MRECW Students E- Learning Point Computer Security Student (CSS)

SELECT DISTINCT Example

The following SQL statement selects only the distinct values from the "City" columns from the "Customers" table:

Example

SELECT DISTINCT City FROM Customers; 

The following SQL statement selects the "ProductName" and "Price" records that have an above average price:

Example

SELECT ProductName, Price FROM Products
WHERE Price>(SELECT AVG(Price) FROM Products);

Joins

Example

SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderDate
FROM Orders
INNER JOIN Customers
ON Orders.CustomerID=Customers.CustomerID;