How would one go about building a multi-column unique constraint where null is a significant value, eg. (1, NULL) <> (2, NULL)?
I see a number of references to not being able to use an index for this, but no mention of an alternative. Any pointers would be appreciated __________________________________________________________________________________ *Mike Blackwell | Technical Analyst, Distribution Services/Rollout Management | RR Donnelley* 1750 Wallace Ave | St Charles, IL 60174-3401 Office: 630.313.7818 mike.blackw...@rrd.com http://www.rrdonnelley.com <http://www.rrdonnelley.com/> * <mike.blackw...@rrd.com>*
