Question

I have a column that I need to update with codes in a temp table.There is +/- 5 codes in the temp table. Each row in the table must be updated with one of the values in the temp table.

Example
id  code
1   200
2   400
3   600
4   9000
5   800
6   200
7   400
8   600
9   9000
10  800

Answer 1

SQL Server Solution

This query will sequentially take the values from the temp table and update the code in the example table in round robin fashion, repeating the values from temp when required.

update e
set code = t.code
from example e
join temp t on t.id = (e.id -1) % (select count(*) from temp) + 1

If the ids are not sequential in either table, then you can row_number() them first, e.g.

update e
set code = t.code
from (select *,rn=row_number() over (order by id) from example) e
join (select *,rn=row_number() over (order by id) from temp) t
  on t.rn = (e.rn -1) % (select count(*) from temp) + 1

The same technique (mod, row-number) can be used in other RDBMS, but the syntax will differ a little.