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Done Mock_SQL2 #29

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4 changes: 4 additions & 0 deletions customers-who-bought-all-products.sql
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Original file line number Diff line number Diff line change
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# Write your MySQL query statement below
select customer_id
From (select customer_id , count(distinct(product_key)) as cnt
from customer group by customer_id) as s where cnt = (select count(*) from Product);
8 changes: 8 additions & 0 deletions product-sales-analysis-iii.sql
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# Write your MySQL query statement below
With CTE as (
select product_id, min(year) as 'first_year' from Sales group by product_id
)
select s.product_id, s.year as 'first_year', s.quantity, s.price from Sales s
join cte on cte.first_year=s.year and cte.product_id=s.product_id;