1 CREATE OR REPLACE FUNCTION GET_WEEK (V_RQ in DATE) return varchar2 as
2    str  varchar2(20);
3    str1 varchar2(20);
4 
5 begin
6    str :=TRIM(TO_CHAR(TRUNC((V_RQ+TO_CHAR(TRUNC(V_RQ,‘YYYY‘),‘D‘)-1 -TRUNC(V_RQ,‘YYYY‘))/7)+1,‘00‘));
7    return str;
8 end;