Créer une procédure SQL
CREATE TABLE Products
(
Id INT IDENTITY PRIMARY KEY,
ProductName NVARCHAR(30) NOT NULL,
Manufacturer NVARCHAR(20) NOT NULL,
ProductCount INT DEFAULT 0,
Price MONEY NOT NULL
);
--1
GO
CREATE PROCEDURE AddProduct
@name NVARCHAR(20),
@manufacturer NVARCHAR(20),
@count INT,
@price MONEY
AS
INSERT INTO Products(ProductName, Manufacturer, ProductCount, Price)
VALUES(@name, @manufacturer, @count, @price)
DECLARE @prodName NVARCHAR(20), @company NVARCHAR(20);
DECLARE @prodCount INT, @price MONEY
SET @prodName = 'Galaxy C7'
SET @company = 'Samsung'
SET @price = 22000
SET @prodCount = 5
EXEC AddProduct @prodName, @company, @prodCount, @price
SELECT * FROM Products
--2
GO
CREATE PROCEDURE AddProductWithOptionalCount
@name NVARCHAR(20),
@manufacturer NVARCHAR(20),
@price MONEY,
@count INT = 1
AS
INSERT INTO Products(ProductName, Manufacturer, ProductCount, Price)
VALUES(@name, @manufacturer, @count, @price)
DECLARE @prodName NVARCHAR(20), @company NVARCHAR(20), @price MONEY
SET @prodName = 'Redmi Note 5A'
SET @company = 'Xiaomi'
SET @price = 22000
EXEC AddProductWithOptionalCount @prodName, @company, @price
SELECT * FROM Products
--3
GO
CREATE PROCEDURE GetPriceStats
@minPrice MONEY OUTPUT,
@maxPrice MONEY OUTPUT
AS
SELECT @minPrice = MIN(Price), @maxPrice = MAX(Price)
FROM Products
DECLARE @minPrice MONEY, @maxPrice MONEY
EXEC GetPriceStats @minPrice OUTPUT, @maxPrice OUTPUT
PRINT 'Минимальная цена ' + CONVERT(VARCHAR, @minPrice)
PRINT 'Максимальная цена ' + CONVERT(VARCHAR, @maxPrice)
--4
GO
CREATE PROCEDURE CreateProduct
@name NVARCHAR(20),
@manufacturer NVARCHAR(20),
@count INT,
@price MONEY,
@id INT OUTPUT
AS
INSERT INTO Products(ProductName, Manufacturer, ProductCount, Price)
VALUES(@name, @manufacturer, @count, @price)
SET @id = @@IDENTITY
DECLARE @id INT
EXEC CreateProduct 'LG V30', 'LG', 3, 28000, @id OUTPUT
PRINT @id
--5
GO
CREATE PROCEDURE GetAvgPrice AS
DECLARE @avgPrice MONEY
SELECT @avgPrice = AVG(Price)
FROM Products
RETURN @avgPrice;
DECLARE @result MONEY
EXEC @result = GetAvgPrice
PRINT @result
