 rows from the customer table, sorted by customer_last_name, then customer_first_ name.
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diff --git a/02_activities/assignments/Microcredential_Cohort/assignment1.sql b/02_activities/assignments/Microcredential_Cohort/assignment1.sql index 518415744..9e9ef05f5 100644 --- a/02_activities/assignments/Microcredential_Cohort/assignment1.sql +++ b/02_activities/assignments/Microcredential_Cohort/assignment1.sql @@ -6,7 +6,8 @@ --SELECT /* 1. Write a query that returns everything in the customer table. */ --QUERY 1 - +SELECT * +FROM customer; @@ -16,8 +17,10 @@ /* 2. Write a query that displays all of the columns and 10 rows from the customer table, sorted by customer_last_name, then customer_first_ name. */ --QUERY 2 - - +SELECT * +FROM customer +ORDER BY customer_last_name, customer_first_name +LIMIT 10; --END QUERY @@ -27,7 +30,11 @@ sorted by customer_last_name, then customer_first_ name. */ /* 1. Write a query that returns all customer purchases of product IDs 4 and 9. Limit to 25 rows of output. */ --QUERY 3 - +SELECT * +FROM customer_purchases +WHERE product_id = '4' +OR product_id = '9' +LIMIT 25; @@ -42,9 +49,10 @@ filtered by customer IDs between 8 and 10 (inclusive) using either: Limit to 25 rows of output. */ --QUERY 4 - - - +SELECT *, quantity * cost_per_quantity as price +FROM customer_purchases +WHERE customer_id BETWEEN 8 AND 10 +LIMIT 25; --END QUERY @@ -55,8 +63,12 @@ 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, +CASE + WHEN product_qty_type = 'unit' THEN 'unit' + ELSE 'bulk' +END as prod_qty_type_condensed +FROM product; --END QUERY @@ -66,8 +78,17 @@ if the product_qty_type is “unit,” and otherwise displays the word “bulk. 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. */ --QUERY 6 +SELECT product_id, product_name, +CASE + WHEN product_qty_type = 'unit' THEN 'unit' + ELSE 'bulk' +END as prod_qty_type_condensed, +CASE + WHEN LOWER(product_name) LIKE '%pepper%' THEN 1 + ELSE 0 +END as pepper_flag - +FROM product; --END QUERY @@ -78,7 +99,12 @@ 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 * +FROM vendor as v +INNER JOIN vendor_booth_assignments as vba +ON v.vendor_id = vba.vendor_id +ORDER BY market_date, vendor_name +LIMIT 24; @@ -91,10 +117,13 @@ Limit to 24 rows of output. */ -- 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. */ ---QUERY 8 - - - +--QUERY +SELECT v.vendor_id, v.vendor_name, +COUNT (vba.vendor_id) as booth_count +FROM vendor_booth_assignments as vba +INNER JOIN vendor as v +ON vba.vendor_id = v.vendor_id +GROUP BY v.vendor_id, v.vendor_name --END QUERY @@ -105,9 +134,14 @@ 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 c.customer_id, c.customer_first_name, c.customer_last_name, +SUM(cp.quantity * cp.cost_per_quantity) as total_spent +FROM customer as c +INNER JOIN customer_purchases as cp +ON c.customer_id = cp.customer_id +GROUP BY c.customer_id, c.customer_first_name, c.customer_last_name +HAVING SUM(cp.quantity * cp.cost_per_quantity) > 2000 +ORDER BY c.customer_last_name, c.customer_first_name --END QUERY @@ -124,9 +158,12 @@ When inserting the new vendor, you need to appropriately align the columns to be 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, vendor_address) +VALUES (10, 'Thomass Superfood Store', 'Fresh Focused', 'Thomas', 'Rosenthal'); --END QUERY diff --git a/02_activities/assignments/Microcredential_Cohort/logical_model_diagram_assignment1.png b/02_activities/assignments/Microcredential_Cohort/logical_model_diagram_assignment1.png new file mode 100644 index 000000000..d11ed55d9 Binary files /dev/null and b/02_activities/assignments/Microcredential_Cohort/logical_model_diagram_assignment1.png differ