Using Variables, Sql Server

Using Variables

--Sql Server 2014 Express Edition
--Batches are separated by 'go'

select @@version as 'sql server version'

CREATE TABLE Products (
    ProductID int,
    ProductName varchar(255),
    ProductCategory varchar(255),
    ProductPrice decimal(10)
    )
   
INSERT INTO Products 
    (ProductID, ProductName, ProductCategory, ProductPrice)
VALUES
    (1, 'iPhone X',         'Technology',  1200),
    (2, 'Nike Vapor Shoes', 'Apparel',     180),
    (3, 'Ford Focus',       'Automobile', 18500),
    (4, 'Nissan Altima',    'Automobile', 18500),
    (5, 'Astros Cap',       'Apparel',      80),
    (6, 'Barcelona Jersey', 'Apparel',      90),
    (7, 'Samsung Galaxy',   'Technology',   850),
    (8, 'Apple Watch',      'Technology',   320)  
    
 -- Declaring a temporary variable to be used in the following query
 DECLARE @temp varchar(255) = ' Gadget'
 
 -- Selecting all Products with "Technology" as category, and adding the word "Gadget" to the category using the variable
 SELECT ProductName, ProductCategory + @temp
 FROM Products
 WHERE ProductCategory = 'Technology'
   
-- Using @category variable to store the result of a query
 DECLARE @category varchar(255)
 SET @category = (
     SELECT ProductCategory
     FROM Products
     WHERE 
         ProductPrice = (SELECT MIN(ProductPrice) FROM Products)
     )
 SELECT @category


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