SQL Convert Week Number to Date (dd/MM)

Question

I am trying to convert the week number (for example: 21) in SQL-Server to the date (from the Monday of that week) in dd/MM format.

Answer 1

How about this?

DECLARE @YearNum SMALLINT = 2016;
DECLARE  @WeekNum TINYINT=25;

select 
    SUBSTRING(CONVERT(VARCHAR(10),selected_date,105),0,6) AS WeeKDate
from 
(select DATEADD(dd,t4.i*10000 + t3.i*1000 + t2.i*100 + t1.i*10 + t0.i,'1970-01-01') selected_date from
 (select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t0,
 (select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t1,
 (select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t2,
 (select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t3,
 (select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t4) v
where YEAR(selected_date)=@YearNum
AND DATEPART(WK,selected_date)=@WeekNum
AND DATEPART(WEEKDAY,selected_date)=2 -- Monday