CREATE PROCEDURE GetProductsInCategory
(@CategoryID INT, @DescriptionLength INT, @PageNumber INT, @ProductsPerPage INT, @HowManyProducts INT OUTPUT)
AS
-- declare a new TABLE variable
DECLARE @Products TABLE
(
RowNumber INT,
ProductID INT,
Name VARCHAR(50),
Description VARCHAR(5000),
Price MONEY,
Image1FileName VARCHAR(50),
Image2FileName VARCHAR(50),
OnDepartmentPromotion bit,
OnDepartmentPromotion bit)
-- populate the table variable with the complete list of products
INSERT INTO @Products
SELECT ROW_NUMBER() OVER (ORDER BY Product.ProductID),
Product.ProductID, Name, SUBSTRING(Description, 1, @DescriptionLength) + '...' AS Description,Price,
Image1FileName, Image2FileName, OnDepartmentPromotion, OnCatalogPromotion
FROM Product INNER JOIN ProductCategory
ON Product.ProductID = ProductCategory.ProductID
WHERE ProductCategory.CategoryID = @CategoryID
-- return the total number of products using an OUTPUT variable
SELECT @HowManyProducts = COUNT(ProductID) FROM @Products
-- extract the requested page of products
SELECT ProductID, Name, Description, Price, Image1FileName,
Image2FileName, OnDepartmentPromotion, OnCatalogPromotion
FROM @Products
WHERE RowNumber > (@PageNumber - 1) * @ProductsPerPage
AND RowNumber <= @PageNumber * @ProductsPerPage