Select query using variable not running in mssql - sql-server

Question

Select query is not working when use variable in MSSQL2014
My Schema is :-
CREATE TABLE product
(idproduct int, name varchar(50), description varchar(50), tax decimal(18,0))
INSERT INTO product
(idproduct, name, description,tax)
VALUES
(1, 'abc', 'This is abc',10),
(2, 'xyz', 'This is xyz',20),
(3, 'pqr', 'This is pqr',15)
CREATE TABLE product_storage
(idstorage int,idproduct int,added datetime, quantity int, price decimal(18,0))
INSERT INTO product_storage
(idstorage,idproduct, added, quantity,price)
VALUES
(1, 1, 2010-01-01,0,10.0),
(2, 1, 2010-01-02,0,11.0),
(3, 1, 2010-01-03,10,12.0),
(4, 2, 2010-01-04,0,12.0),
(5, 2, 2010-01-05,10,11.0),
(6, 2, 2010-01-06,10,13.0),
(7, 3, 2010-01-07,10,14.0),
(8, 3, 2010-01-07,10,16.0),
(9, 3, 2010-01-09,10,13.0)
and i am executing below command:-
declare #price1 varchar(10)
SELECT p.idproduct, p.name, p.tax,
[#price1]=(SELECT top 1 s.price
FROM product_storage s
WHERE s.idproduct=p.idproduct AND s.quantity > 0
ORDER BY s.added ASC),
(#price1 * (1 + tax/100)) AS [price_with_tax]
FROM product p
;
This is not working in MSSQL, Please Help me out.
for detail check http://sqlfiddle.com/#!6/91ec2/296
And My query is working in MYSQL
Check for detail :- http://sqlfiddle.com/#!9/a71b8/1

Answer 1

Try this query
SELECT
p.idproduct
, p.name
, p.tax
, (t1.price * (1 + tax/100)) AS [price_with_tax]
FROM product p
inner join
(
SELECT ROW_NUMBER() over (PARTITION by s.idproduct order by s.added ASC) as linha, s.idproduct, s.price
FROM product_storage s
WHERE s.quantity > 0
) as t1
on t1.idproduct = p.idproduct and t1.linha = 1

Answer 2

Try it like this:
Explanantion: You cannot use a variable "on the fly", but you can do row-by-row calculation in an APPLY...
SELECT p.idproduct, p.name, p.tax,
Price.price1,
(price1 * (1 + tax/100)) AS [price_with_tax]
FROM product p
CROSS APPLY (SELECT top 1 s.price
FROM product_storage s
WHERE s.idproduct=p.idproduct AND s.quantity > 0
ORDER BY s.added ASC) AS Price(price1)
;
EDIT: Your Fiddle uses a bad literal date format, try this:
INSERT INTO product_storage
(idstorage,idproduct, added, quantity,price)
VALUES
(1, 1, '20100101',0,10.0),
(2, 1, '20100102',0,11.0),
(3, 1, '20100103',10,12.0),
(4, 2, '20100104',0,12.0),
(5, 2, '20100105',10,11.0),
(6, 2, '20100106',10,13.0),
(7, 3, '20100107',10,14.0),
(8, 3, '20100108',10,16.0),
(9, 3, '20100109',10,13.0)

Answer 3

Here is the correct schema for SQL Server and query runs perfect as Shnugo Replied.
VALUES
(1, 1, convert(datetime,'2010-01-01'),0,10.0),
(2, 1, convert(datetime,'2010-01-02'),0,11.0),
(3, 1, convert(datetime,'2010-01-03'),10,12.0),
(4, 2, convert(datetime,'2010-01-04'),0,12.0),
(5, 2, convert(datetime,'2010-01-05'),10,11.0),
(6, 2, convert(datetime,'2010-01-06'),10,13.0),
(7, 3, convert(datetime,'2010-01-07'),10,14.0),
(8, 3, convert(datetime,'2010-01-07'),10,16.0),
(9, 3, convert(datetime,'2010-01-09'),10,13.0)