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

I wrote about this here if you want to see it in detail. In the mean time, you can't do it exactly how you are thinking.

Your choices are:

Using the LIKE command:

DECLARE @CarOptions varchar(100)
SET @CarOptions = 'Ford, Nisan, Toyota'

SELECT *
FROM Cars
WHERE ','+@CarOptions+',' LIKE ',%'+CAST(Make AS varchar)+',%'

A spliter function

DECLARE @CarOptions varchar(100)
SET @CarOptions = 'Ford, Nisan, Toyota'

SELECT Cars.*
FROM Cars
JOIN DelimitedSplit8K (@CarOptions,',') SplitString
    ON Cars.Make = SplitString.Item

Dyanmic SQL

DECLARE @CarOptions varchar(100)
SET @CarOptions = 'Ford, Nisan, Toyota'

DECLARE @sql nvarchar(1000)

SET @sql = 'SELECT * ' + 
            'FROM Cars ' + 
            'WHERE Make IN ('+@CarOptions+') '

EXEC sp_executesql @sql

In the mean time your best option is going to be to get rid of the variable completely.

SELECT * FROM cars WHERE make IN (SELECT make FROM carsforsale );

Answer 2

You can use a table variable:

declare @caroptions table
(
    car varchar(1000)
)

insert into @caroptions values ('BMW')
insert into @caroptions values ('Toyota')
insert into @caroptions values ('Nissan')

select * from cars where make in (select car from @caroptions)

Answer 3

why not?

SELECT * FROM cars WHERE make IN (SELECT DISTINCT(make) FROM carsforsale)

Answer 4

you can use JOIN statement.

SELECT distinct c.*
FROM cars c
JOIN carsfrosale s
ON s.id = c.fk_s

If you want filter your list of carsforsale you can add

WHERE s.id in (....)

Answer 5

Fetch 1 value in table and store in variable    
=======================================================================================

Declare @query int

    select @query = p.ProductID From Product p inner join ReOrdering as r on 
    p.ProductID = r.ProductID and r.MinQty >= p.Qty_Available

    print @query

Answer 6

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