On 07/04/2018 07:48 AM, hmidi slim wrote:
Hi,
I need to use conditional expression in my query, So I want to make a
query like this:
select numberOfPremiumDays
case when numberOfPremiumDays = date_part('day',
('2018-11-05'::timestamp) - ('2018-11-01'::timestamp)) then
select product_id,
price
from product
where occupation_type_id = 1
group by product_id, occupation_type_id
However, in the documentation I found that the return of case was a value,
not like in my case I want to return a select statement.
How can I use a conditional expression in a sql query?
Best Regards.
The CASE clause is used to return one of many choices. Based on this
example, you need to do this:
select numberOfPremiumDays,
product_id,
price
from product
where occupation_type_id = 1
and numberOfPremiumDays = date_part('day', ('2018-11-05'::timestamp) -
('2018-11-01'::timestamp))
group by product_id, occupation_type_id
--
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