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69 changes: 59 additions & 10 deletions 02_activities/assignments/DC_Cohort/assignment1.sql
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@
--SELECT
/* 1. Write a query that returns everything in the customer table. */
--QUERY 1
SELECT * FROM customer;



Expand All @@ -17,8 +18,9 @@
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

Expand All @@ -28,7 +30,9 @@ sorted by customer_last_name, then customer_first_ name. */
Limit to 25 rows of output. */
--QUERY 3


SELECT * FROM customer_purchases
WHERE product_id IN (4, 9)
LIMIT 25;


--END QUERY
Expand All @@ -42,7 +46,9 @@ 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;



Expand All @@ -56,6 +62,14 @@ 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,
CASE
WHEN product_qty_type = "unit"
THEN "unit"
ELSE "bulk"
END AS product_qty_type_condensed
FROM product;




Expand All @@ -66,7 +80,13 @@ 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_qty_type,product_name,
CASE
WHEN lower(product_name) like "%pepper%"
THEN 1
ELSE 0
END As pepper_flag
FROM product;



Expand All @@ -79,7 +99,12 @@ 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 vendor_booth_assignments.market_date, vendor.vendor_name
FROM vendor
INNER JOIN vendor_booth_assignments
ON vendor.vendor_id = vendor_booth_assignments.vendor_id
ORDER by vendor_booth_assignments.market_date, vendor.vendor_name
LIMIT 24;


--END QUERY
Expand All @@ -93,7 +118,9 @@ Limit to 24 rows of output. */
at the farmer’s market by counting the vendor booth assignments per vendor_id. */
--QUERY 8


SELECT vendor_id, count(*) As booth_count
FROM vendor_booth_assignments
GROUP By vendor_id;


--END QUERY
Expand All @@ -106,6 +133,12 @@ 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_last_name,customer.customer_first_name, customer.customer_id,
sum(quantity*cost_per_quantity) As total_spent FROM customer
INNER JOIN customer_purchases ON customer.customer_id = customer_purchases.customer_id
GROUP By customer.customer_id, customer.customer_last_name, customer.customer_first_name
HAVING total_spent > 2000
ORDER By customer.customer_last_name, customer.customer_first_name;



Expand All @@ -124,9 +157,19 @@ When inserting the new vendor, you need to appropriately align the columns to be
VALUES(col1,col2,col3,col4,col5)
*/
--QUERY 10
CREATE Temp TABLE new_vendor AS SELECT* FROM vendor;

INSERT INTO new_vendor
(
vendor_id, vendor_name, vendor_type, vendor_owner_first_name, vendor_owner_last_name
)
VALUES
(
10,
"Thomas Superfood Store", "Fresh Focused", "Thomas", "Rosrnthal"
);


SELECT * FROM new_vendor;

--END QUERY

Expand All @@ -139,7 +182,9 @@ and year are!
Limit to 25 rows of output. */
--QUERY 11


SELECT customer_id, strftime('%m', market_date) As month, strftime('%Y', market_date) As year
FROM customer_purchases
LIMIT 25;


--END QUERY
Expand All @@ -153,7 +198,11 @@ 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('%m', market_date) As month, strftime('%Y', market_date) As year,
sum(quantity * cost_per_quantity) As total_spent
FROM customer_purchases
WHERE month = '04' AND year = '2022'
GROUP By customer_id, month, year;


--END QUERY
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