パラメータをコンマで区切る必要があります!
CREATE PROCEDURE ReturnPrice
@carID int,
@price decimal(18,2) output
AS
SELECT
@price = Price
FROM
dbo.Cars
WHERE
CarID = @carID
パラメータをコンマで区切る必要があります!
CREATE PROCEDURE ReturnPrice
@carID int,
@price decimal(18,2) output
AS
SELECT
@price = Price
FROM
dbo.Cars
WHERE
CarID = @carID