title: sql code to get week number for FiscalYear
body: <p>Need sql code to get week number for FiscalYear –
  Date table ranges from 1975 to 2024</p>
  
  <p>Already have weekno (WeekOfYear) for CalendarYear
   -week count start from 1st of April and end on 31st march
   -Week start from Sunday to Saturday
   -On Fiscalyear end, week also ended </p>
  
  <p>eg. 
  1st apr 2016 -Week 1
  2nd apr 2016 - week 1
  3rd apr 2016 to 9th apr 2016 -week 2
  10th apr 2016 to 16th apr 2016 -week 3 ... and so on</p>