amandaporto / databasics

databasics

Databasics

Fork this repository into your own github profile.

Before closing the homework assignment issue:

• Update this README as follows:

  • For each question (just after or below the question itself) include the SQL you wrote to generate the answer
  • For each question (just after or below the question itself) include the answer to the question asked.

• Also:

  • Commit the updated store.sqlite3 database file
  • Include a link to your forked repo in the comments when closing the issue.

NOTE: To run sqlite with this database: sqlite3 store.sqlite3

NOTE: You may want to keep a backup of the store.sqlite3 file in case you damage the file. OR you can use the command git checkout store.sqlite3 to undo any changes to the database file since the fork or your last commit.

Explorer Mode

• [√] How many users are there? select * from users; 50

• [√] What are the 5 most expensive items? select title, price from items order by price desc limit 5;

• Small Cotton Gloves 9984
  Small Wooden Comput 9859
  Awesome Granite Pan 9790
  Sleek Wooden Hat 9390
  Ergonomic Steel Car 9341 *

• [√] What's the cheapest book? (Does that change for "category is exactly 'book'" versus "category contains 'book'"?) select title, min(price) from items where category="Books"; Ergonomic Granite Chair 1496

Result does not change when searching in all categories containing Books . select title, min(price) from items where category like "Books%"; Ergonomic Granite Chair 1496

• [√] Who lives at "6439 Zetta Hills, Willmouth, WY"? Do they have another address? SELECT first_name, last_name, street, city, state FROM users JOIN addresses ON users.id = addresses.user_id WHERE street like "6439%"; Corrine Little 6439 Zetta Hills Willmouth WY

SELECT first_name, last_name, street, city, state FROM users JOIN addresses ON users.id = addresses.user_id WHERE first_name like "Corrine%"; *Corrine Little 6439 Zetta Hills Willmouth WY
Corrine Little 54369 Wolff Forg Lake Bryon CA *

• [√] Correct Virginie Mitchell's address to "New York, NY, 10108". UPDATE addresses SET city="New York", zip="10108" WHERE user_id=(SELECT id FROM users WHERE first_name = "Virginie"); *Virginie Mitchell 12263 Jake Crossing New York 10108
  Virginie Mitchell 83221 Mafalda Canyo New York 10108 *

• [√] How much would it cost to buy one of each tool? select sum(price) from items where category like "Tools%"; 24605

• [√] How many total items did we sell? select sum(quantity) from orders; 2125

• [√] How much was spent on books? SELECT category, sum(price*quantity) FROM items JOIN orders ON items.id = orders.item_id WHERE category="Books"; 420566

• [√] Simulate buying an item by inserting a User for yourself and an Order for that User. INSERT INTO users (first_name, last_name, email) VALUES ("Amanda", "Porto", "[email protected]"); INSERT INTO orders (item_id, quantity, user_id, created_at) VALUES ("78", "2", "51", datetime());

*378 51 78 2 2015-09-23 13:05:54 *

Adventure Mode

• What item was ordered most often? Grossed the most money?

• What user spent the most?

• What were the top 3 highest grossing categories?