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Ashish Soni
Public
SQL Course
Edited
Jun 7, 2023
Fork of SQL Course: Session 4
10
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pizzeriaDB
SELECT row_number() over (partition by Category order by Launch) as "Row Number"
, *
FROM products
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pizzeriaDB
SELECT products.name
, products.size
, products.category
, count(distinct orders.id) as "Number of Orders"
, rank() over (partition by products.category order by count(distinct orders.id) DESC) as "Order Rank"
FROM products
JOIN order_items
ON products.SKU = order_items.SKU
JOIN orders
ON order_items.orderId = orders.id
GROUP BY 1, 2, 3

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pizzeriaDB
SELECT products.name
, products.size
, products.category
, date_part('year', orders.orderDate::date)::string as year_name
, row_number() over (partition by year_name order by orderDate asc) as row_num
FROM products
JOIN order_items
ON products.SKU = order_items.SKU
JOIN orders
ON order_items.orderId = orders.id
ORDER BY row_num, year_name
LIMIT 3
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pizzeriaDB
WITH utahStores AS (
SELECT *
FROM stores
WHERE state = 'Utah'
)

SELECT date_trunc('month', orders.orderDate::date) as "Month Name"
, count(distinct orders.id) as "Number of Orders"
FROM orders
JOIN utahStores
ON orders.storeId = utahStores.id
GROUP BY 1
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pizzeriaDB
WITH hawaiianOrders AS (
SELECT orders.orderDate::date as order_date
, count(distinct orders.id) as num_orders
FROM products
JOIN order_items
ON products.SKU = order_items.SKU
JOIN orders
ON order_items.orderId = orders.id
WHERE products.name like '%Hawaiian%'
GROUP BY 1
ORDER BY 1 ASC
), returnResults AS (
SELECT *
, avg(num_orders) over (
order by order_date asc
range between interval 3 days preceding
and interval 3 days following
) as moving_avg
FROM hawaiianOrders
)

SELECT *
FROM returnResults

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pizzeriaDB
WITH newData AS (
SELECT orders.id
, products.name
, products.Size
FROM orders
JOIN order_items
ON orders.id = order_items.orderId
JOIN products
ON order_items.SKU = products.SKU
WHERE Category = 'Vegetarian'
)

SELECT name
, Size
, count(distinct id)
FROM newData
GROUP BY 1, 2
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pizzeriaDB
Type SQL, then Shift-Enter. Ctrl-space for more options.

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groceries
SELECT avg(amount) as avg_amount
FROM groceries
WHERE category = 'Fruits'
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