Question

I have such question for database developers.
I have a table which has two columns, first one is ID, Second one is Year(2002,2003,2004…it is string). I want to update them by switching the records.
In the beginning it is like this.

ID    Year
1     2002
2     2003
3     2004

I want to switch them and make like this.

ID    Year
1     2003
2     2002
3     2004

Please pay attention that My Year Column is unique.
So I tried something like this but did not work for me.

SqlCeCommand sss = new SqlCeCommand("Update Year Set Year='" + Year1 + "' Where Year='" + Year2 + "'", MainWindow._Conn);

Answer 1

Consider setting id to the number of years that are smaller or equal:

update   YourTable
set      id = 
         (
         select  count(*)
         from    YourTable yt2
         where   yt2.Year <= YourTable.year
         )

Live example at SQL Fiddle.