public static void FastQuery()
{
using (TelerikAcademyEntities context = new TelerikAcademyEntities())
{
var emp = context.Employees
.Select(x => x.Address)
.Select(t => t.Town)
.Where(t => t.Name == "Sofia");
}
}
/*
Using Entity Framework write a SQL query to select all employees from the Telerik Academy database and later print their name,
department and town.
Try the both variants: with and without .Include(…).
Compare the number of executed SQL statements and the performance.
*/
public static void SlowQuery()
{
using (TelerikAcademyEntities context = new TelerikAcademyEntities())
{
var employees = context.Employees;
foreach (var employee in employees)
{
Console.WriteLine(employee.FirstName + " " + employee.Address.Town.Name + " " + employee.Department.Name);
}
}
}
public static void FastQuery()
{
using (TelerikAcademyEntities context = new TelerikAcademyEntities())
{
var employees =
from employee in context.Employees
join department in context.Departments
on employee.DepartmentID equals department.DepartmentID
join address in context.Addresses
on employee.AddressID equals address.AddressID
join town in context.Towns
on address.TownID equals town.TownID
select employee.FirstName + " "+ employee.Department.Name + " " + employee.Address.Town.Name;
foreach (var employee in employees)
{
Console.WriteLine(employee);
}
}
}
