SQL Queries

-
use empdemographics;
select firstname,lastname,age
from employeedemographics
where age is not null;

select firstname,lastname,age
from employeedemographics
where age is not null
order by age;

select firstname,lastname,age,
case when age>30 then 'old'
else 'young'
end
from employeedemographics
where age is not null
order by age;

select *,
case when age>30 then 'old'
else 'young'
end
from employeedemographics
where age is not null
order by age;

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