SQL-Coding/SQL_3_aggregation.sql at main · Anushri1903/SQL-Coding · GitHub

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select
sum(sales_cost) as sum_sales_cost,
min(sales_cost) as min_sales_cost,
max(sales_cost) as max_sales_cost,
avg(sales_cost) as avg_sales_cost,
count(*) as number_of_observations
from
grocery_db.transactions;

---- Group-By-----

select
transaction_date,
sum(sales_cost) as sum_sales_cost,
count(distinct transaction_id) as dict_transaction

from
grocery_db.transactions
group by
transaction_date
order by
transaction_date;

---- Group-By Multi variable-----
select
product_area_id,
transaction_date,
sum(sales_cost) as sum_sales_cost,
count(distinct transaction_id) as dict_transaction

from
grocery_db.transactions

group by
transaction_date,
product_area_id
order by
transaction_date,
product_area_id;


--- Having---
select
transaction_date,
sum(sales_cost) as total_sales
from
grocery_db.transactions
group by
transaction_date
having sum(sales_cost) > 2000
;