title: Tracking course's sublesson status of each user using mysql
body: <p>I am developing a LMS.I have three tables</p>
  <p>1.sublesson_table</p>
  <p>course_id,sublesson_id,sublesson_title
  1            1.             Title 1
  2            2.             Title 2
  3            3.             Title 3
  4            4.             Title 4</p>
  <p>2.user Table
  user_id,user_name
  1        Test
  2        Test1
  3        Test2</p>
  <p>3.sublesson_complete_table
  completed_id,sublesson_id,user_id,status
  1              1           1       completed
  2              2           2       completed</p>
  <p>Expected output</p>
  <p>sublesson_id ,sublesson_title,   user_id,  user_name,  status
  1             Title 1           1       Test     Completed
  2             Title 2           1       Test     Not Completed
  3             Title 3           1       Test     Not Completed
  4             Title 4           1       Test     Not Completed
  1             Title 1           2       Test1    Not completed
  2             Title 2           2       Test1    completed
  3             Title 3           2       Test1    Not Completed
  4             Title 4           2       Test1    Not Completed
  1             Title 1           3       Test2    Not completed
  2             Title 2           3       Test2    Not completed
  3             Title 3           3       Test2    Not Completed
  4             Title 4           3       Test2    Not Completed</p>
  <p>I need to track each sublesson progress by each user using mysql.</p>