Software Applications Programming Errors and solutions.

declare start_date date; end_date date; begin select min(sales_date),max(sales_date) into start_date, end_date from t1; for start_date <= end_date loop Insert Into t1 (ShopName , sales_Date, Sales) Select t2.ShopName , nvl(t1.sales_Date,start_date), nvl(t1.Sales,0) From t1, t2 Where t1.sales_Date=start_date; start_date:=start_date+1; end loop; end;