private DataTable GetDistinctRows(DataTable dtAlredy, DataTable dtGoingToAdd)
    {
        try
        {
            string strOldFoodID = "";
            for (int i = 0; i < dtAlredy.Rows.Count; i++)
            {
                strOldFoodID += dtAlredy.Rows[i]["Food_ID"].ToString() + ',';
            }
            strOldFoodID = strOldFoodID.TrimEnd(',');
            string[] arrOldFoods = strOldFoodID.Split(',');

            for (int index = 0; index < dtGoingToAdd.Rows.Count; index++)
            {
                string newFoodID = dtGoingToAdd.Rows[index]["Food_ID"].ToString();
                if (!arrOldFoods.Contains(newFoodID))
                {
                    DataRow drNewFooRow = dtAlredy.NewRow();
                    drNewFooRow = dtGoingToAdd.Rows[index];
                    dtAlredy.ImportRow(drNewFooRow);
                }
            }
            return dtAlredy;
        }
        catch
        {
            throw;
        }
    }

create function [dbo].[DateDiffBetweenTwoDates](@Date1 datetime, @Date2 datetime)
   RETURNS varchar(100)
AS

Begin
DECLARE @thisYearBirthDay datetime
DECLARE @years int, @months int, @days int

set @thisYearBirthDay = DATEADD(year, DATEDIFF(year, @Date1, @Date2), @Date1)
set @years = DATEDIFF(year, @Date1, @Date2) - (CASE WHEN @thisYearBirthDay > @Date2 THEN 1 ELSE 0 END)
set @months = MONTH(@Date2 - @thisYearBirthDay) - 1
set @days = DAY(@Date2 - @thisYearBirthDay) - 1

return cast(@years as varchar(2)) + ' years,' + cast(@months as varchar(2)) + ' months,' + cast(@days as varchar(3)) + ' days'
end


--Select dbo.DateDiffBetweenTwoDates('1986-01-28', getdate())