SQL Server store multiple values in sql variable

Question

I have the following query:

select * 
from cars 
where make in (\'BMW\', \'Toyota\', \'Nissan\')

What I want to do is store the where param

Answer 1

Use CTE for storing multiple values into a single variable.

;WITH DATA1 AS 
(
    select car_name
    from cars 
    where make in ('BMW', 'Toyota', 'Nissan')
)
SELECT @car_name = CONCAT(@car_name,',',car_name)
FROM DATA1

select @car_name