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Add files via upload #21

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16 changes: 16 additions & 0 deletions 2nd_Mock.sql
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Original file line number Diff line number Diff line change
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# 1045. Customers Who Bought All Products
# Write your MySQL query statement below
SELECT customer_id
FROM Customer
GROUP BY customer_id
HAVING COUNT(distinct product_key) = (select COUNT(product_key) FROM Product);

# 1070. Product Sales Analysis III
# Write your MySQL query statement below
SELECT product_id, year AS first_year, quantity, price
FROM Sales
WHERE (product_id, year) IN (
SELECT product_id, MIN(year) as firstyear
FROM Sales
GROUP BY product_id
)