There are two tables Customer_table and Customer_profit. If we need to get the company contact number and company profit using a single query we can use a simple joining technique for example
SELECT U.`Contact`,P.`Profit` FROM `Customer_table` U ,`Customer_profit` P WHERE U.`Company`=P.`Company` AND U.`Company`='Ernst Handel'
using the above query we can get contact and profit of “Ernst Handel” Company. using a different type of alphabet we can add tables to the above query. Each alphabet must use before representing the table columns