Skip to content

Homework 2 submitted #2

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
Daya709 wants to merge 1 commit into
base: main
Choose a base branch
from
Open

Homework 2 submitted #2

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
48 changes: 41 additions & 7 deletions 02_activities/homework/homework_2.sql
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,42 +1,76 @@
--SELECT
/* 1. Write a query that returns everything in the customer table. */

SELECT *
FROM customer


/* 2. Write a query that displays all of the columns and 10 rows from the cus- tomer table,
sorted by customer_last_name, then customer_first_ name. */

SELECT *
FROM customer
ORDER BY customer_last_name, customer_frist_name



--WHERE
/* 1. Write a query that returns all customer purchases of product IDs 4 and 9. */
-- option 1

SELECT *
FROM customer_purchases
WHERE product_id in (4,6)
-- option 2

SELECT *
FROM customer_purchases
WHERE product_id =4 or product_id =6
/*2. Write a query that returns all customer purchases and a new calculated column 'price' (quantity * cost_to_customer_per_qty),
filtered by vendor IDs between 8 and 10 (inclusive) using either:
1. two conditions using AND
2. one condition using BETWEEN
*/
-- option 1

SELECT *,
(quantity* cost_to_customer_per_qty) as price
from customer_purchases
WHERE vendor_id>= 8 AND vendor_id <= 10

-- option 2

SELECT *,
(quantity* cost_to_customer_per_qty) as price
from customer_purchases
WHERE vendor_id BETWEEN 8 AND 10
--CASE
/* 1. Products can be sold by the individual unit or by bulk measures like lbs. or oz.
Using the product table, write a query that outputs the product_id and product_name
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.” */

SELECT product_id,
product_name,
CASE
WHEN product_qty_type ='unit' then 'unit'
ELSE 'bulk'
END As prod_qty_type_condensed
FROM product

/* 2. We want to flag all of the different types of pepper products that are sold at the market.
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. */
ELECT product_id,
product_name,
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
FROM product


--JOIN
/* 1. Write a query that INNER JOINs the vendor table to the vendor_booth_assignments table on the
vendor_id field they both have in common, and sorts the result by vendor_name, then market_date. */
SELECT *
FROM vendor as v
INNER JOIN vendor_booth_assignments as va ON v.vendor_id = va.vendor_id
ORDER BY vendor_name,market_date