UofT-DSI | SQL - Assignment 1

02_activities/assignments/DC_Cohort/assignment1.sql

@@ -7,6 +7,8 @@
 /* 1. Write a query that returns everything in the customer table. */
 --QUERY 1
 
+SELECT * FROM customer
+
 
 
 
@@ -17,7 +19,9 @@
 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
@@ -28,6 +32,9 @@ sorted by customer_last_name, then customer_first_ name. */
 Limit to 25 rows of output. */
 --QUERY 3
 
+SELECT * FROM customer_purchases
+WHERE product_id = 4 OR 9
+LIMIT 25
 
 
 
@@ -43,7 +50,10 @@ Limit to 25 rows of output.
 */
 --QUERY 4
 
-
+SELECT * FROM customer_purchases
+WHERE customer_id = 8 BETWEEN 10
+SELECT quantity * cost_per_quantity AS price
+LIMIT 25
 
 
 --END QUERY
@@ -56,7 +66,12 @@ columns and add a column called prod_qty_type_condensed that displays the word 
 if the product_qty_type is “unit,” and otherwise displays the word “bulk.” */
 --QUERY 5
 
-
+SELECT product_id, product_name, product_qty_type FROM product
+CASE
+	WHEN product_qty_type = 'unit'
+		THEN 'unit'
+	ELSE 'bulk'
+END AS 'prod_qty_type_condensed'
 
 
 --END QUERY
@@ -67,7 +82,17 @@ 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, product_qty_type FROM product
+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'
 
 
 --END QUERY
@@ -79,6 +104,11 @@ vendor_id field they both have in common, and sorts the result by market_date, t
 Limit to 24 rows of output. */
 --QUERY 7
 
+SELECT * FROM vendor
+INNER JOIN vendor_booth_assignment
+ON vendor.vendor_id = vendor_booth_assignment.vendor_id
+ORDER BY market_date, vendor_name
+LIMIT 24
 
 
 
@@ -93,6 +123,10 @@ Limit to 24 rows of output. */
 at the farmer’s market by counting the vendor booth assignments per vendor_id. */
 --QUERY 8
 
+SELECT * FROM vendor
+INNER JOIN vendor_booth_assignment
+ON vendor.vendor_id = vendor_booth_assignment.vendor_id
+COUNT(GROUP BY vendor_id)
 
 
 
@@ -107,7 +141,13 @@ HINT: This query requires you to join two tables, use an aggregate function, and
 --QUERY 9
 
 
-
+SELECT * FROM customer
+INNER JOIN customer_purchases
+ON customer.customer_id = customer_purchases.customer_id
+GROUP BY customer_id
+SUM(quantity*cost_per_quantity) AS total_spent
+HAVING total_spent > 2000
+ORDER BY last_name, first_name
 
 --END QUERY
 
@@ -124,9 +164,8 @@ When inserting the new vendor, you need to appropriately align the columns to be
 VALUES(col1,col2,col3,col4,col5) 
 */
 --QUERY 10
-
-
-
+SELECT * FROM vendor INTO temp.new_vendor
+VALUES(10, 'Thomass Superfood Store', 'Fresh Focused', 'Thomas', 'Rosenthal')
 
 --END QUERY
 
@@ -140,20 +179,31 @@ Limit to 25 rows of output. */
 --QUERY 11
 
 
-
+SELECT customer_id, market_date FROM customer_purchases
+SELECT STRFTIME('%M', market_date) AS month
+SELECT STRFTIME('%Y', market_date) AS year
+LIMIT 25 
 
 --END QUERY
 
 
 /* 2. Using the previous query as a base, determine how much money each customer spent in April 2022. 
 Remember that money spent is quantity*cost_per_quantity. 
 
+
 HINTS: you will need to AGGREGATE, GROUP BY, and filter...
 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 * FROM customer_purchases
+SELECT STRFTIME('%M', market_date) AS month
+SELECT STRFTIME('%Y', market_date) AS year
+GROUP BY customer_id
+HAVING month = '04' AND year = '2022'
+SUM(quantity*cost_per_quantity) AS price
+
 
 
 --END QUERY