completed sql file and ERdiagram pdf

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;
 
 
 
@@ -16,7 +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;
 
 
 
@@ -27,7 +31,10 @@ 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 IN (4, 9)
+LIMIT 25;
 
 
 
@@ -42,7 +49,11 @@ 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;
 
 
 
@@ -55,7 +66,13 @@ 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,
+       CASE
+           WHEN product_qty_type = 'unit' THEN 'unit'
+           ELSE 'bulk'
+       END AS prod_qty_type_condensed
+FROM product;
 
 
 
@@ -66,7 +83,17 @@ 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;
 
 
 
@@ -78,7 +105,18 @@ 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 v.vendor_id,
+       v.vendor_name,
+       v.vendor_type,
+       v.vendor_owner_first_name,
+       v.vendor_owner_last_name,
+       vba.booth_number,
+       vba.market_date
+FROM vendor AS v
+INNER JOIN vendor_booth_assignments AS vba
+    ON v.vendor_id = vba.vendor_id
+ORDER BY vba.market_date, v.vendor_name
+LIMIT 24;
 
 
 
@@ -92,7 +130,11 @@ Limit to 24 rows of output. */
 /* 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
-
+SELECT vendor_id,
+       COUNT(*) AS times_rented
+FROM vendor_booth_assignments
+GROUP BY vendor_id
+ORDER BY vendor_id;
 
 
 
@@ -105,7 +147,15 @@ 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_last_name,
+       c.customer_first_name,
+       SUM(cp.quantity * cp.cost_to_customer_per_qty) 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
+HAVING total_spent > 2000
+ORDER BY c.customer_last_name, c.customer_first_name;
 
 
 
@@ -124,10 +174,17 @@ When inserting the new vendor, you need to appropriately align the columns to be
 VALUES(col1,col2,col3,col4,col5) 
 */
 --QUERY 10
-
-
-
-
+CREATE TEMPORARY 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', 'Fresh Focused', 
+     'Thomas', 'Rosenthal');
+
+SELECT * FROM temp.new_vendor;
 --END QUERY
 
 
@@ -138,7 +195,11 @@ HINT: you might need to search for strfrtime modifers sqlite on the web to know
 and year are! 
 Limit to 25 rows of output. */
 --QUERY 11
-
+SELECT customer_id,
+       STRFTIME('%m', market_date) AS purchase_month,
+       STRFTIME('%Y', market_date) AS purchase_year
+FROM customer_purchases
+LIMIT 25;
 
 
 
@@ -152,7 +213,13 @@ 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 customer_id,
+       SUM(quantity * cost_to_customer_per_qty) AS total_spent
+FROM customer_purchases
+WHERE STRFTIME('%m', market_date) = '04'
+  AND STRFTIME('%Y', market_date) = '2022'
+GROUP BY customer_id
+ORDER BY customer_id;