Column Names From the Select List
select
customer_no, sum(amount) from orders group by customer_no
select
city, state, count(distinct company) from customers group
by city, state
Column Names Not in the Select List
select
status, sum(amount) from orders group by customer_no, status
select
count(company) from customers group by state
Having
select
customer_no, sum(amount) from orders
group
by customer_no having customer_no = 1001
select
customer_no, sum(amount) from orders
group
by customer_no having status != 'shipped'
select
status, sum(amount) from orders group by status having customer_no
in (select
customer_no from customers where company='systems')
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