Question

Heres the situation, a database was created and not normalized. The table LUT_ProductInfo contains a field called flavor that is populated with an actual flavor name (ie Coke Classic). I created a lookup table LUT_Flavors with all of the flavor names complete with PKs. I need to replace all of the flavor names in LUT_Product info with the corresponding foreign key from the LUT_Flavors table. At the moment, the flavor names in each table are identical so the swap should be clean.

I tried something like this:

update LUT_ProductInfo 
set flavor =
     (select LUT_Flavor.id, LUT_Flavor.flavor 
      from LUT_ProductInfo prod 
      join LUT_Flavor on LUT_Flavor.flavor = prod.flavor).ID
where 
      LUT_ProductInfo.flavor = (select LUT_Flavor.id,LUT_Flavor.flavor 
                                from LUT_ProductInfo prod 
                                join LUT_Flavor
                                on LUT_Flavor.flavor = prod.flavor).flavor

But that broke some rules I guess and didn’t do anything. Does anyone have any insight?

Answer 1

Sorry, am on the road, so no database to try this on – but try:

update LUT_ProductInfo 
set flavor = f.id
from  LUT_ProductInfo p, 
LUT_Flavour f
where f.flavor = p.flavor