Hi!!, My name is Lucas and I have trouble with 3 points from a test. The problems are: 1- Get all employees who worked every day from 01-05-2006 to 10-05-2006 (dd-mm-yyyy) and not worked since the day 11-05-2006 until 20-05-2006 day ( dd-mm-yyyy). 2- Get the total number of hours worked per employee for the month of May 2006, considering only those employees supervised by Pedro. 3- Get the total number of hours worked per employee in 2006. For this I have two tables Employees_1 a call and another call Employees_2. In Table Employees_1 I have three columns employee_id, Name_Employe, Surname_Employee. In Table Employees_2 I have thre columns employee_id, Start_Date, End_Date (In the columns Star_Date and End_Date I have such data as "01-05-2006 10:12:00 // "01-05-2006 18:00:00""). I need help, I do not know how to solve these problems. Thanks!!!!