Share of category stock — SQL practice · JobPrax

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Window functions: LAG, LEAD & running totals

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Share of category stock

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Show category, product_name, stock and pct: the product's stock as a percentage of its category's stock, rounded to 2 decimals.

Tables

customers

customer_idinteger
namevarchar
cityvarchar
statevarchar
signup_datedate
emailvarchar
phonevarchar
referred_byinteger

order_items

order_idinteger
product_idinteger
quantityinteger
unit_priceinteger

orders

order_idinteger
customer_idinteger
order_datedate
statusvarchar
payment_methodvarchar

products

product_idinteger
product_namevarchar
categoryvarchar
priceinteger
stockinteger

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